Commit Graph

767645 Commits

Author SHA1 Message Date
Rik van Riel
2ff6ddf19c x86/mm/tlb: Leave lazy TLB mode at page table free time
Andy discovered that speculative memory accesses while in lazy
TLB mode can crash a system, when a CPU tries to dereference a
speculative access using memory contents that used to be valid
page table memory, but have since been reused for something else
and point into la-la land.

The latter problem can be prevented in two ways. The first is to
always send a TLB shootdown IPI to CPUs in lazy TLB mode, while
the second one is to only send the TLB shootdown at page table
freeing time.

The second should result in fewer IPIs, since operationgs like
mprotect and madvise are very common with some workloads, but
do not involve page table freeing. Also, on munmap, batching
of page table freeing covers much larger ranges of virtual
memory than the batching of unmapped user pages.

Tested-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Rik van Riel <riel@surriel.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: efault@gmx.de
Cc: kernel-team@fb.com
Cc: luto@kernel.org
Link: http://lkml.kernel.org/r/20180716190337.26133-3-riel@surriel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-07-17 09:35:31 +02:00
Rik van Riel
c1a2f7f0c0 mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids
The mm_struct always contains a cpumask bitmap, regardless of
CONFIG_CPUMASK_OFFSTACK. That means the first step can be to
simplify things, and simply have one bitmask at the end of the
mm_struct for the mm_cpumask.

This does necessitate moving everything else in mm_struct into
an anonymous sub-structure, which can be randomized when struct
randomization is enabled.

The second step is to determine the correct size for the
mm_struct slab object from the size of the mm_struct
(excluding the CPU bitmap) and the size the cpumask.

For init_mm we can simply allocate the maximum size this
kernel is compiled for, since we only have one init_mm
in the system, anyway.

Pointer magic by Mike Galbraith, to evade -Wstringop-overflow
getting confused by the dynamically sized array.

Tested-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Rik van Riel <riel@surriel.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-team@fb.com
Cc: luto@kernel.org
Link: http://lkml.kernel.org/r/20180716190337.26133-2-riel@surriel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-07-17 09:35:30 +02:00
Ingo Molnar
37c45b2354 Linux 4.18-rc5
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Merge tag 'v4.18-rc5' into x86/mm, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-07-17 09:31:30 +02:00
Linus Torvalds
9d3cce1e8b Linux 4.18-rc5 2018-07-15 12:49:31 -07:00
Linus Torvalds
41b55d23ee ARM: SoC fixes for 4.18-rc
- A fix for OMAP5 and DRA7 to make the branch predictor hardening
    settings take proper effect on secondary cores
  - Disable USB OTG on am3517 since current driver isn't working
  - Fix thermal sensor register settings on Armada 38x
  - Fix suspend/resume IRQs on pxa3xx
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:

 - A fix for OMAP5 and DRA7 to make the branch predictor hardening
   settings take proper effect on secondary cores

 - Disable USB OTG on am3517 since current driver isn't working

 - Fix thermal sensor register settings on Armada 38x

 - Fix suspend/resume IRQs on pxa3xx

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: dts: am3517.dtsi:  Disable reference to OMAP3 OTG controller
  ARM: DRA7/OMAP5: Enable ACTLR[0] (Enable invalidates of BTB) for secondary cores
  ARM: pxa: irq: fix handling of ICMR registers in suspend/resume
  ARM: dts: armada-38x: use the new thermal binding
2018-07-15 09:49:21 -07:00
Linus Torvalds
37b5dca289 RTC fixes for 4.18
- an important core fix for RTCs using the core offsetting only one driver is
 affected.
  - a fix for the error path of mrst
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Merge tag 'rtc-4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC fixes from Alexandre Belloni:
 "Two fixes for 4.18:

   - an important core fix for RTCs using the core offsetting only one
     driver is affected

   - a fix for the error path of mrst"

* tag 'rtc-4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: fix alarm read and set offset
  rtc: mrst: fix error code in probe()
2018-07-14 16:15:19 -07:00
Olof Johansson
13e66ceea1 Two omap fixes for v4.18-rc cycle
Turns out the recent patches for ARM branch predictor hardening are
 not working on omap5 and dra7 as planned because the secondary CPU
 is parked to the bootrom code. We can't configure it in the bootloader.
 So we must enable invalidates of BTB for omap5 and dra7 secondary
 core in the kernel.
 
 And there's a fix for reserved register access for am3517. The
 usb otg module on am3517 is not the same as for other omap3.
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Merge tag 'omap-for-v4.18/fixes-rc4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Two omap fixes for v4.18-rc cycle

Turns out the recent patches for ARM branch predictor hardening are
not working on omap5 and dra7 as planned because the secondary CPU
is parked to the bootrom code. We can't configure it in the bootloader.
So we must enable invalidates of BTB for omap5 and dra7 secondary
core in the kernel.

And there's a fix for reserved register access for am3517. The
usb otg module on am3517 is not the same as for other omap3.

