Commit Graph

841153 Commits

Author SHA1 Message Date
Baoquan He
00e5a2bbcc x86/mm/KASLR: Compute the size of the vmemmap section properly
The size of the vmemmap section is hardcoded to 1 TB to support the
maximum amount of system RAM in 4-level paging mode - 64 TB.

However, 1 TB is not enough for vmemmap in 5-level paging mode. Assuming
the size of struct page is 64 Bytes, to support 4 PB system RAM in 5-level,
64 TB of vmemmap area is needed:

  4 * 1000^5 PB / 4096 bytes page size * 64 bytes per page struct / 1000^4 TB = 62.5 TB.

This hardcoding may cause vmemmap to corrupt the following
cpu_entry_area section, if KASLR puts vmemmap very close to it and the
actual vmemmap size is bigger than 1 TB.

So calculate the actual size of the vmemmap region needed and then align
it up to 1 TB boundary.

In 4-level paging mode it is always 1 TB. In 5-level it's adjusted on
demand. The current code reserves 0.5 PB for vmemmap on 5-level. With
this change, the space can be saved and thus used to increase entropy
for the randomization.

 [ bp: Spell out how the 64 TB needed for vmemmap is computed and massage commit
   message. ]

Fixes: eedb92abb9 ("x86/mm: Make virtual memory layout dynamic for CONFIG_X86_5LEVEL=y")
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Kirill A. Shutemov <kirill@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: kirill.shutemov@linux.intel.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable <stable@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190523025744.3756-1-bhe@redhat.com
2019-06-07 23:12:13 +02:00
Linus Torvalds
d4425649c6 hwmon fixes for v5.2-rc4
Fix a couple of inconsistencies and locking problems in pmbus driver.
 Register with thermal subsystem only on systems supporting devicetree.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJc+sT5AAoJEMsfJm/On5mBb/kQAJwSIL7c4cOEjWikRqdVncDd
 3ABXeQRopGLv5LLtox7T8rFzF29MfeGbqMR1JUZGGZh6kbTFdhPGyVNZ/unkOXQD
 kIoiAfgixPNEzMC7r4vhCDPRyo+bKb4AavZbdnVvh/5G6wpBzsrJ80kQyNmlHyk4
 djEdIbfyNQWOMo3cpJQYm8z8tKtbmsUTqMTCJe2OhjnOl9uO6eKt6cHqBp/O4OVw
 jMAEfXkFLktF8oS+DT3f5NuedKEubruJ+6iUJ7RIZPMpWUP6bjrE57FlM2NKakUc
 f/OjpL0LHiZJWFi/3+gSFPRkLIP3VSO9xmF2hefL90AHlAkuwJqL/bT+tZ5EyL+d
 QmYClANL4GUmQpcwFJTBHaeRustr13E1GNkPD9Yz22qsExOkYFgZ/zRBXNoVqqQH
 tKUdAeMIa3yQcCSek4lc4usXK0i14u/6H5l1mlhApGuc2DYGgiXNeLIKZyiINQJM
 URqnvnA6lvYjSUoutop2T5P9iI8tSejU3wQH0nN2bNM7h7km/uJ6Z1IUnRrO0U6p
 0AZ5vO6ZTUT0E0i+32/0MiuFIksleR8lIiWvZErVKY1y0iKyZHh9IuHsXiUwoZBX
 Ial1gcD/d8lM4LsXEzaFIPCLHB72UVqK9YWX5KlS4BPAsFyT8RnTJPX/8C3N0ipO
 OaIJTU/7kEc14G+4b6GA
 =QTDh
 -----END PGP SIGNATURE-----

Merge tag 'hwmon-for-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - Fix a couple of inconsistencies and locking problems in pmbus driver

 - Register with thermal subsystem only on systems supporting devicetree

* tag 'hwmon-for-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (pmbus/core) Treat parameters as paged if on multiple pages
  hwmon: (pmbus/core) mutex_lock write in pmbus_set_samples
  hwmon: (core) add thermal sensors only if dev->of_node is present
2019-06-07 13:38:53 -07:00
Jan Glauber
893a7d32e8 lockref: Limit number of cmpxchg loop retries
The lockref cmpxchg loop is unbound as long as the spinlock is not
taken. Depending on the hardware implementation of compare-and-swap
a high number of loop retries might happen.

Add an upper bound to the loop to force the fallback to spinlocks
after some time. A retry value of 100 should not impact any hardware
that does not have this issue.

With the retry limit the performance of an open-close testcase
improved between 60-70% on ThunderX2.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jan Glauber <jglauber@marvell.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-07 13:15:06 -07:00
Andrey Konovalov
d93445225c uaccess: add noop untagged_addr definition
Architectures that support memory tagging have a need to perform untagging
(stripping the tag) in various parts of the kernel. This patch adds an
untagged_addr() macro, which is defined as noop for architectures that do
not support memory tagging. The oncoming patch series will define it at
least for sparc64 and arm64.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-07 13:09:06 -07:00
Linus Torvalds
d18c7e9d6e Xtensa fixes for v5.2-rc4
- fix section mismatch between memblock_reserve and mem_reserve. This
   fixes tinyconfig xtensa builds.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEK2eFS5jlMn3N6xfYUfnMkfg/oEQFAlz6s9UTHGpjbXZia2Jj
 QGdtYWlsLmNvbQAKCRBR+cyR+D+gRMovD/4oVWIQxzXc3ywQfVvFMXSjwXvQGVZn
 By0FH3QkVnHJZM1mHb5xY0ry4M0N7+fQCfPChPZCzUvW79P14KaRvNO7ij7OPe4L
 JPKx48peo01e3lSiTTvnveOVlF2FYMzQNBqZ65X/ZNpuGbP/+gNSrX4kY9VQLuTx
 zj7lDI/h8zJ6rxl86fe1VE5MXRHYPNF/gS7269P1wpH75ihvcLSqsid/VnuL7ckX
 rtkD0LGjDupORlDj2BAswrN+XlbKhLWgI9PsB9T9jr9HT2+M1zSu4LHb7VhwJvAP
 p54aXjRxCuRf/2hYGHgIbPK3M51Z9hgoCJT67g/zM/NpFIP2NC4OHh7lmvCQGubS
 SXC5VBz6IvVdUYfsVNRsL4F4Xpzz8k0sIdj8AYPfAkvinenk1XBU2PWWVN3IS24s
 gRTyivuMuytYrY/8CwhN3THCHwbHMkUXrm7sS/94gHaZ7LrVr2P6rjFSYw4dRjIY
 doHEbY0IzKF8ugHRxjk8jcx8s1XvWGQHbhefAO05hB/TWRRIwAkXIA4cMjLD5M4N
 M5WUiNNoiCiuLC+4L41LJ9ny+CQrFxyWotfuFp491lwQm/9dJQFhRoGqSgThOjhe
 AOBlO9SmJtAfFihf2zabqHrl0hJykxVnCT5XGqTHnYXuz8ZQIVbi0pP/8lWVjNL+
 2DNFGFj2yD1Lqw==
 =4yeH
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-20190607' of git://github.com/jcmvbkbc/linux-xtensa

Pull xtensa fix from Max Filippov:
 "Fix a section mismatch between memblock_reserve and mem_reserve.

  This fixes tinyconfig xtensa builds"

* tag 'xtensa-20190607' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: Fix section mismatch between memblock_reserve and mem_reserve
2019-06-07 13:06:00 -07:00
Jens Axboe
6c70f899b8 Merge branch 'nvme-5.2-rc-next' of git://git.infradead.org/nvme into for-linus
Pull NVMe fixes from Sagi.

