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From: Oleg Nesterov on 3 Jun 2010 17:40
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(a)redhat.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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