* tag 'omap-for-v4.18/fixes-rc4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: am3517.dtsi:  Disable reference to OMAP3 OTG controller
  ARM: DRA7/OMAP5: Enable ACTLR[0] (Enable invalidates of BTB) for secondary cores

Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-14 15:14:02 -07:00
Olof Johansson
d4f72a70fe mvebu fixes for 4.18 (part 1)
Use the new thermal binding on Armada 38x allowing to use a driver fix
 which is already part of the kernel.
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Merge tag 'mvebu-fixes-4.18-1' of git://git.infradead.org/linux-mvebu into fixes

mvebu fixes for 4.18 (part 1)

Use the new thermal binding on Armada 38x allowing to use a driver fix
which is already part of the kernel.

* tag 'mvebu-fixes-4.18-1' of git://git.infradead.org/linux-mvebu:
  ARM: dts: armada-38x: use the new thermal binding

Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-14 15:12:24 -07:00
Olof Johansson
4dbd2b429a This is the fixes set for v4.18 cycle.
This is a fix for suspending all pxa3xx platforms, where high
 number interrupts are not reenabled.
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Merge tag 'pxa-fixes-4.18' of https://github.com/rjarzmik/linux into fixes

This is the fixes set for v4.18 cycle.

This is a fix for suspending all pxa3xx platforms, where high
number interrupts are not reenabled.

* tag 'pxa-fixes-4.18' of https://github.com/rjarzmik/linux:
  ARM: pxa: irq: fix handling of ICMR registers in suspend/resume

Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-14 15:11:41 -07:00
Linus Torvalds
c31496dbac xen: fixes for 4.18-rc5
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Merge tag 'for-linus-4.18-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "Two related fixes for a boot failure of Xen PV guests"

* tag 'for-linus-4.18-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: setup pv irq ops vector earlier
  xen: remove global bit from __default_kernel_pte_mask for pv guests
2018-07-14 12:30:13 -07:00
Linus Torvalds
2da8c426d9 for-linus-20180713
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Merge tag 'for-linus-20180713' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Just a single regression fix (from 4.17) for bsg, fixing an EINVAL
  return on non-data commands"

* tag 'for-linus-20180713' of git://git.kernel.dk/linux-block:
  bsg: fix bogus EINVAL on non-data commands
2018-07-14 12:28:00 -07:00
Linus Torvalds
f353078f02 Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "11 fixes"

* emailed patches form Andrew Morton <akpm@linux-foundation.org>:
  reiserfs: fix buffer overflow with long warning messages
  checkpatch: fix duplicate invalid vsprintf pointer extension '%p<foo>' messages
  mm: do not bug_on on incorrect length in __mm_populate()
  mm/memblock.c: do not complain about top-down allocations for !MEMORY_HOTREMOVE
  fs, elf: make sure to page align bss in load_elf_library
  x86/purgatory: add missing FORCE to Makefile target
  net/9p/client.c: put refcount of trans_mod in error case in parse_opts()
  mm: allow arch to supply p??_free_tlb functions
  autofs: fix slab out of bounds read in getname_kernel()
  fs/proc/task_mmu.c: fix Locked field in /proc/pid/smaps*
  mm: do not drop unused pages when userfaultd is running
2018-07-14 11:14:33 -07:00
Eric Biggers
fe10e398e8 reiserfs: fix buffer overflow with long warning messages
ReiserFS prepares log messages into a 1024-byte buffer with no bounds
checks.  Long messages, such as the "unknown mount option" warning when
userspace passes a crafted mount options string, overflow this buffer.
This causes KASAN to report a global-out-of-bounds write.

Fix it by truncating messages to the buffer size.

Link: http://lkml.kernel.org/r/20180707203621.30922-1-ebiggers3@gmail.com
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: syzbot+b890b3335a4d8c608963@syzkaller.appspotmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:10 -07:00
Joe Perches
ffe075132a checkpatch: fix duplicate invalid vsprintf pointer extension '%p<foo>' messages
Multiline statements with invalid %p<foo> uses produce multiple
warnings.  Fix that.

e.g.:

$ cat t_block.c
void foo(void)
{
	MY_DEBUG(drv->foo,
		 "%pk",
		 foo->boo);
}

$ ./scripts/checkpatch.pl -f t_block.c
WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#1: FILE: t_block.c:1:
+void foo(void)

WARNING: Invalid vsprintf pointer extension '%pk'
#3: FILE: t_block.c:3:
+	MY_DEBUG(drv->foo,
+		 "%pk",
+		 foo->boo);

WARNING: Invalid vsprintf pointer extension '%pk'
#3: FILE: t_block.c:3:
+	MY_DEBUG(drv->foo,
+		 "%pk",
+		 foo->boo);

total: 0 errors, 3 warnings, 6 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

t_block.c has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Link: http://lkml.kernel.org/r/9e8341bbe4c9877d159cb512bb701043cbfbb10b.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: "Tobin C. Harding" <me@tobin.cc>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:10 -07:00
Michal Hocko
bb177a732c mm: do not bug_on on incorrect length in __mm_populate()
syzbot has noticed that a specially crafted library can easily hit
VM_BUG_ON in __mm_populate

  kernel BUG at mm/gup.c:1242!
  invalid opcode: 0000 [#1] SMP
  CPU: 2 PID: 9667 Comm: a.out Not tainted 4.18.0-rc3 #644
  Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 05/19/2017
  RIP: 0010:__mm_populate+0x1e2/0x1f0
  Code: 55 d0 65 48 33 14 25 28 00 00 00 89 d8 75 21 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 75 18 f1 ff 0f 0b e8 6e 18 f1 ff <0f> 0b 31 db eb c9 e8 93 06 e0 ff 0f 1f 00 55 48 89 e5 53 48 89 fb
  Call Trace:
     vm_brk_flags+0xc3/0x100
     vm_brk+0x1f/0x30
     load_elf_library+0x281/0x2e0
     __ia32_sys_uselib+0x170/0x1e0
     do_fast_syscall_32+0xca/0x420
     entry_SYSENTER_compat+0x70/0x7f