* 'nvme-5.2-rc-next' of git://git.infradead.org/nvme:
  nvme-rdma: use dynamic dma mapping per command
  nvme: Fix u32 overflow in the number of namespace list calculation
  nvmet: fix data_len to 0 for bdev-backed write_zeroes
  nvme-tcp: fix queue mapping when queue count is limited
  nvme-rdma: fix queue mapping when queue count is limited
2019-06-07 14:04:28 -06:00
Linus Torvalds
33de0d1c68 Kbuild fixes for v5.2 (2nd)
- fix kselftest-merge to find config fragments in deeper directories
 
  - fix kconfig unit test, which was broken by SPDX tag addition
 
  - add + prefix to buildtar to suppress jobserver unavailable warning
 
  - fix checkstack.pl to recognize arch=arm64
 
  - suppress noisy warning from cc-cross-prefix
 -----BEGIN PGP SIGNATURE-----
 
 iQJSBAABCgA8FiEEbmPs18K1szRHjPqEPYsBB53g2wYFAlz6h4UeHHlhbWFkYS5t
 YXNhaGlyb0Bzb2Npb25leHQuY29tAAoJED2LAQed4NsGwREP/RCHEblpWi96Dpy5
 F3hAa7Km3TBsePcAxxQGlt+kbJaC5mlXHrXOdqvxomTl9xvuKQljB9k26qY1AaYH
 v7+kV7RL3lmhADYlzqaItCRQWO4kBAA6vKhvCeJ4CsWmtWvSE+ijUGdb3ZNfEx5T
 Q6JWL7BP+dQu/Hp/DXf1VxAjlO+0hVjmaDBBnUHhBUdumeGKJ/LCKXN7NXHu/yru
 UXSs6KbGanD2qlrorg0DH0l60WVYk9KbWLmfNIMAHqgCx+1GYEYiJPtDh28wzFpC
 i3sBxa3rCxTDhOaLMEMfknqx6JR6YHEXT88zF4DGm5Va/gMOIzISQ2YXl82epiQn
 iOa0y6Bf3qsMRsXXewij+KqqS4L7VYNzgal+6vyAWAJshn5xciyaQKfnatPtFhzA
 tr9Bwdk6T8IbBdDSYF/46a4KSH9mCLJntJV/DC2otYHKJFq3bVRz/FOI1AVcp2a+
 7pumBb01iyPOPivBK1Du5S6SOwW4BnjTiOReiNzcfIPDCVgrV5O0P0w5i18pnWH0
 kILbQ4DhBsDgpqYYrazFqzx9EClH5qiqmWToZ0CHhp3AWLrcEEFkttvU3YRLN9uI
 FtVoLnAPiWXxrrBdL4jW/IMWvqqptsXLqfL5vbL6vcvAb4ZdNMGUXlK81etfdKpD
 ZfXSSecwkjUF2CQrua+CTmPEQhQZ
 =xcwx
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-fixes-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild fixes from Masahiro Yamada:

 - fix kselftest-merge to find config fragments in deeper directories

 - fix kconfig unit test, which was broken by SPDX tag addition

 - add + prefix to buildtar to suppress jobserver unavailable warning

 - fix checkstack.pl to recognize arch=arm64

 - suppress noisy warning from cc-cross-prefix

* tag 'kbuild-fixes-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: use more portable 'command -v' for cc-cross-prefix
  scripts/checkstack.pl: Fix arm64 wrong or unknown architecture
  kbuild: tar-pkg: enable communication with jobserver
  kconfig: tests: fix recursive inclusion unit test
  kbuild: teach kselftest-merge to find nested config files
2019-06-07 11:59:20 -07:00
Linus Torvalds
91f152e75b MMC host:
- sdhci: Fix SDIO IRQ thread deadlock
  - sdhci-tegra: Fix a warning message
  - sdhci_am654: Fix SLOTTYPE write
  - meson-gx: Fix IRQ ack
  - tmio: Fix SCC error handling to avoid false positive CRC error
 
 MEMSTICK core:
  - mspro_block: Fix returning a correct error code
 -----BEGIN PGP SIGNATURE-----
 
 iQJLBAABCgA1FiEEugLDXPmKSktSkQsV/iaEJXNYjCkFAlz6Pf0XHHVsZi5oYW5z
 c29uQGxpbmFyby5vcmcACgkQ/iaEJXNYjCmBjA/+NbRo/r86sVFxcuOlrfApXjZd
 mPuR2J659DC7A9810BdKBqxZSy6DvivWxiNfYDXpFkbXcpta1mAtTkXMYthstgXD
 G2ymJOGEKaKlx8NtRfA02B5Q3Prymf1DbG6+yQQmMkUw2snUBJQiAWGCycV+zHQn
 3TTefhKqgXemoZEUblFYKYSqV6nM/LWMyovAC1GzvqDLvYoHITKXMpVqxX/OHFs6
 BrWsJLqYsNkkW0upd5Xp41HJ8gUCOsh4IRk0WFjAQPJUMF0HoQ0bcCyKvF9Bdvl9
 gyQqnYct8JNwbFOQbocrqWEDXIVQR9lflegpo5G8yqmmNW/nvRhlgULcWITqztGk
 PGCb0Dx1/NmlDN7IkVMzx1iK9su+TKpjPIuCQtzgNz90LCScsyBxn0VoQttdM4Cf
 TrnsWKncWaAuhmNwZFrl/hpwS3jDzmDLZog2vurnRx1rouEwKaCtvN9zl912i1hp
 0hqPr7GGNbr5RiuoZMv+3B2I7QBTAfUah9nBr91QuTNynS0fG3CMZw4iW+DZXLHC
 NNkNSyYhZCires9KfatUVIygn+fF0K6ZtU0zXPLzSFBAc21oT90RtlN2FT9LBhOz
 GpQDVJcX7g7LsXL/W4DIQ7Bq8umV4bdK5rnvi7sNzmKov3lWZ2XbB3g1Wrm7vetp
 4MK1MM4aBqtHn9AhH1I=
 =O6DX
 -----END PGP SIGNATURE-----

Merge tag 'mmc-v5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "Here's a couple of MMC and MEMSTICK fixes:

  MMC host:
   - sdhci: Fix SDIO IRQ thread deadlock
   - sdhci-tegra: Fix a warning message
   - sdhci_am654: Fix SLOTTYPE write
   - meson-gx: Fix IRQ ack
   - tmio: Fix SCC error handling to avoid false positive CRC error

  MEMSTICK core:
   - mspro_block: Fix returning a correct error code"

* tag 'mmc-v5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci_am654: Fix SLOTTYPE write
  mmc: sdhci: Fix SDIO IRQ thread deadlock
  mmc: meson-gx: fix irq ack
  mmc: tmio: fix SCC error handling to avoid false positive CRC error
  mmc: tegra: Fix a warning message
  memstick: mspro_block: Fix an error code in mspro_block_issue_req()
2019-06-07 11:52:31 -07:00
Linus Torvalds
a373ec23ab Power management fixes for 5.2-rc4
- Fix a crash that occurs when a kernel with 'nosmt' in the command
    line is used to resume the system from hibernation (as the "restore"
    kernel), because memory mapping differences between the restore and
    image kernels cause SMT siblings to be woken up from idle states
    and subsequently they try to fetch instructions from incorrect
    memory locations (Jiri Kosina).
 
  - Cause the new Performance and Energy Bias Hint (EPB) code to be
    built only if CONFIG_PM is set, because that code is not really
    necessary otherwise (Rafael Wysocki).
 
  - Add kerneldoc comments to documents some helper functions related
    to system-wide suspend to avoid possible confusion regarding their
    purpose (Rafael Wysocki).
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAlz6Kf8SHHJqd0Byand5
 c29ja2kubmV0AAoJEILEb/54YlRxcxkP/05X18Js4yZb7aUc9p6k0rAhI2kwE8OM
 MiF68H2b57qBinR5Amc/tCtMLvdScieVThFmti8nxO1Fvm4Ld+ZUfRPXZUmCc7VJ
 rQ7r1uEeWXC+vb5b2587jFVzRzARzQ9xF590tneI/T4p3yBvWaj6W/t0pxU4+Lok
 hAUeeMNIyBhNHkCZVeX3ZxNM03fFWbZBU1GIFhmDxMaXRAsYt5N0dtes/mjbhAFw
 /iXDuPv2FL4JqU/vuVWR5/icd35IZVDq1bCz5ChRlUKweoj+KhK9uxoKTYrAh3zo
 jhXE6RBZgVbVUzSWjhkWHEN2RkylIE2uhUvVpAwWFuqoHUfFOdXfF/PcRwkNC9tx
 XPNYHMzWKNXS/OIzBHqqv3AhNelou7onh78OROpIsw0AkbA2afN4RjywnybdzIwX
 Lb3q7B1DQt6Nv/sf7zyOzUuE0kJLJ4FGm4mCOkXb+CLQ9X/kkePlaOWi4/UBvT5x
 L07M4nTQla65UVIL1nnru8yTNSy2dESOj9QHlKJnkwOTJK1RfxLMmeUbao3EZkzh
 5woshADVHlRNCt/2fo2bllzJeDNjeXfiOjOOVsnf+vjiQ034d1CD9IXlVgW/QC32
 V/DjiWCai1HvHq5j5KurLDJOyMmDl8O9tqCLNSYAzOkvMJsuLN7rhzJossZtYCT4
 kTpy2BLIOrMI
 =r5bv
 -----END PGP SIGNATURE-----

Merge tag 'pm-5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a crash during resume from hibernation introduced during the
  4.19 cycle, cause the new Performance and Energy Bias Hint (EPB) code
  to be built only if CONFIG_PM is set and add a few missing kerneldoc
  comments.

