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Message-Id: <1324468136-3997-3-git-send-email-jolsa@redhat.com> Date: Wed, 21 Dec 2011 12:48:50 +0100 From: Jiri Olsa <jolsa@...hat.com> To: rostedt@...dmis.org, fweisbec@...il.com, mingo@...hat.com, paulus@...ba.org, acme@...stprotocols.net, a.p.zijlstra@...llo.nl Cc: linux-kernel@...r.kernel.org, aarapov@...hat.com, Jiri Olsa <jolsa@...hat.com> Subject: [PATCH 2/8] ftrace: Fix possible NULL dereferencing in __ftrace_hash_rec_update We need to check the existence of the other_hash before we touch its count variable. This issue is hit only when non global ftrace_ops is used. The global ftrace_ops is initialized with empty hashes. Signed-off-by: Jiri Olsa <jolsa@...hat.com> --- kernel/trace/ftrace.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 09007c0..7eb702f 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1372,7 +1372,8 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops, if (filter_hash && in_hash && !in_other_hash) match = 1; else if (!filter_hash && in_hash && - (in_other_hash || !other_hash->count)) + (in_other_hash || + !other_hash || !other_hash->count)) match = 1; } if (!match) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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