The reason is that the length of the new brk is not page aligned when we
try to populate the it.  There is no reason to bug on that though.
do_brk_flags already aligns the length properly so the mapping is
expanded as it should.  All we need is to tell mm_populate about it.
Besides that there is absolutely no reason to to bug_on in the first
place.  The worst thing that could happen is that the last page wouldn't
get populated and that is far from putting system into an inconsistent
state.

Fix the issue by moving the length sanitization code from do_brk_flags
up to vm_brk_flags.  The only other caller of do_brk_flags is brk
syscall entry and it makes sure to provide the proper length so t here
is no need for sanitation and so we can use do_brk_flags without it.

Also remove the bogus BUG_ONs.

[osalvador@techadventures.net: fix up vm_brk_flags s@request@len@]
Link: http://lkml.kernel.org/r/20180706090217.GI32658@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: syzbot <syzbot+5dcb560fe12aa5091c06@syzkaller.appspotmail.com>
Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Zi Yan <zi.yan@cs.rutgers.edu>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:10 -07:00
Michal Hocko
e3d301cae0 mm/memblock.c: do not complain about top-down allocations for !MEMORY_HOTREMOVE
Mike Rapoport is converting architectures from bootmem to nobootmem
allocator.  While doing so for m68k Geert has noticed that he gets a
scary looking warning:

  WARNING: CPU: 0 PID: 0 at mm/memblock.c:230
  memblock_find_in_range_node+0x11c/0x1be
  memblock: bottom-up allocation failed, memory hotunplug may be affected
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted
  4.18.0-rc3-atari-01343-gf2fb5f2e09a97a3c-dirty #7
  Call Trace: __warn+0xa8/0xc2
    kernel_pg_dir+0x0/0x1000
    netdev_lower_get_next+0x2/0x22
    warn_slowpath_fmt+0x2e/0x36
    memblock_find_in_range_node+0x11c/0x1be
    memblock_find_in_range_node+0x11c/0x1be
    memblock_find_in_range_node+0x0/0x1be
    vprintk_func+0x66/0x6e
    memblock_virt_alloc_internal+0xd0/0x156
    netdev_lower_get_next+0x2/0x22
    netdev_lower_get_next+0x2/0x22
    kernel_pg_dir+0x0/0x1000
    memblock_virt_alloc_try_nid_nopanic+0x58/0x7a
    netdev_lower_get_next+0x2/0x22
    kernel_pg_dir+0x0/0x1000
    kernel_pg_dir+0x0/0x1000
    EXPTBL+0x234/0x400
    EXPTBL+0x234/0x400
    alloc_node_mem_map+0x4a/0x66
    netdev_lower_get_next+0x2/0x22
    free_area_init_node+0xe2/0x29e
    EXPTBL+0x234/0x400
    paging_init+0x430/0x462
    kernel_pg_dir+0x0/0x1000
    printk+0x0/0x1a
    EXPTBL+0x234/0x400
    setup_arch+0x1b8/0x22c
    start_kernel+0x4a/0x40a
    _sinittext+0x344/0x9e8

The warning is basically saying that a top-down allocation can break
memory hotremove because memblock allocation is not movable.  But m68k
doesn't even support MEMORY_HOTREMOVE so there is no point to warn about
it.

Make the warning conditional only to configurations that care.

Link: http://lkml.kernel.org/r/20180706061750.GH32658@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Sam Creasey <sammy@sammy.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:10 -07:00
Oscar Salvador
24962af7e1 fs, elf: make sure to page align bss in load_elf_library
The current code does not make sure to page align bss before calling
vm_brk(), and this can lead to a VM_BUG_ON() in __mm_populate() due to
the requested lenght not being correctly aligned.

Let us make sure to align it properly.

Kees: only applicable to CONFIG_USELIB kernels: 32-bit and configured
for libc5.

Link: http://lkml.kernel.org/r/20180705145539.9627-1-osalvador@techadventures.net
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reported-by: syzbot+5dcb560fe12aa5091c06@syzkaller.appspotmail.com
Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:10 -07:00
Philipp Rudo
fa8cbda88d x86/purgatory: add missing FORCE to Makefile target
- Build the kernel without the fix
- Add some flag to the purgatories KBUILD_CFLAGS,I used
  -fno-asynchronous-unwind-tables
- Re-build the kernel

When you look at makes output you see that sha256.o is not re-build in the
last step.  Also readelf -S still shows the .eh_frame section for
sha256.o.

With the fix sha256.o is rebuilt in the last step.

Without FORCE make does not detect changes only made to the command line
options.  So object files might not be re-built even when they should be.
Fix this by adding FORCE where it is missing.