  Specifics:

   - Fix a crash that occurs when a kernel with 'nosmt' in the command
     line is used to resume the system from hibernation (as the
     "restore" kernel), because memory mapping differences between the
     restore and image kernels cause SMT siblings to be woken up from
     idle states and subsequently they try to fetch instructions from
     incorrect memory locations (Jiri Kosina).

   - Cause the new Performance and Energy Bias Hint (EPB) code to be
     built only if CONFIG_PM is set, because that code is not really
     necessary otherwise (Rafael Wysocki).

   - Add kerneldoc comments to documents some helper functions related
     to system-wide suspend to avoid possible confusion regarding their
     purpose (Rafael Wysocki)"

* tag 'pm-5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  x86/power: Fix 'nosmt' vs hibernation triple fault during resume
  PM: sleep: Add kerneldoc comments to some functions
  x86: intel_epb: Do not build when CONFIG_PM is unset
2019-06-07 11:36:17 -07:00
Jann Horn
de9f869616 x86/insn-eval: Fix use-after-free access to LDT entry
get_desc() computes a pointer into the LDT while holding a lock that
protects the LDT from being freed, but then drops the lock and returns the
(now potentially dangling) pointer to its caller.

Fix it by giving the caller a copy of the LDT entry instead.

Fixes: 670f928ba0 ("x86/insn-eval: Add utility function to get segment descriptor")
Cc: stable@vger.kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-07 11:11:06 -07:00
Linus Torvalds
1e1d926369 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Free AF_PACKET po->rollover properly, from Willem de Bruijn.

 2) Read SFP eeprom in max 16 byte increments to avoid problems with
    some SFP modules, from Russell King.

 3) Fix UDP socket lookup wrt. VRF, from Tim Beale.

 4) Handle route invalidation properly in s390 qeth driver, from Julian
    Wiedmann.

 5) Memory leak on unload in RDS, from Zhu Yanjun.

 6) sctp_process_init leak, from Neil HOrman.

 7) Fix fib_rules rule insertion semantic change that broke Android,
    from Hangbin Liu.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (33 commits)
  pktgen: do not sleep with the thread lock held.
  net: mvpp2: Use strscpy to handle stat strings
  net: rds: fix memory leak in rds_ib_flush_mr_pool
  ipv6: fix EFAULT on sendto with icmpv6 and hdrincl
  ipv6: use READ_ONCE() for inet->hdrincl as in ipv4
  Revert "fib_rules: return 0 directly if an exactly same rule exists when NLM_F_EXCL not supplied"
  net: aquantia: fix wol configuration not applied sometimes
  ethtool: fix potential userspace buffer overflow
  Fix memory leak in sctp_process_init
  net: rds: fix memory leak when unload rds_rdma
  ipv6: fix the check before getting the cookie in rt6_get_cookie
  ipv4: not do cache for local delivery if bc_forwarding is enabled
  s390/qeth: handle error when updating TX queue count
  s390/qeth: fix VLAN attribute in bridge_hostnotify udev event
  s390/qeth: check dst entry before use
  s390/qeth: handle limited IPv4 broadcast in L3 TX path
  net: fix indirect calls helpers for ptype list hooks.
  net: ipvlan: Fix ipvlan device tso disabled while NETIF_F_IP_CSUM is set
  udp: only choose unbound UDP socket for multicast when not in a VRF
  net/tls: replace the sleeping lock around RX resync with a bit lock
  ...
2019-06-07 09:29:14 -07:00
Linus Torvalds
6e38335dcc 5.2 First rc pull request
The usual driver bug fixes and fixes for a couple of regressions introduced in
 5.2:
 
 - Fix a race on bootup with RDMA device renaming and srp. SRP also needs to
   rename its internal sys files
 
 - Fix a memory leak in hns
 
 - Don't leak resources in efa on certain error unwinds
 
 - Don't panic in certain error unwinds in ib_register_device
 
 - Various small user visible bug fix patches for the hfi and efa drivers
 
 - Fix the 32 bit compilation break
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEfB7FMLh+8QxL+6i3OG33FX4gmxoFAlz5c5oACgkQOG33FX4g
 mxpEEhAAk64phaKUih9KVT0MpC1zezB1C0EGKg45GKuMOFUFJQ5tZ0g4s6aDEbG3
 374ZE9h82HMgKn4tQ95110AKvCI+VAbbKOS7kzk1rLWE1ruJxk5DNsvp1v5/S3FE
 GXBSws+HtZtdiRAMTYyEOfz0MqpvghFg0vor4PugrmOuqIe2a0bkYPEzYPjYbaNH
 jSctd/q4s/o02n6gfbCrFpXsW0Va3OIaDX5a+Fx5+lWW+GPr/Uzk/3kN95mFbDRp
 XsCE80V+n3ceKSQUp0lYtxU3tm2mT1JpiiZjXuKyjRV8IMUS+xkdJ8scEz0upGcg
 +Jr74mN/xKT3toHaMv7fZ3RGlYgFsSsZcAApm6LrIlTNQXKjJ8hl+2BWdi4nRfYZ
 X89RRWEl3j8i6URu65iH7y7IlfFEhjJGmATUQFdrfECR9hBMJ8VHzBfcz7aYgoac
 Ggi+2Vjm7GQlr9mzW/phXb25PWqP5yVTW6/3BUtMs3oY7kd6vE2n9XzGIy13uBpX
 fzY/tnIMrgZMjphYPPbBAbwl+tBKZCu4k6lpP7cLsVsIwY0NIWS26JCnCdO0efqR
 SnAUPjoAV7nkpG3mMO9Qv7h7yar3HrG7ED15hfmB4VowRNQMfDoTLc8jVWDvGk4/
 aFBSH8dEjszZ5tMO9HL+RXnvpkRcDyQpfVQJttY5adZFQlUOd+0=
 =RmxY
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "Things are looking pretty quiet here in RDMA, not too many bug fixes
  rolling in right now. The usual driver bug fixes and fixes for a
  couple of regressions introduced in 5.2:

   - Fix a race on bootup with RDMA device renaming and srp. SRP also
     needs to rename its internal sys files

   - Fix a memory leak in hns

   - Don't leak resources in efa on certain error unwinds

   - Don't panic in certain error unwinds in ib_register_device

   - Various small user visible bug fix patches for the hfi and efa
     drivers

   - Fix the 32 bit compilation break"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/efa: Remove MAYEXEC flag check from mmap flow
  mlx5: avoid 64-bit division
  IB/hfi1: Validate page aligned for a given virtual address
  IB/{qib, hfi1, rdmavt}: Correct ibv_devinfo max_mr value
  IB/hfi1: Insure freeze_work work_struct is canceled on shutdown
  IB/rdmavt: Fix alloc_qpn() WARN_ON()
  RDMA/core: Fix panic when port_data isn't initialized
  RDMA/uverbs: Pass udata on uverbs error unwind
  RDMA/core: Clear out the udata before error unwind
  RDMA/hns: Fix PD memory leak for internal allocation
  RDMA/srp: Rename SRP sysfs name after IB device rename trigger
2019-06-07 09:25:27 -07:00
Linus Torvalds
a02a532c2a arm64 fixes for -rc4
- Fix boot crash on platforms with SVE2 due to missing register encoding
 
 - Fix architected timer accessors when CONFIG_OPTIMIZE_INLINING=y
 
 - Move cpu_logical_map into smp.h for use by upcoming irqchip drivers
 
 - Trivial typo fix in comment
 
 - Disable some useless, noisy warnings from GCC 9
 -----BEGIN PGP SIGNATURE-----
 
 iQEzBAABCgAdFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAlz6QlIACgkQt6xw3ITB
 YzQJRAf/e2PwVOHLwUIbPg//rKKNlJmBMnIUROEiAPjY7atTfjuYd3/65pIq7ZuO
 RjMIUT1A2kg+pMOFzmXObLICq3Xl1/7LUUPIQ1iDvEeWIRb7HKQXoJkg9lvUEy89
 T4sR1EBkK7uYh0w+/L7k1LESGgl4+VFY/ZY+4NmwsXEK4jfty3by7zE7Vy35MvQ6
 XuEbYuMNjfskgBGbZPVqV8qHUlRurfhWWXjdgdAe9E7+fsHPuOrIr4+uXwAyVtRR
 1/4tLySNW2GE8o0Ftun82ZasFTTgPc18ozASBYX1FMlQRaXznNREmSHYaIiartJE
 VorEdRe25ztdI54fVM2dL0KKmTZi1g==
 =ErME
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Another round of mostly-benign fixes, the exception being a boot crash
  on SVE2-capable CPUs (although I don't know where you'd find such a
  thing, so maybe it's benign too).

