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9c69a13205
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Jonathan Lemon 9c69a13205 route: Avoid crash from dereferencing NULL rt->from 
When __ip6_rt_update_pmtu() is called, rt->from is RCU dereferenced, but is
never checked for null - rt6_flush_exceptions() may have removed the entry.

[ 1913.989004] RIP: 0010:ip6_rt_cache_alloc+0x13/0x170
[ 1914.209410] Call Trace:
[ 1914.214798]  <IRQ>
[ 1914.219226]  __ip6_rt_update_pmtu+0xb0/0x190
[ 1914.228649]  ip6_tnl_xmit+0x2c2/0x970 [ip6_tunnel]
[ 1914.239223]  ? ip6_tnl_parse_tlv_enc_lim+0x32/0x1a0 [ip6_tunnel]
[ 1914.252489]  ? __gre6_xmit+0x148/0x530 [ip6_gre]
[ 1914.262678]  ip6gre_tunnel_xmit+0x17e/0x3c7 [ip6_gre]
[ 1914.273831]  dev_hard_start_xmit+0x8d/0x1f0
[ 1914.283061]  sch_direct_xmit+0xfa/0x230
[ 1914.291521]  __qdisc_run+0x154/0x4b0
[ 1914.299407]  net_tx_action+0x10e/0x1f0
[ 1914.307678]  __do_softirq+0xca/0x297
[ 1914.315567]  irq_exit+0x96/0xa0
[ 1914.322494]  smp_apic_timer_interrupt+0x68/0x130
[ 1914.332683]  apic_timer_interrupt+0xf/0x20
[ 1914.341721]  </IRQ>

Fixes: a68886a691 ("net/ipv6: Make from in rt6_info rcu protected")
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-15 13:31:59 -07:00
arch xtensa fixes for v5.1-rc5 2019-04-08 17:04:42 -10:00
block block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
certs kexec, KEYS: Make use of platform keyring for signature verify 2019-02-04 17:34:07 -05:00
crypto lib/lzo: separate lzo-rle from lzo 2019-03-07 18:32:03 -08:00
Documentation rxrpc: Make rxrpc_kernel_check_life() indicate if call completed 2019-04-12 16:57:23 -07:00
drivers bonding: fix event handling for stacked bonds 2019-04-15 13:22:09 -07:00
fs afs: Check for rxrpc call completion in wait loop 2019-04-12 16:57:23 -07:00
include rxrpc: Make rxrpc_kernel_check_life() indicate if call completed 2019-04-12 16:57:23 -07:00
init init/main: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
ipc Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
kernel Merge branch 'akpm' (patches from Andrew) 2019-04-05 17:08:55 -10:00
lib Merge branch 'akpm' (patches from Andrew) 2019-04-05 17:08:55 -10:00
LICENSES LICENSES: Add GCC runtime library exception text 2019-01-16 14:54:15 -07:00
mm slab: fix a crash by reading /proc/slab_allocators 2019-04-07 19:23:12 -10:00
net route: Avoid crash from dereferencing NULL rt->from 2019-04-15 13:31:59 -07:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-03-11 08:54:01 -07:00
scripts fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock 2019-04-06 07:01:55 -10:00
security KEYS: trusted: fix -Wvarags warning 2019-04-08 15:58:54 -07:00
sound sound fixes for 5.1-rc3 2019-03-29 14:53:33 -07:00
tools selftests: fib_tests: Fix 'Command line is not complete' errors 2019-04-11 14:17:59 -07:00
usr user/Makefile: Fix typo and capitalization in comment section 2018-12-11 00:18:03 +09:00
virt KVM/ARM fixes for 5.1 2019-03-28 19:07:30 +01:00
.clang-format Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:43:42 -07:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: Add support for DT binding schema checks 2018-12-13 09:41:32 -06:00
.mailmap Update Nicolas Pitre's email address 2019-04-02 18:12:44 -10:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
Kbuild Kbuild updates for v5.1 2019-03-10 17:48:21 -07:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS MAINTAINERS: normalize Woojung Huh's email address 2019-04-15 13:25:03 -07:00
Makefile Linux 5.1-rc4 2019-04-07 14:09:59 -10:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.