Link: http://lkml.kernel.org/r/20180704110044.29279-2-prudo@linux.ibm.com
Fixes: df6f2801f5 ("kernel/kexec_file.c: move purgatories sha256 to common code")
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>	[4.17+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:09 -07:00
piaojun
c290fba8c4 net/9p/client.c: put refcount of trans_mod in error case in parse_opts()
In my testing, the second mount will fail after umounting successfully.
The reason is that we put refcount of trans_mod in the correct case
rather than the error case in parse_opts() at last.  That will cause the
refcount decrease to -1, and when we try to get trans_mod again in
try_module_get(), we could only increase refcount to 0 which will cause
failure as follows:

parse_opts
  v9fs_get_trans_by_name
    try_module_get : return NULL to caller which cause error

So we should put refcount of trans_mod in error case.

Link: http://lkml.kernel.org/r/5B3F39A0.2030509@huawei.com
Fixes: 9421c3e641 ("net/9p/client.c: fix potential refcnt problem of trans module")
Signed-off-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Dominique Martinet <dominique.martinet@cea.fr>
Tested-by: Dominique Martinet <dominique.martinet@cea.fr>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:09 -07:00
Nicholas Piggin
a90744bac5 mm: allow arch to supply p??_free_tlb functions
The mmu_gather APIs keep track of the invalidated address range
including the span covered by invalidated page table pages.  Ranges
covered by page tables but not ptes (and therefore no TLBs) still need
to be invalidated because some architectures (x86) can cache
intermediate page table entries, and invalidate those with normal TLB
invalidation instructions to be almost-backward-compatible.

Architectures which don't cache intermediate page table entries, or
which invalidate these caches separately from TLB invalidation, do not
require TLB invalidation range expanded over page tables.

Allow architectures to supply their own p??_free_tlb functions, which
can avoid the __tlb_adjust_range.

Link: http://lkml.kernel.org/r/20180703013131.2807-1-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Aneesh Kumar K. V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:09 -07:00
Tomas Bortoli
02f51d4593 autofs: fix slab out of bounds read in getname_kernel()
The autofs subsystem does not check that the "path" parameter is present
for all cases where it is required when it is passed in via the "param"
struct.

In particular it isn't checked for the AUTOFS_DEV_IOCTL_OPENMOUNT_CMD
ioctl command.

To solve it, modify validate_dev_ioctl(function to check that a path has
been provided for ioctl commands that require it.

Link: http://lkml.kernel.org/r/153060031527.26631.18306637892746301555.stgit@pluto.themaw.net
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
Signed-off-by: Ian Kent <raven@themaw.net>
Reported-by: syzbot+60c837b428dc84e83a93@syzkaller.appspotmail.com
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:09 -07:00
Vlastimil Babka
e70cc2bd57 fs/proc/task_mmu.c: fix Locked field in /proc/pid/smaps*
Thomas reports:
 "While looking around in /proc on my v4.14.52 system I noticed that all
  processes got a lot of "Locked" memory in /proc/*/smaps. A lot more
  memory than a regular user can usually lock with mlock().

  Commit 493b0e9d94 (in v4.14-rc1) seems to have changed the behavior
  of "Locked".

  Before that commit the code was like this. Notice the VM_LOCKED check.

           (vma->vm_flags & VM_LOCKED) ?
                (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);

  After that commit Locked is now the same as Pss:

	  (unsigned long)(mss->pss >> (10 + PSS_SHIFT)));

  This looks like a mistake."

Indeed, the commit has added mss->pss_locked with the correct value that
depends on VM_LOCKED, but forgot to actually use it.  Fix it.

Link: http://lkml.kernel.org/r/ebf6c7fb-fec3-6a26-544f-710ed193c154@suse.cz
Fixes: 493b0e9d94 ("mm: add /proc/pid/smaps_rollup")
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Thomas Lindroth <thomas.lindroth@gmail.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Daniel Colascione <dancol@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:09 -07:00
Christian Borntraeger
bce73e4842 mm: do not drop unused pages when userfaultd is running
KVM guests on s390 can notify the host of unused pages.  This can result
in pte_unused callbacks to be true for KVM guest memory.

If a page is unused (checked with pte_unused) we might drop this page
instead of paging it.  This can have side-effects on userfaultd, when
the page in question was already migrated:

The next access of that page will trigger a fault and a user fault
instead of faulting in a new and empty zero page.  As QEMU does not
expect a userfault on an already migrated page this migration will fail.

The most straightforward solution is to ignore the pte_unused hint if a
userfault context is active for this VMA.

Link: http://lkml.kernel.org/r/20180703171854.63981-1-borntraeger@de.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:11:09 -07:00
Pavel Tatashin
e181ae0c5d mm: zero unavailable pages before memmap init
We must zero struct pages for memory that is not backed by physical
memory, or kernel does not have access to.

Recently, there was a change which zeroed all memmap for all holes in
e820.  Unfortunately, it introduced a bug that is discussed here:

  https://www.spinics.net/lists/linux-mm/msg156764.html

Linus, also saw this bug on his machine, and confirmed that reverting
commit 124049decb ("x86/e820: put !E820_TYPE_RAM regions into
memblock.reserved") fixes the issue.

The problem is that we incorrectly zero some struct pages after they
were setup.

The fix is to zero unavailable struct pages prior to initializing of
struct pages.

A more detailed fix should come later that would avoid double zeroing
cases: one in __init_single_page(), the other one in
zero_resv_unavail().