  We're in the process of resolving some big-endian ptrace breakage, so
  I'll probably have some more for you next week.

  Summary:

   - Fix boot crash on platforms with SVE2 due to missing register
     encoding

   - Fix architected timer accessors when CONFIG_OPTIMIZE_INLINING=y

   - Move cpu_logical_map into smp.h for use by upcoming irqchip drivers

   - Trivial typo fix in comment

   - Disable some useless, noisy warnings from GCC 9"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Silence gcc warnings about arch ABI drift
  ARM64: trivial: s/TIF_SECOMP/TIF_SECCOMP/ comment typo fix
  arm64: arch_timer: mark functions as __always_inline
  arm64: smp: Moved cpu_logical_map[] to smp.h
  arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding()
2019-06-07 09:21:48 -07:00
Masahiro Yamada
913ab9780f kbuild: use more portable 'command -v' for cc-cross-prefix
To print the pathname that will be used by shell in the current
environment, 'command -v' is a standardized way. [1]

'which' is also often used in scripts, but it is less portable.

When I worked on commit bd55f96fa9 ("kbuild: refactor cc-cross-prefix
implementation"), I was eager to use 'command -v' but it did not work.
(The reason is explained below.)

I kept 'which' as before but got rid of '> /dev/null 2>&1' as I
thought it was no longer needed. Sorry, I was wrong.

It works well on my Ubuntu machine, but Alexey Brodkin reports noisy
warnings on CentOS7 when 'which' fails to find the given command in
the PATH environment.

  $ which foo
  which: no foo in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin)

Given that behavior of 'which' depends on system (and it may not be
installed by default), I want to try 'command -v' once again.

The specification [1] clearly describes the behavior of 'command -v'
when the given command is not found:

  Otherwise, no output shall be written and the exit status shall reflect
  that the name was not found.

However, we need a little magic to use 'command -v' from Make.

$(shell ...) passes the argument to a subshell for execution, and
returns the standard output of the command.

Here is a trick. GNU Make may optimize this by executing the command
directly instead of forking a subshell, if no shell special characters
are found in the command and omitting the subshell will not change the
behavior.

In this case, no shell special character is used. So, Make will try
to run it directly. However, 'command' is a shell-builtin command,
then Make would fail to find it in the PATH environment:

  $ make ARCH=m68k defconfig
  make: command: Command not found
  make: command: Command not found
  make: command: Command not found

In fact, Make has a table of shell-builtin commands because it must
ask the shell to execute them.

Until recently, 'command' was missing in the table.

This issue was fixed by the following commit:

| commit 1af314465e5dfe3e8baa839a32a72e83c04f26ef
| Author: Paul Smith <psmith@gnu.org>
| Date:   Sun Nov 12 18:10:28 2017 -0500
|
|     * job.c: Add "command" as a known shell built-in.
|
|     This is not a POSIX shell built-in but it's common in UNIX shells.
|     Reported by Nick Bowler <nbowler@draconx.ca>.

Because the latest release is GNU Make 4.2.1 in 2016, this commit is
not included in any released versions. (But some distributions may
have back-ported it.)

We need to trick Make to spawn a subshell. There are various ways to
do so:

 1) Use a shell special character '~' as dummy

    $(shell : ~; command -v $(c)gcc)

 2) Use a variable reference that always expands to the empty string
    (suggested by David Laight)

    $(shell command$${x:+} -v $(c)gcc)

 3) Use redirect

    $(shell command -v $(c)gcc 2>/dev/null)

I chose 3) to not confuse people. The stderr would not be polluted
anyway, but it will provide extra safety, and is easy to understand.

Tested on Make 3.81, 3.82, 4.0, 4.1, 4.2, 4.2.1

[1] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html

Fixes: bd55f96fa9 ("kbuild: refactor cc-cross-prefix implementation")
Cc: linux-stable <stable@vger.kernel.org> # 5.1
Reported-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Alexey Brodkin <abrodkin@synopsys.com>
2019-06-08 00:38:47 +09:00
Vasily Gorbik
0ab0d7ac20 s390/unwind: correct stack switching during unwind
Adjust conditions in on_stack function. That fixes backchain unwinder
which was unable to read pt_regs at the very bottom of the stack and
hence couldn't follow stacks (e.g. from async stack to a task stack).

Fixes: 78c98f9074 ("s390/unwind: introduce stack unwind API")
Reported-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2019-06-07 15:20:44 +02:00
Don Brace
625d7d3518 scsi: hpsa: correct ioaccel2 chaining
- set ioaccel2_sg_element member 'chain_indicator' to IOACCEL2_LAST_SG for
  the last s/g element.

- set ioaccel2_sg_element member 'chain_indicator' to IOACCEL2_CHAIN when
  chaining.

Reviewed-by: Bader Ali - Saleh <bader.alisaleh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Matt Perricone <matt.perricone@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-06-07 09:19:08 -04:00
Nikolay Borisov
8103d10b71 btrfs: Always trim all unallocated space in btrfs_trim_free_extents
This patch removes support for range parameters of FITRIM ioctl when
trimming unallocated space on devices. This is necessary since ranges
passed from user space are generally interpreted as logical addresses,
whereas btrfs_trim_free_extents used to interpret them as device
physical extents. This could result in counter-intuitive behavior for
users so it's best to remove that support altogether.

Additionally, the existing range support had a bug where if an offset
was passed to FITRIM which overflows u64 e.g. -1 (parsed as u64
18446744073709551615) then wrong data was fed into btrfs_issue_discard,
which in turn leads to wrap-around when aligning the passed range and
results in wrong regions being discarded which leads to data corruption.

Fixes: c2d1b3aae3 ("btrfs: Honour FITRIM range constraints during free space trim")
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-06-07 14:52:05 +02:00
Christophe Leroy
c21f5a9ed8 powerpc/32s: fix booting with CONFIG_PPC_EARLY_DEBUG_BOOTX
When booting through OF, setup_disp_bat() does nothing because
disp_BAT are not set. By change, it used to work because BOOTX
buffer is mapped 1:1 at address 0x81000000 by the bootloader, and
btext_setup_display() sets virt addr same as phys addr.

But since commit 215b823707 ("powerpc/32s: set up an early static
hash table for KASAN."), a temporary page table overrides the
bootloader mapping.

This 0x81000000 is also problematic with the newly implemented
Kernel Userspace Access Protection (KUAP) because it is within user
address space.

This patch fixes those issues by properly setting disp_BAT through
a call to btext_prepare_BAT(), allowing setup_disp_bat() to
properly setup BAT3 for early bootx screen buffer access.

Reported-by: Mathieu Malaterre <malat@debian.org>
Fixes: 215b823707 ("powerpc/32s: set up an early static hash table for KASAN.")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-07 19:00:14 +10:00
Rafael J. Wysocki
a964d23c94 Merge branch 'pm-x86'
* pm-x86:
  x86/power: Fix 'nosmt' vs hibernation triple fault during resume
  x86: intel_epb: Do not build when CONFIG_PM is unset
2019-06-07 10:48:57 +02:00
Neil Armstrong
0b84933db7 drm/meson: fix G12A primary plane disabling
The G12A Primary plane was disabled by writing in the OSD1 configuration
registers, but this caused the plane blender to stall instead of continuing
to blend only the overlay plane.

Fix this by disabling the OSD1 plane in the blender registers, and also
enabling it back using the same register.

Fixes: 490f50c109 ("drm/meson: Add G12A support for OSD1 Plane")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
[narmstrong: fixed nit in commit log]
Link: https://patchwork.freedesktop.org/patch/msgid/20190605141253.24165-3-narmstrong@baylibre.com
2019-06-07 10:05:05 +02:00
Neil Armstrong
c03ea50e27 drm/meson: fix primary plane disabling
The primary plane disable logic is flawed, when the primary plane is
disabled, it is re-enabled in the vsync irq when another plane is updated.

Handle the plane disabling correctly by handling the primary plane
enable flag in the primary plane update & disable callbacks.

Fixes: 490f50c109 ("drm/meson: Add G12A support for OSD1 Plane")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190605141253.24165-2-narmstrong@baylibre.com
2019-06-07 10:04:21 +02:00
Neil Armstrong
e98c7952db drm/meson: fix G12A HDMI PLL settings for 4K60 1000/1001 variations
The Amlogic G12A HDMI PLL needs some specific settings to lock with
different fractional values for the 5,4GHz mode.

