linux-kernel - [PATCH 2.6.35/stable] TP_STORE_SIGINFO(SEND_SIG

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Message-ID: <20100603213409.GA8307@redhat.com>
Date:	Thu, 3 Jun 2010 23:34:09 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Jason Baron <jbaron@...hat.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH 2.6.35/stable] TP_STORE_SIGINFO(SEND_SIG_FORCED) == OOPS

BUG: unable to handle kernel NULL pointer dereference at 0000000000000006
IP: [<ffffffff8107bd37>] ftrace_raw_event_signal_generate+0x87/0x140

TP_STORE_SIGINFO() forgets about SEND_SIG_FORCED, fix.

We should probably export is_si_special() and change TP_STORE_SIGINFO()
to use it.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---

 include/trace/events/signal.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- 34-rc1/include/trace/events/signal.h~TP_STORE_SIGINFO	2009-12-18 19:05:38.000000000 +0100
+++ 34-rc1/include/trace/events/signal.h	2010-06-03 23:24:07.000000000 +0200
@@ -10,7 +10,8 @@
 
 #define TP_STORE_SIGINFO(__entry, info)				\
 	do {							\
-		if (info == SEND_SIG_NOINFO) {			\
+		if (info == SEND_SIG_NOINFO ||			\
+		    info == SEND_SIG_FORCED) {			\
 			__entry->errno	= 0;			\
 			__entry->code	= SI_USER;		\
 		} else if (info == SEND_SIG_PRIV) {		\

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