Fixes: 124049decb ("x86/e820: put !E820_TYPE_RAM regions into memblock.reserved")
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:02:20 -07:00
Linus Torvalds
2db39a2f49 Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:

 - I2C core bugfix regarding bus recovery

 - driver bugfix for the tegra driver

 - typo correction

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: recovery: if possible send STOP with recovery pulses
  i2c: tegra: Fix NACK error handling
  i2c: stu300: use non-archaic spelling of failes
2018-07-13 15:34:29 -07:00
Linus Torvalds
3951dbf232 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
 "A clocksource driver fix and a revert"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: arm_arch_timer: Set arch_mem_timer cpumask to cpu_possible_mask
  Revert "tick: Prefer a lower rating device only if it's CPU local device"
2018-07-13 13:36:36 -07:00
Linus Torvalds
aa0a3247c0 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf tool fixes from Ingo Molnar:
 "Misc tooling fixes: python3 related fixes, gcc8 fix, bashism fixes and
  some other smaller fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf tools: Use python-config --includes rather than --cflags
  perf script python: Fix dict reference counting
  perf stat: Fix --interval_clear option
  perf tools: Fix compilation errors on gcc8
  perf test shell: Prevent temporary editor files from being considered test scripts
  perf llvm-utils: Remove bashism from kernel include fetch script
  perf test shell: Make perf's inet_pton test more portable
  perf test shell: Replace '|&' with '2>&1 |' to work with more shells
  perf scripts python: Add Python 3 support to EventClass.py
  perf scripts python: Add Python 3 support to sched-migration.py
  perf scripts python: Add Python 3 support to Util.py
  perf scripts python: Add Python 3 support to SchedGui.py
  perf scripts python: Add Python 3 support to Core.py
  perf tools: Generate a Python script compatible with Python 2 and 3
2018-07-13 13:33:09 -07:00
Linus Torvalds
75adbd1386 Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fix from Ingo Molnar:
 "Fix a UEFI mixed mode (64-bit kernel on 32-bit UEFI) reboot loop
  regression"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/x86: Fix mixed mode reboot loop by removing pointless call to PciIo->Attributes()
2018-07-13 13:30:21 -07:00
Linus Torvalds
ae4ea3975d Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull rseq fixes from Ingo Molnar:
 "Various rseq ABI fixes and cleanups: use get_user()/put_user(),
  validate parameters and use proper uapi types, etc"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rseq/selftests: cleanup: Update comment above rseq_prepare_unload
  rseq: Remove unused types_32_64.h uapi header
  rseq: uapi: Declare rseq_cs field as union, update includes
  rseq: uapi: Update uapi comments
  rseq: Use get_user/put_user rather than __get_user/__put_user
  rseq: Use __u64 for rseq_cs fields, validate user inputs
2018-07-13 12:50:42 -07:00
Linus Torvalds
4659fc8484 Regression, user visible bugs, and crashing fixes:
- cxgb4 could wrongly fail MR creation due to a typo
 
 - Various crashes if the wrong QP type is mixed in with APIs that expect
   other types
 
 - Syzkaller oops
 
 - Using ERR_PTR and NULL together cases HFI1 to crash in some cases
 
 - mlx5 memory leak in error unwind
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "Things have been quite slow, only 6 RC patches have been sent to the
  list. Regression, user visible bugs, and crashing fixes:

   - cxgb4 could wrongly fail MR creation due to a typo

   - various crashes if the wrong QP type is mixed in with APIs that
     expect other types

   - syzkaller oops

   - using ERR_PTR and NULL together cases HFI1 to crash in some cases

   - mlx5 memory leak in error unwind"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/mlx5: Fix memory leak in mlx5_ib_create_srq() error path
  RDMA/uverbs: Don't fail in creation of multiple flows
  IB/hfi1: Fix incorrect mixing of ERR_PTR and NULL return values
  RDMA/uverbs: Fix slab-out-of-bounds in ib_uverbs_ex_create_flow
  RDMA/uverbs: Protect from attempts to create flows on unsupported QP
  iw_cxgb4: correctly enforce the max reg_mr depth
2018-07-13 12:42:14 -07:00
Linus Torvalds
2a7e1211e1 VFIO fixes for v4.18
- Fix deadlock in mbochs sample driver (Alexey Khoroshilov)
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Merge tag 'vfio-v4.18-rc5' of git://github.com/awilliam/linux-vfio

Pull VFIO fix from Alex Williamson:
 "Fix deadlock in mbochs sample driver (Alexey Khoroshilov)"

* tag 'vfio-v4.18-rc5' of git://github.com/awilliam/linux-vfio:
  sample: vfio-mdev: avoid deadlock in mdev_access()
2018-07-13 12:37:45 -07:00
Linus Torvalds
79facf308f Kbuild fixes for v4.18 (2nd)
- update Kbuild and Kconfig documents
 
  - sanitize -I compiler option handling
 
  - update extract-vmlinux script to recognize LZ4 and ZSTD
 
  - fix tools Makefiles
 
  - update tags.sh to handle __ro_after_init
 
  - suppress warnings in case getconf does not recognize LFS_* parameters
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Merge tag 'kbuild-fixes-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - update Kbuild and Kconfig documents