Handle the 1000/1001 variation fractional case here to avoid having
the PLL in an non lockable state.

Fixes: 202b9808f8 ("drm/meson: Add G12A Video Clock setup")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190605125320.8708-1-narmstrong@baylibre.com
2019-06-07 10:03:57 +02:00
Angelo Ruocco
19e9da9e86 block, bfq: add weight symlink to the bfq.weight cgroup parameter
Many userspace tools and services use the proportional-share policy of
the blkio/io cgroups controller. The CFQ I/O scheduler implemented
this policy for the legacy block layer. To modify the weight of a
group in case CFQ was in charge, the 'weight' parameter of the group
must be modified. On the other hand, the BFQ I/O scheduler implements
the same policy in blk-mq, but, with BFQ, the parameter to modify has
a different name: bfq.weight (forced choice until legacy block was
present, because two different policies cannot share a common parameter
in cgroups).

Due to CFQ legacy, most if not all userspace configurations still use
the parameter 'weight', and for the moment do not seem likely to be
changed. But, when CFQ went away with legacy block, such a parameter
ceased to exist.

So, a simple workaround has been proposed [1] to make all
configurations work: add a symlink, named weight, to bfq.weight. This
commit adds such a symlink.

[1] https://lkml.org/lkml/2019/4/8/555

Suggested-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Angelo Ruocco <angeloruocco90@gmail.com>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-07 01:29:40 -06:00
Angelo Ruocco
54b7b868e8 cgroup: let a symlink too be created with a cftype file
This commit enables a cftype to have a symlink (of any name) that
points to the file associated with the cftype.

Signed-off-by: Angelo Ruocco <angeloruocco90@gmail.com>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-07 01:29:39 -06:00
Dave Airlie
671e2ee5ee Merge branch 'linux-5.2' of git://github.com/skeggsb/linux into drm-fixes
" This is a bit more than I'd like to be pushing at this point in a
cycle, but it's a fairly important issue.  There's been numerous
reports of more recent GP10[2467] boards failing to load, and I've
worked with NVIDIA FW engineers and tracked this down to the FW we've
been using not properly supporting the boards in question.

I've pushed an update to linux-firmware with the new FW version, which
unfortunately contains API changes vs the older firmware.

This series teaches the ACR subsystem inside nouveau enough to be able
to deal with supporting multiple incompatible FW revisions, and adds
support to the relevant chipsets for loading the newer FW revision, if
it's available."

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Ben Skeggs <skeggsb@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CACAvsv7pG+vur0Kn_TyU3ainnkvJVw07upnnaQNOToF+kzQtDQ@mail.gmail.com
2019-06-07 17:16:00 +10:00
Nicholas Piggin
a00196a272 powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate()
The change to pmdp_invalidate() to mark the pmd with _PAGE_INVALID
broke the synchronisation against lock free lookups,
__find_linux_pte()'s pmd_none() check no longer returns true for such
cases.

Fix this by adding a check for this condition as well.

Fixes: da7ad366b4 ("powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit")
Cc: stable@vger.kernel.org # v4.20+
Suggested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-07 16:28:28 +10:00
Nicholas Piggin
33258a1db1 powerpc/64s: Fix THP PMD collapse serialisation
Commit 1b2443a547 ("powerpc/book3s64: Avoid multiple endian
conversion in pte helpers") changed the actual bitwise tests in
pte_access_permitted by using pte_write() and pte_present() helpers
rather than raw bitwise testing _PAGE_WRITE and _PAGE_PRESENT bits.

The pte_present() change now returns true for PTEs which are
!_PAGE_PRESENT and _PAGE_INVALID, which is the combination used by
pmdp_invalidate() to synchronize access from lock-free lookups.
pte_access_permitted() is used by pmd_access_permitted(), so allowing
GUP lock free access to proceed with such PTEs breaks this
synchronisation.

This bug has been observed on a host using the hash page table MMU,
with random crashes and corruption in guests, usually together with
bad PMD messages in the host.

Fix this by adding an explicit check in pmd_access_permitted(), and
documenting the condition explicitly.

The pte_write() change should be okay, and would prevent GUP from
falling back to the slow path when encountering savedwrite PTEs, which
matches what x86 (that does not implement savedwrite) does.

Fixes: 1b2443a547 ("powerpc/book3s64: Avoid multiple endian conversion in pte helpers")
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-07 16:26:44 +10:00
Christophe Leroy
6c284228eb powerpc: Fix kexec failure on book3s/32
In the old days, _PAGE_EXEC didn't exist on 6xx aka book3s/32.
Therefore, allthough __mapin_ram_chunk() was already mapping kernel
text with PAGE_KERNEL_TEXT and the rest with PAGE_KERNEL, the entire
memory was executable. Part of the memory (first 512kbytes) was
mapped with BATs instead of page table, but it was also entirely
mapped as executable.

In commit 385e89d5b2 ("powerpc/mm: add exec protection on
powerpc 603"), we started adding exec protection to some 6xx, namely
the 603, for pages mapped via pagetables.

Then, in commit 63b2bc6195 ("powerpc/mm/32s: Use BATs for
STRICT_KERNEL_RWX"), the exec protection was extended to BAT mapped
memory, so that really only the kernel text could be executed.

The problem here is that kexec is based on copying some code into
upper part of memory then executing it from there in order to install
a fresh new kernel at its definitive location.

However, the code is position independant and first part of it is
just there to deactivate the MMU and jump to the second part. So it
is possible to run this first part inplace instead of running the
copy. Once the MMU is off, there is no protection anymore and the
second part of the code will just run as before.

Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Fixes: 63b2bc6195 ("powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX")
Cc: stable@vger.kernel.org # v5.1+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-07 16:24:47 +10:00
Ben Skeggs
ab4bec16d4 drm/nouveau/secboot/gp10[2467]: support newer FW to fix SEC2 failures on some boards
Some newer boards with these chipsets aren't compatible with the prior
version of the SEC2 FW, and fail to load as a result.

This newer FW is actually the one we already use on >=GP108.

Unfortunately, there are interface differences in GP108's FW, making it
impossible to simply move files around in linux-firmware to solve this.

We need to be able to keep compatibility with all linux-firmware/kernel
combinations, which means supporting both firmwares.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2019-06-07 15:13:58 +10:00
Ben Skeggs
9352ce3775 drm/nouveau/secboot: enable loading of versioned LS PMU/SEC2 ACR msgqueue FW
Some chipsets will be switching to updated SEC2 LS firmware, so we need to
plumb that through.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2019-06-07 15:13:58 +10:00
Ben Skeggs
5f0f8b573a drm/nouveau/secboot: split out FW version-specific LS function pointers
It's not enough to have per-falcon structures anymore, we have multiple
versions of some firmware now that have interface differences.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2019-06-07 15:13:58 +10:00
Ben Skeggs
c26f3061fe drm/nouveau/secboot: pass max supported FW version to LS load funcs
Will be passed to the FW loader function as an upper bound on the supported
FW version to attempt to load.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2019-06-07 15:13:58 +10:00
Ben Skeggs
475cf02b83 drm/nouveau/core: support versioned firmware loading
We have a need for this now with updated SEC2 LS FW images that have an
incompatible interface from the previous version.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2019-06-07 15:13:58 +10:00
Ben Skeggs
8854eed1a4 drm/nouveau/core: pass subdev into nvkm_firmware_get, rather than device
It'd be nice to have FW loading debug messages to appear for the relevant
subsystem, when enabled.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2019-06-07 15:13:58 +10:00
Ming Lei
c3e2219216 block: free sched's request pool in blk_cleanup_queue
In theory, IO scheduler belongs to request queue, and the request pool
of sched tags belongs to the request queue too.

However, the current tags allocation interfaces are re-used for both
driver tags and sched tags, and driver tags is definitely host wide,
and doesn't belong to any request queue, same with its request pool.
So we need tagset instance for freeing request of sched tags.

Meantime, blk_mq_free_tag_set() often follows blk_cleanup_queue() in case
of non-BLK_MQ_F_TAG_SHARED, this way requires that request pool of sched
tags to be freed before calling blk_mq_free_tag_set().

Commit 47cdee29ef ("block: move blk_exit_queue into __blk_release_queue")
moves blk_exit_queue into __blk_release_queue for simplying the fast
path in generic_make_request(), then causes oops during freeing requests
of sched tags in __blk_release_queue().

