]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
perf/core: Fix address filter parser
authorAlexander Shishkin <alexander.shishkin@linux.intel.com>
Fri, 18 Nov 2016 11:38:43 +0000 (13:38 +0200)
committerIngo Molnar <mingo@kernel.org>
Mon, 21 Nov 2016 10:28:36 +0000 (11:28 +0100)
commite96271f3ed7e702fa36dd0605c0c5b5f065af816
tree06a8a4bb58ff3d0700ce8b224c2282bbf79247f0
parente40ed1542dd779e5037a22c6b534e57127472365
perf/core: Fix address filter parser

The token table passed into match_token() must be null-terminated, which
it currently is not in the perf's address filter string parser, as caught
by Vince's perf_fuzzer and KASAN.

It doesn't blow up otherwise because of the alignment padding of the table
to the next element in the .rodata, which is luck.

Fixing by adding a null-terminator to the token table.

Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Tested-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dvyukov@google.com
Cc: stable@vger.kernel.org # v4.7+
Fixes: 375637bc524 ("perf/core: Introduce address range filtering")
Link: http://lkml.kernel.org/r/877f81f264.fsf@ashishki-desk.ger.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/events/core.c