 - sanitize -I compiler option handling

 - update extract-vmlinux script to recognize LZ4 and ZSTD

 - fix tools Makefiles

 - update tags.sh to handle __ro_after_init

 - suppress warnings in case getconf does not recognize LFS_* parameters

* tag 'kbuild-fixes-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: suppress warnings from 'getconf LFS_*'
  scripts/tags.sh: add __ro_after_init
  tools: build: Use HOSTLDFLAGS with fixdep
  tools: build: Fixup host c flags
  tools build: fix # escaping in .cmd files for future Make
  scripts: teach extract-vmlinux about LZ4 and ZSTD
  kbuild: remove duplicated comments about PHONY
  kbuild: .PHONY is not a variable, but PHONY is
  kbuild: do not drop -I without parameter
  kbuild: document the KBUILD_KCONFIG env. variable
  kconfig: update user kconfig tools doc.
  kbuild: delete INSTALL_FW_PATH from kbuild documentation
  kbuild: update ARCH alias info for sparc
  kbuild: update ARCH alias info for sh
2018-07-13 12:15:12 -07:00
Linus Torvalds
9d2e34897d More arm64 fixes:
- Revert back to the 'linux' target for LD, as 'elf' breaks some distributions
 
 - Fix preemption race when testing whether the vector unit is in use or not
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Catalin's out enjoying the sunshine, so I'm sending the fixes for a
  couple of weeks (although there hopefully won't be any more!).

  We've got a revert of a previous fix because it broke the build with
  some distro toolchains and a preemption fix when detemining whether or
  not the SIMD unit is in use.

  Summary:

   - Revert back to the 'linux' target for LD, as 'elf' breaks some
     distributions

   - Fix preemption race when testing whether the vector unit is in use
     or not"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: neon: Fix function may_use_simd() return error status
  Revert "arm64: Use aarch64elf and aarch64elfb emulation mode variants"
2018-07-13 11:48:34 -07:00
Linus Torvalds
e6ef760731 Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "A couple of small fixes this time around from Steven for an
  interaction between ftrace and kernel read-only protection, and
  Vladimir for nommu"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8780/1: ftrace: Only set kernel memory back to read-only after boot
  ARM: 8775/1: NOMMU: Use instr_sync instead of plain isb in common code
2018-07-13 11:44:12 -07:00
Linus Torvalds
35a84f34cf Joel Fernandes asked to add a feature in tracing that Android had its
own patch internally for. I took it back in 4.13. Now he realizes that
 he had a mistake, and swapped the values from what Android had. This
 means that the old Android tools will break when using a new kernel
 that has the new feature on it.
 
 The options are:
 
  1. To swap it back to what Android wants.
  2. Add a command line option or something to do the swap
  3. Just let Android carry a patch that swaps it back
 
 Since it requires setting a tracing option to enable this anyway,
 I doubt there are other users of this than Android. Thus, I've
 decided to take option 1. If someone else is actually depending on the
 order that is in the kernel, then we will have to revert this change
 and go to option 2 or 3.
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Merge tag 'trace-v4.18-rc3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixlet from Steven Rostedt:
 "Joel Fernandes asked to add a feature in tracing that Android had its
  own patch internally for. I took it back in 4.13. Now he realizes that
  he had a mistake, and swapped the values from what Android had. This
  means that the old Android tools will break when using a new kernel
  that has the new feature on it.

  The options are:

   1. To swap it back to what Android wants.
   2. Add a command line option or something to do the swap
   3. Just let Android carry a patch that swaps it back

  Since it requires setting a tracing option to enable this anyway, I
  doubt there are other users of this than Android. Thus, I've decided
  to take option 1. If someone else is actually depending on the order
  that is in the kernel, then we will have to revert this change and go
  to option 2 or 3"

* tag 'trace-v4.18-rc3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Reorder display of TGID to be after PID
2018-07-13 11:40:11 -07:00
Linus Torvalds
a0092e5ec6 sound fixes for 4.18-rc5
Just a few HD-auio fixes: one fix for a possible mutex deadlock at
 HDMI hotplug handling is somewhat subtle and delicate, while the
 rest are usual device-specific quirks.
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Merge tag 'sound-4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Just a few HD-auio fixes: one fix for a possible mutex deadlock at
  HDMI hotplug handling is somewhat subtle and delicate, while the rest
  are usual device-specific quirks"

* tag 'sound-4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/ca0132: Update a pci quirk device name
  ALSA: hda/ca0132: Add Recon3Di quirk for Gigabyte G1.Sniper Z97
  ALSA: hda/realtek - two more lenovo models need fixup of MIC_LOCATION
  ALSA: hda - Handle pm failure during hotplug
2018-07-13 11:36:46 -07:00
Linus Torvalds
4596f55476 * fix one ensures that a variable passed in by reference to
acpi_nfit_ctl is always set to a value. An incremental patch is provided
 due to notice from testing in -next. The rest of the commits did not
 exhibit issues.
 
 * fix two fixes a return path in nsio_rw_bytes() that was not
 returning "bytes remain" as expected for the function.
 
 * fix three addresses an issue where applications polling on
 scrub-completion for the NVDIMM may falsely wakeup and read the wrong
 state value and cause hang.
 