Fix the above issue by move freeing request pool of sched tags into
blk_cleanup_queue(), this way is safe becasue queue has been frozen and no any
in-queue requests at that time. Freeing sched tags has to be kept in queue's
release handler becasue there might be un-completed dispatch activity
which might refer to sched tags.

Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Christoph Hellwig <hch@lst.de>
Fixes: 47cdee29ef ("block: move blk_exit_queue into __blk_release_queue")
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-06 22:39:39 -06:00
Dave Airlie
e659b4122c Merge tag 'drm-intel-fixes-2019-06-06' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- Include gvt-fixes-2019-06-05

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190606120401.GA16071@jlahtine-desk.ger.corp.intel.com
2019-06-07 10:41:33 +10:00
Dave Airlie
bcc9d0e346 Merge branch 'malidp-fixes' of git://linux-arm.org/linux-ld into drm-fixes
Assorted set of patches for Arm DRM drivers that I maintain
in my tree.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190604144205.GO15316@e110455-lin.cambridge.arm.com
2019-06-07 07:31:59 +10:00
Linus Torvalds
16d72dd489 Merge branch 'parisc-5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:

 - Fix crashes when accessing PCI devices on some machines like C240 and
   J5000. The crashes were triggered because we replaced cache flushes
   by nops in the alternative coding where we shouldn't for some
   machines.

 - Dave fixed a race in the usage of the sr1 space register when used to
   load the coherence index.

 - Use the hardware lpa instruction to to load the physical address of
   kernel virtual addresses in the iommu driver code.

 - The kernel may fail to link when CONFIG_MLONGCALLS isn't set. Solve
   that by rearranging functions in the final vmlinux executeable.

 - Some defconfig cleanups and removal of compiler warnings.

* 'parisc-5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix crash due alternative coding for NP iopdir_fdc bit
  parisc: Use lpa instruction to load physical addresses in driver code
  parisc: configs: Remove useless UEVENT_HELPER_PATH
  parisc: Use implicit space register selection for loading the coherence index of I/O pdirs
  parisc: Fix compiler warnings in float emulation code
  parisc/slab: cleanup after /proc/slab_allocators removal
  parisc: Allow building 64-bit kernel without -mlong-calls compiler option
  parisc: Kconfig: remove ARCH_DISCARD_MEMBLOCK
2019-06-06 13:13:09 -07:00
Linus Torvalds
ae8766042b Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
 "This fixes a regression that breaks the jitterentropy RNG and a
  potential memory leak in hmac"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: hmac - fix memory leak in hmac_init_tfm()
  crypto: jitterentropy - change back to module_init()
2019-06-06 13:10:49 -07:00
Linus Torvalds
01047631df Changes since last update:
- Fix some forgotten strings in a log debugging function
 - Fix incorrect unit conversion in online fsck code
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEUzaAxoMeQq6m2jMV+H93GTRKtOsFAlz1Ur0ACgkQ+H93GTRK
 tOshcA//X+tEFZGF+oosQ3h/IJqr9pODZfVf76mQIpg/5IU7WUzONGjTsjiHyH93
 zC2qw7l7m/3LyCSXfuJfuWOCyPXRRj7Dv+iUCbjmAh0OAn6Alpa1VN9jxABTeTuY
 xeCoNdRBCg6wF2XLLVgEN+VEdrFc7F7x/4OyoW5dmmBQakNOWlVgLtQqO+7gK/hS
 Qc+xw9ekKvkceHi//NXJTSXAZ0EfntzNZ/Fg41O2cztWV4oKxl2a4ej+j0g8/u9e
 rabTP54RH8dNJIejRmWU3dxz/w7OHSOO84LW/Q4LMKykfhLV6lhPL25igy1eLNhY
 OpcCWQio4ZKBwd8UoXCH0HA4dprusPipI1JIXp/YDHGFb0PumhkZaO/1xM0G5J+o
 3n1A1m7MW16jXAwlwBq0A6UNUFGyMfhfQiCluikBwkpR5dhWQoLQ5/IWZxs7ibUy
 0M5POwnYUsx7xcx3/TjUsLaGbBrqD/F4LXXGmxVJQa6Dt6B0ctyLDnjN08mNwR0e
 4Kvck4yxUHrUoXGaOhtddZmloVcrY58CwwHPabwoA3qC39ktKvp5PPrTNPiao8Ew
 oILteFrpQxPfg1AItXO/QMcGvj7ragHSA2O0XqD5Tm61jWErfpIAyRQ89oXT5GUt
 Z52uOI164u/8T4S/HUvi9tqYuZ+xudG4krIClDCXBaww1W2xNjo=
 =WFWW
 -----END PGP SIGNATURE-----

Merge tag 'xfs-5.2-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "Here are a couple more bug fixes for 5.2. Changes since last update:

   - Fix some forgotten strings in a log debugging function

   - Fix incorrect unit conversion in online fsck code"

* tag 'xfs-5.2-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: inode btree scrubber should calculate im_boffset correctly
  xfs: fix broken log reservation debugging
2019-06-06 12:36:54 -07:00
Linus Torvalds
dc8ca9cc6e Revert commit "gfs2: Replace gl_revokes with a GLF flag".
-----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJc+SSIAAoJENW/n+sDE2U6Vx8P/jP9FW/JNMj4JeXVMPvSP4eB
 raZDEUNksGnWu7/JAjoz5PruPZaeW+CoDq25oiB7MalMopEXZ4RRovhmrrZBXqP3
 jI7/4yoHRJf5907ZFfbNHX3vL8up+I3Ej1jf8fsEpbTMlO95n5dtsTJIcuBpRB6L
 Oq4M7sIrSU8FxRhOt+wBw042R3FWLYkNZ7mYV+VbiC/OXGSnOWj/uhZ04m83B39a
 B0EylS0RIMVkS187+7gVxn5Rcyg0go+/Hi3pdMwBcWFOsVfAPI4Gr7n4F/CI4he5
 lb4B6CMlQR0m1Nsqvvx+s3TUxlnAxuRJ9Kdam2T0emVvNkQTOpBvA6mHsk3WNfrl
 6YE06wkpk29tLGD0a1cKwY4tiQrJ7isi2n/9pCw8NsWVJM2vMMILIBjNWFQ6wKOo
 JnrKe3gjEe/lXN6JuZRZQaP2VkaRO9a86Op7WsPmt5LWAIyRFj0EQMJFay+dhjcl
 N/MpAXzhuNrHGHpuf0X+9caWhLciAZmd3t/CbEaNCbHMlha7S9iFaIChy899gFob
 L8ODwrHGozOQXSJzqOxLgGEos7BQLyrxnurBqe1aU3JHmQXLD32xQA69qTphvRf9
 wlYSVm4eitg5QgGQPgwMilAb51O+3gQkDuas8uUS9LbRcnauhjNw4zabM4L8tOT2
 fW4JhUxxw39fj+/GBtX2
 =ilXy
 -----END PGP SIGNATURE-----

Merge tag 'gfs2-v5.2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fix from Andreas Gruenbacher:
 "A revert for a patch that turned out to be broken"

* tag 'gfs2-v5.2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  Revert "gfs2: Replace gl_revokes with a GLF flag"
2019-06-06 12:33:52 -07:00
Linus Torvalds
5d6b501fe5 overlayfs fixes for 5.2-rc4
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCXPkV+wAKCRDh3BK/laaZ
 PMGyAQDq6ry0bTRPIL52Ek+eRS/pi3bIsH96e22Q6W/NrAQEfwD+NtFZneAW/Tux
 AuKIRWqS7UdqCjLurwMHfR9bOHrBDQI=
 =z7pu
 -----END PGP SIGNATURE-----

Merge tag 'ovl-fixes-5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs

Pull overlayfs fixes from Miklos Szeredi:
 "Here's one fix for a class of bugs triggered by syzcaller, and one
  that makes xfstests fail less"

* tag 'ovl-fixes-5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: doc: add non-standard corner cases
  ovl: detect overlapping layers
  ovl: support the FS_IOC_FS[SG]ETXATTR ioctls
2019-06-06 12:31:15 -07:00
Linus Torvalds
211758573b fuse fixes for 5.2-rc4
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCXPjJMAAKCRDh3BK/laaZ
 PDzlAP9CgHZsgCVfB5afSb9rqY9Fdzr3LxSOwaCXavA5XGJAVQEAhjldnlMOjEvO
 LrDEPG3zziJuQgCmMJ9xXoBYYjkCwgo=
 =nff/
 -----END PGP SIGNATURE-----

Merge tag 'fuse-fixes-5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse fixes from Miklos Szeredi:
 "This fixes a leaked inode lock in an error cleanup path and a data
  consistency issue with copy_file_range().

