From e96271f3ed7e702fa36dd0605c0c5b5f065af816 Mon Sep 17 00:00:00 2001 From: Alexander Shishkin Date: Fri, 18 Nov 2016 13:38:43 +0200 Subject: [PATCH] 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 Tested-by: Vince Weaver Signed-off-by: Alexander Shishkin Acked-by: Peter Zijlstra (Intel) Cc: Arnaldo Carvalho de Melo Cc: Linus Torvalds Cc: Thomas Gleixner 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 --- kernel/events/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/events/core.c b/kernel/events/core.c index ff230bb4a02e..6ee1febdf6ff 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -8029,6 +8029,7 @@ restart: * if is not specified, the range is treated as a single address. */ enum { + IF_ACT_NONE = -1, IF_ACT_FILTER, IF_ACT_START, IF_ACT_STOP, @@ -8052,6 +8053,7 @@ static const match_table_t if_tokens = { { IF_SRC_KERNEL, "%u/%u" }, { IF_SRC_FILEADDR, "%u@%s" }, { IF_SRC_KERNELADDR, "%u" }, + { IF_ACT_NONE, NULL }, }; /* -- 2.30.2