 * the test unit changed the persistent capability attribute to fix up a broken
 assumption in the unit test infrastructure wrt the 'write_cache' attribute
 
 * An output ratelimit to dev_info is introduced to the dax device
 check_vma() function since this is easily triggered from userspace.
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Merge tag 'libnvdimm-fixes-4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dave Jiang:

 - ensure that a variable passed in by reference to acpi_nfit_ctl is
   always set to a value. An incremental patch is provided due to notice
   from testing in -next. The rest of the commits did not exhibit
   issues.

 - fix a return path in nsio_rw_bytes() that was not returning "bytes
   remain" as expected for the function.

 - address an issue where applications polling on scrub-completion for
   the NVDIMM may falsely wakeup and read the wrong state value and
   cause hang.

 - change the test unit persistent capability attribute to fix up a
   broken assumption in the unit test infrastructure wrt the
   'write_cache' attribute

 - ratelimit dev_info() in the dax device check_vma() function since
   this is easily triggered from userspace

* tag 'libnvdimm-fixes-4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nfit: fix unchecked dereference in acpi_nfit_ctl
  acpi, nfit: Fix scrub idle detection
  tools/testing/nvdimm: advertise a write cache for nfit_test
  acpi/nfit: fix cmd_rc for acpi_nfit_ctl to always return a value
  dev-dax: check_vma: ratelimit dev_info-s
  libnvdimm, pmem: Fix memcpy_mcsafe() return code handling in nsio_rw_bytes()
2018-07-13 10:54:01 -07:00
Alexandre Belloni
fd6792bb02 rtc: fix alarm read and set offset
The offset needs to be added after reading the alarm value.

It also needs to be subtracted after the now < alarm test.

Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-13 10:37:54 +02:00
Juergen Gross
0ce0bba4e5 xen: setup pv irq ops vector earlier
Setting pv_irq_ops for Xen PV domains should be done as early as
possible in order to support e.g. very early printk() usage.

The same applies to xen_vcpu_info_reset(0), as it is needed for the
pv irq ops.

Move the call of xen_setup_machphys_mapping() after initializing the
pv functions as it contains a WARN_ON(), too.

Remove the no longer necessary conditional in xen_init_irq_ops()
from PVH V1 times to make clear this is a PV only function.

Cc: <stable@vger.kernel.org> # 4.14
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2018-07-13 08:23:27 +02:00
Joel Fernandes (Google)
f8494fa3dd tracing: Reorder display of TGID to be after PID
Currently ftrace displays data in trace output like so:

                                       _-----=> irqs-off
                                      / _----=> need-resched
                                     | / _---=> hardirq/softirq
                                     || / _--=> preempt-depth
                                     ||| /     delay
            TASK-PID   CPU    TGID   ||||    TIMESTAMP  FUNCTION
               | |       |      |    ||||       |         |
            bash-1091  [000] ( 1091) d..2    28.313544: sched_switch:

However Android's trace visualization tools expect a slightly different
format due to an out-of-tree patch patch that was been carried for a
decade, notice that the TGID and CPU fields are reversed:

                                       _-----=> irqs-off
                                      / _----=> need-resched
                                     | / _---=> hardirq/softirq
                                     || / _--=> preempt-depth
                                     ||| /     delay
            TASK-PID    TGID   CPU   ||||    TIMESTAMP  FUNCTION
               | |        |      |   ||||       |         |
            bash-1091  ( 1091) [002] d..2    64.965177: sched_switch:

From kernel v4.13 onwards, during which TGID was introduced, tracing
with systrace on all Android kernels will break (most Android kernels
have been on 4.9 with Android patches, so this issues hasn't been seen
yet). From v4.13 onwards things will break.

The chrome browser's tracing tools also embed the systrace viewer which
uses the legacy TGID format and updates to that are known to be
difficult to make.

Considering this, I suggest we make this change to the upstream kernel
and backport it to all Android kernels. I believe this feature is merged
recently enough into the upstream kernel that it shouldn't be a problem.
Also logically, IMO it makes more sense to group the TGID with the
TASK-PID and the CPU after these.

Link: http://lkml.kernel.org/r/20180626000822.113931-1-joel@joelfernandes.org

Cc: jreck@google.com
Cc: tkjos@google.com
Cc: stable@vger.kernel.org
Fixes: 441dae8f2f ("tracing: Add support for display of tgid in trace output")
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-07-12 19:56:25 -04:00
Wolfram Sang
abe41184ab i2c: recovery: if possible send STOP with recovery pulses
I2C clients may misunderstand recovery pulses if they can't read SDA to
bail out early. In the worst case, as a write operation. To avoid that
and if we can write SDA, try to send STOP to avoid the
misinterpretation.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
2018-07-12 23:38:18 +02:00
Linus Torvalds
63f0477716 SPI NOR fixes:
- Fix a timeout in the cadence QSPI controller driver
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Merge tag 'mtd/fixes-for-4.18-rc5' of git://git.infradead.org/linux-mtd

Pull MTD fix from Boris Brezillon:
 "A SPI NOR fix to fix a timeout in the cadence QSPI controller driver"

* tag 'mtd/fixes-for-4.18-rc5' of git://git.infradead.org/linux-mtd:
  mtd: spi-nor: cadence-quadspi: Fix direct mode write timeouts
2018-07-12 09:41:14 -07:00
Masahiro Yamada
6d79a7b424 kbuild: suppress warnings from 'getconf LFS_*'
Suppress warnings for systems that do not recognize LFS_*.