  It also adds a new flag for the WRITE request that allows userspace
  filesystems to clear suid/sgid bits on the file if necessary"

* tag 'fuse-fixes-5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: extract helper for range writeback
  fuse: fix copy_file_range() in the writeback case
  fuse: add FUSE_WRITE_KILL_PRIV
  fuse: fallocate: fix return with locked inode
2019-06-06 12:25:56 -07:00
Linus Torvalds
459aa077a2 NFS client fixes for Linux 5.2
Stable bugfixes:
 - SUNRPC: Fix regression in umount of a secure mount
 - SUNRPC: Fix a use after free when a server rejects the RPCSEC_GSS credential
 - NFSv4.1: Again fix a race where CB_NOTIFY_LOCK fails to wake a waiter
 - NFSv4.1: Fix bug only first CB_NOTIFY_LOCK is handled
 
 Other bugfixes:
 - xprtrdma: Use struct_size() in kzalloc()
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEnZ5MQTpR7cLU7KEp18tUv7ClQOsFAlz4KzoACgkQ18tUv7Cl
 QOt7OhAAvG+DVZ6V5+q4zvabKgoievlL56Ys4SaAp3+OlxC6VaiyQUDs/6U9C/xH
 dmVbGYWdFXjqJE1JPXxmu0jOdRiZcnhIq+hiHNOK0qZOBCnE5zzZ1r1tdNY0GHQ2
 JOkREqsXsaeUWuO0pCY7JOmzd5aU1XLhg1/8+9Z7gNwamMfwLkEqi7FGtXi+xsGz
 gQVxMJlHsV2F21IKdKS0TJrcqr2okya/MnOQRbbMC2RT/MYNxDrhAPBJ1Shcx3HB
 NlccAn4jhIL0bCPRvFPib6KrO01U0Ye/KECN8j2qHRT4QS2s0dsnnQ6f2tEs9mJ8
 cRTVh1uniF6ZuDxSr6KIIN3mKA9DX2SK83H16ahAaRBLM8dwF+4MIr6gDdtJvsVw
 nY0YDpnAaKFypuCPBV/jFu7fk97hul4ntymJGVeFdlqu/HtWs1Z1iM93DDVJbKr8
 a3AND6woOQ2asvySPo+X66PKt79gofga4C+ZDuMfJax8+K9imqIyforgLrAmd/yL
 sGAlLzenf6fmOB5C1bPTtrFFbs6XiHXMidDGwmm1kOZIDuN+O2TTwc24gyXx0IyJ
 OhmjDn2CKmzS2WVPhetRgurzkdTigJu4PebC421qWSFhxlf/NfghW+rpM9su/hwv
 /r9+bpdjZ8YD5FUJvxsX4NZLr+SWbNTzX/ARNdRFsGr0NLpG/50=
 =rrp/
 -----END PGP SIGNATURE-----

Merge tag 'nfs-for-5.2-2' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client fixes from Anna Schumaker:
 "These are mostly stable bugfixes found during testing, many during the
  recent NFS bake-a-thon.

  Stable bugfixes:
   - SUNRPC: Fix regression in umount of a secure mount
   - SUNRPC: Fix a use after free when a server rejects the RPCSEC_GSS credential
   - NFSv4.1: Again fix a race where CB_NOTIFY_LOCK fails to wake a waiter
   - NFSv4.1: Fix bug only first CB_NOTIFY_LOCK is handled

  Other bugfixes:
   - xprtrdma: Use struct_size() in kzalloc()"

* tag 'nfs-for-5.2-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFSv4.1: Fix bug only first CB_NOTIFY_LOCK is handled
  NFSv4.1: Again fix a race where CB_NOTIFY_LOCK fails to wake a waiter
  SUNRPC: Fix a use after free when a server rejects the RPCSEC_GSS credential
  SUNRPC fix regression in umount of a secure mount
  xprtrdma: Use struct_size() in kzalloc()
2019-06-06 12:19:37 -07:00
Parav Pandit
5715c4dd66 vfio/mdev: Synchronize device create/remove with parent removal
In following sequences, child devices created while removing mdev parent
device can be left out, or it may lead to race of removing half
initialized child mdev devices.

issue-1:
--------
       cpu-0                         cpu-1
       -----                         -----
                                  mdev_unregister_device()
                                    device_for_each_child()
                                      mdev_device_remove_cb()
                                        mdev_device_remove()
create_store()
  mdev_device_create()                   [...]
    device_add()
                                  parent_remove_sysfs_files()

/* BUG: device added by cpu-0
 * whose parent is getting removed
 * and it won't process this mdev.
 */

issue-2:
--------
Below crash is observed when user initiated remove is in progress
and mdev_unregister_driver() completes parent unregistration.

       cpu-0                         cpu-1
       -----                         -----
remove_store()
   mdev_device_remove()
   active = false;
                                  mdev_unregister_device()
                                  parent device removed.
   [...]
   parents->ops->remove()
 /*
  * BUG: Accessing invalid parent.
  */

This is similar race like create() racing with mdev_unregister_device().

BUG: unable to handle kernel paging request at ffffffffc0585668
PGD e8f618067 P4D e8f618067 PUD e8f61a067 PMD 85adca067 PTE 0
Oops: 0000 [#1] SMP PTI
CPU: 41 PID: 37403 Comm: bash Kdump: loaded Not tainted 5.1.0-rc6-vdevbus+ #6
Hardware name: Supermicro SYS-6028U-TR4+/X10DRU-i+, BIOS 2.0b 08/09/2016
RIP: 0010:mdev_device_remove+0xfa/0x140 [mdev]
Call Trace:
 remove_store+0x71/0x90 [mdev]
 kernfs_fop_write+0x113/0x1a0
 vfs_write+0xad/0x1b0
 ksys_write+0x5a/0xe0
 do_syscall_64+0x5a/0x210
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Therefore, mdev core is improved as below to overcome above issues.

Wait for any ongoing mdev create() and remove() to finish before
unregistering parent device.
This continues to allow multiple create and remove to progress in
parallel for different mdev devices as most common case.
At the same time guard parent removal while parent is being accessed by
create() and remove() callbacks.
create()/remove() and unregister_device() are synchronized by the rwsem.

Refactor device removal code to mdev_device_remove_common() to avoid
acquiring unreg_sem of the parent.

Fixes: 7b96953bc6 ("vfio: Mediated device Core driver")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2019-06-06 12:32:37 -06:00
Parav Pandit
26c9e3988e vfio/mdev: Avoid creating sysfs remove file on stale device removal
If device is removal is initiated by two threads as below, mdev core
attempts to create a syfs remove file on stale device.
During this flow, below [1] call trace is observed.

     cpu-0                                    cpu-1
     -----                                    -----
  mdev_unregister_device()
    device_for_each_child
       mdev_device_remove_cb
          mdev_device_remove
                                       user_syscall
                                         remove_store()
                                           mdev_device_remove()
                                        [..]
   unregister device();
                                       /* not found in list or
                                        * active=false.
                                        */
                                          sysfs_create_file()
                                          ..Call trace

Now that mdev core follows correct device removal sequence of the linux
bus model, remove shouldn't fail in normal cases. If it fails, there is
no point of creating a stale file or checking for specific error status.

kernel: WARNING: CPU: 2 PID: 9348 at fs/sysfs/file.c:327
sysfs_create_file_ns+0x7f/0x90
kernel: CPU: 2 PID: 9348 Comm: bash Kdump: loaded Not tainted
5.1.0-rc6-vdevbus+ #6
kernel: Hardware name: Supermicro SYS-6028U-TR4+/X10DRU-i+, BIOS 2.0b
08/09/2016
kernel: RIP: 0010:sysfs_create_file_ns+0x7f/0x90
kernel: Call Trace:
kernel: remove_store+0xdc/0x100 [mdev]
kernel: kernfs_fop_write+0x113/0x1a0
kernel: vfs_write+0xad/0x1b0
kernel: ksys_write+0x5a/0xe0
kernel: do_syscall_64+0x5a/0x210
kernel: entry_SYSCALL_64_after_hwframe+0x49/0xbe

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2019-06-06 12:32:37 -06:00
Paolo Abeni
720f1de402 pktgen: do not sleep with the thread lock held.
Currently, the process issuing a "start" command on the pktgen procfs
interface, acquires the pktgen thread lock and never release it, until
all pktgen threads are completed. The above can blocks indefinitely any
other pktgen command and any (even unrelated) netdevice removal - as
the pktgen netdev notifier acquires the same lock.

The issue is demonstrated by the following script, reported by Matteo:

ip -b - <<'EOF'
	link add type dummy
	link add type veth
	link set dummy0 up
EOF
modprobe pktgen
echo reset >/proc/net/pktgen/pgctrl
{
	echo rem_device_all
	echo add_device dummy0
} >/proc/net/pktgen/kpktgend_0
echo count 0 >/proc/net/pktgen/dummy0
echo start >/proc/net/pktgen/pgctrl &
sleep 1
rmmod veth

Fix the above releasing the thread lock around the sleep call.

Additionally we must prevent racing with forcefull rmmod - as the
thread lock no more protects from them. Instead, acquire a self-reference
before waiting for any thread. As a side effect, running

rmmod pktgen

while some thread is running now fails with "module in use" error,
before this patch such command hanged indefinitely.

Note: the issue predates the commit reported in the fixes tag, but
this fix can't be applied before the mentioned commit.

v1 -> v2:
 - no need to check for thread existence after flipping the lock,
   pktgen threads are freed only at net exit time
 -

Fixes: 6146e6a43b ("[PKTGEN]: Removes thread_{un,}lock() macros.")
Reported-and-tested-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-06-06 11:31:35 -07:00
Linus Torvalds
44e843eb5c As a result of some of Al Viro's great work, here are a few cleanups
with fixes for adfs:
 
 - factor out filename comparison, so we can be sure that adfs_compare()
   (used for namei compare) and adfs_match() (used for lookup) have the
   same behaviour.
 - factor out filename lowering (which is not the same as tolower() which
   will lower top-bit-set characters) to ensure that we have the same
   behaviour when comparing filenames as when we hash them.
 - factor out the object fixups, so we are applying all fixups to
   directory objects in the same way, independent of the disk format.
 - factor out the object name fixup (into the previously factored out
   function) to ensure that filenames are appropriately translated -
   for example, adfs allows '/' in filenames, which being the Unix path
   separator, need to be translated to a different character, which is
   normally '.' (DOS 8.3 filenames represent the . as a / on adfs, so
   this is the expected reverse translation.)
 - remove filename truncation; Al asked about this and apparently the
   decision is to remove it.  In any case, adfs's truncation was buggy,
   so this rids us of that bug by removing the truncation feature.
 - we now have only one location which adds the "filetype" suffix to the
   filename, so there's no point that code being out of line.
 - since we translate '/' into '.', an adfs filename of "/" or "//" would
   end up being translated to "." and ".." which have special meanings.
   In this case, change the first character to "^" to avoid these special
   directory names being abused.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIVAwUAXPD4oPTnkBvkraxkAQK35Q//bql8SDnF9sqy8YlVUmAgoIMdyQtiFuD7
 5UgRBPDl4bIm2Y+mtuYjU/u3nq6tZit0HukybUvD5yA64Opy1Ahkf8OB/f0f6TTU
 xjx55/D9QRj4loGxXHM6PuEO9GX+pIsYPFQoufPYq7hksQB2y1ETkjENk4W4PY2m
 gvbtQqQmz/B+G7PZvrMsZQV/BwYF3vhP8S/qLbgl3PAbciVofruXtPJNRxgOL8ot
 hbOIfT5x30YZpILzXqDZJq4mviWPru+FVJ1uIW1Nd5s8T/9seICxXMjFaMQJUSMn
 oIHCzC1WlP4uRbjwmJ+lyLlEPyYrgYN3+H1FcIO0MTYfBXwYZrVdFLW4TtWBracc
 8bRa+p9jeRe9jdlKpGaX12a4W7xQ3SmB2i8UFE+/epnBqPvuDPOM0h19XK+FclTH
 fAg7Ej1uBC1ROkTlW4OXBsLakXvIIka859DQYQduVKDw8kTSH4QyTdAE7qvOGz/d
 Y0XMeIUz+U1izVJ8ShHCVyttXnkBkC6Xwoc6RY3IET++Fu0hXCMdQMSf6Ta8zJjA
 EUAdb3GLYdJTqX6Oy9NTUd42GPnZwR5KMUOJd6v9ETU7gLDRDyu9ILpgrF+vFaKj
 Xnf7B+D4l1jdB5cU/MYzfzF7Ky80vDHjVr62PSvtb5X9F0pHOINgZJ5an8n80bDc
 dxQq92h9hCI=
 =mQU/
 -----END PGP SIGNATURE-----

Merge tag 'for-rc-adfs' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ADFS cleanups/fixes from Russell King:
 "As a result of some of Al Viro's great work, here are a few cleanups
  with fixes for adfs:

   - factor out filename comparison, so we can be sure that
     adfs_compare() (used for namei compare) and adfs_match() (used for
     lookup) have the same behaviour.

   - factor out filename lowering (which is not the same as tolower()
     which will lower top-bit-set characters) to ensure that we have the
     same behaviour when comparing filenames as when we hash them.

   - factor out the object fixups, so we are applying all fixups to
     directory objects in the same way, independent of the disk format.

   - factor out the object name fixup (into the previously factored out
     function) to ensure that filenames are appropriately translated -
     for example, adfs allows '/' in filenames, which being the Unix
     path separator, need to be translated to a different character,
     which is normally '.' (DOS 8.3 filenames represent the . as a / on
     adfs, so this is the expected reverse translation.)

   - remove filename truncation; Al asked about this and apparently the
     decision is to remove it. In any case, adfs's truncation was buggy,
     so this rids us of that bug by removing the truncation feature.

   - we now have only one location which adds the "filetype" suffix to
     the filename, so there's no point that code being out of line.

   - since we translate '/' into '.', an adfs filename of "/" or "//"
     would end up being translated to "." and ".." which have special
     meanings. In this case, change the first character to "^" to avoid
     these special directory names being abused"

* tag 'for-rc-adfs' of git://git.armlinux.org.uk/~rmk/linux-arm:
  fs/adfs: fix filename fixup handling for "/" and "//" names
  fs/adfs: move append_filetype_suffix() into adfs_object_fixup()
  fs/adfs: remove truncated filename hashing
  fs/adfs: factor out filename fixup
  fs/adfs: factor out object fixups
  fs/adfs: factor out filename case lowering
  fs/adfs: factor out filename comparison
2019-06-06 11:02:54 -07:00
Maxime Chevallier
d37acd5aa9 net: mvpp2: Use strscpy to handle stat strings
Use a safe strscpy call to copy the ethtool stat strings into the
relevant buffers, instead of a memcpy that will be accessing
out-of-bound data.

Fixes: 118d6298f6 ("net: mvpp2: add ethtool GOP statistics")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-06-06 10:38:42 -07:00
Zhu Yanjun
85cb928787 net: rds: fix memory leak in rds_ib_flush_mr_pool
When the following tests last for several hours, the problem will occur.

Server:
    rds-stress -r 1.1.1.16 -D 1M
Client:
    rds-stress -r 1.1.1.14 -s 1.1.1.16 -D 1M -T 30

The following will occur.

"
Starting up....
tsks   tx/s   rx/s  tx+rx K/s    mbi K/s    mbo K/s tx us/c   rtt us cpu
%
  1      0      0       0.00       0.00       0.00    0.00 0.00 -1.00
  1      0      0       0.00       0.00       0.00    0.00 0.00 -1.00
  1      0      0       0.00       0.00       0.00    0.00 0.00 -1.00
  1      0      0       0.00       0.00       0.00    0.00 0.00 -1.00
"
>From vmcore, we can find that clean_list is NULL.

>From the source code, rds_mr_flushd calls rds_ib_mr_pool_flush_worker.
Then rds_ib_mr_pool_flush_worker calls
"
 rds_ib_flush_mr_pool(pool, 0, NULL);
"
Then in function
"
int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool,
                         int free_all, struct rds_ib_mr **ibmr_ret)
"
ibmr_ret is NULL.

In the source code,
"
...
list_to_llist_nodes(pool, &unmap_list, &clean_nodes, &clean_tail);
if (ibmr_ret)
        *ibmr_ret = llist_entry(clean_nodes, struct rds_ib_mr, llnode);

/* more than one entry in llist nodes */
if (clean_nodes->next)
        llist_add_batch(clean_nodes->next, clean_tail, &pool->clean_list);
...
"
When ibmr_ret is NULL, llist_entry is not executed. clean_nodes->next
instead of clean_nodes is added in clean_list.
So clean_nodes is discarded. It can not be used again.
The workqueue is executed periodically. So more and more clean_nodes are
discarded. Finally the clean_list is NULL.
Then this problem will occur.

Fixes: 1bc144b625 ("net, rds, Replace xlist in net/rds/xlist.h with llist")
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-06-06 10:32:16 -07:00