 getconf: no such configuration parameter `LFS_CFLAGS'
 getconf: no such configuration parameter `LFS_LDFLAGS'
 getconf: no such configuration parameter `LFS_LIBS'

Fixes: d7f14c66c2 ("kbuild: Enable Large File Support for hostprogs")
Reported-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2018-07-13 00:48:18 +09:00
Constantine Shulyupin
e23ba825db scripts/tags.sh: add __ro_after_init
Signed-off-by: Constantine Shulyupin <const@MakeLinux.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-13 00:48:18 +09:00
Laura Abbott
8b247a92eb tools: build: Use HOSTLDFLAGS with fixdep
The final link of fixdep uses LDFLAGS but not the existing HOSTLDFLAGS.
Fix this.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-13 00:48:18 +09:00
Laura Abbott
6fdbd824fd tools: build: Fixup host c flags
Commit 0c3b7e4261 ("tools build: Add support for host programs format")
introduced host_c_flags which referenced CHOSTFLAGS. The actual name of the
variable is HOSTCFLAGS. Fix this up.

Fixes: 0c3b7e4261 ("tools build: Add support for host programs format")
Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-13 00:48:17 +09:00
Paul Menzel
9feeb638cd tools build: fix # escaping in .cmd files for future Make
In 2016 GNU Make made a backwards incompatible change to the way '#'
characters were handled in Makefiles when used inside functions or
macros:

http://git.savannah.gnu.org/cgit/make.git/commit/?id=c6966b323811c37acedff05b57

Due to this change, when attempting to run `make prepare' I get a
spurious make syntax error:

    /home/earnest/linux/tools/objtool/.fixdep.o.cmd:1: *** missing separator.  Stop.

When inspecting `.fixdep.o.cmd' it includes two lines which use
unescaped comment characters at the top:

    \# cannot find fixdep (/home/earnest/linux/tools/objtool//fixdep)
    \# using basic dep data

This is because `tools/build/Build.include' prints these '\#'
characters:

    printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
    printf '\# using basic dep data\n\n' >> $(dot-target).cmd;           \

This completes commit 9564a8cf42 ("Kbuild: fix # escaping in .cmd files
for future Make").

Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-13 00:48:17 +09:00
Adam Ford
923847413f ARM: dts: am3517.dtsi: Disable reference to OMAP3 OTG controller
The AM3517 has a different OTG controller location than the OMAP3,
which is included from omap3.dtsi.  This results in a hwmod error.
Since the AM3517 has a different OTG controller address, this patch
disabes one that is isn't available.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2018-07-12 06:57:05 -07:00
Ingo Molnar
6e1d33b24a perf/urgent fixes:
python interface:
 
 - Make 'perf script -g python' generate scripts that are compatible
   with both python 2 and 3 (Jeremy Cline)
 
 - Fix python dictionary reference counting (Janne Huttunen)
 
 - Add python3 support for various python scripts (Jeremy Cline)
 
 - Use python-config --includes rather than --cflags, fixing the build
   on Fedora, where the python 3.7 started adding -flto to what
 
 perf stat:
 
   - Remove needless extra header line in --interval_clear (Jiri Olsa)
   python-config --cflags generate, breaking the perf build (Jeremy Cline)
 
 Build:
 
 - Fix compilation errors on gcc8 (Jiri Olsa)
 
 perf llvm-utils:
 
 - Remove bashism from kernel include fetch script (Kim Phillips)
 
 perf test: (Kim Phillips)
 
 - Replace '|&' with '2>&1 |' to work with more shells
 
 - Make perf's inet_pton test more portable
 
 - Prevent temporary editor files from being considered test scripts
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo-4.18-20180711' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

python interface fixes:

- Make 'perf script -g python' generate scripts that are compatible
  with both python 2 and 3 (Jeremy Cline)

- Fix python dictionary reference counting (Janne Huttunen)

- Add python3 support for various python scripts (Jeremy Cline)

- Use python-config --includes rather than --cflags, fixing the build
  on Fedora, where the python 3.7 started adding -flto to what

perf stat fixes:

  - Remove needless extra header line in --interval_clear (Jiri Olsa)
  python-config --cflags generate, breaking the perf build (Jeremy Cline)

Build fixes:

- Fix compilation errors on gcc8 (Jiri Olsa)

perf llvm-utils fixes:

- Remove bashism from kernel include fetch script (Kim Phillips)

perf test fixes: (Kim Phillips)

- Replace '|&' with '2>&1 |' to work with more shells

- Make perf's inet_pton test more portable

- Prevent temporary editor files from being considered test scripts

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-07-12 15:52:35 +02:00
Nishanth Menon
2f8b5b2183 ARM: DRA7/OMAP5: Enable ACTLR[0] (Enable invalidates of BTB) for secondary cores
Call secure services to enable ACTLR[0] (Enable invalidates of BTB with
ICIALLU) when branch hardening is enabled for kernel.

On GP devices OMAP5/DRA7, there is no possibility to update secure
side since "secure world" is ROM and there are no override mechanisms
possible. On HS devices, appropriate PPA should do the workarounds as
well.

However, the configuration is only done for secondary core, since it is
expected that firmware/bootloader will have enabled the required
configuration for the primary boot core (note: bootloaders typically
will NOT enable secondary processors, since it has no need to do so).

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2018-07-12 03:56:32 -07:00