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tracing/filters: strloc should be unsigned short 

I forgot to update filter code accordingly in
"tracing/events: change the type of __str_loc_item to unsigned short"
(commt b0aae68cc5)

It can cause system crash:

 # echo 1 > tracing/events/irq/irq_handler_entry/enable
 # echo 'name == eth0' > tracing/events/irq/irq_handler_entry/filter

[ Impact: fix crash while filtering on __string() field ]

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4A35B905.3090500@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Li Zefan 2009-06-15 10:59:17 +08:00 committed by Steven Rostedt
parent 5e4904cb63
commit 0ac2058f68
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_events_filter.c
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@ -178,7 +178,7 @@ static int filter_pred_string(struct filter_pred *pred, void *event,
static int filter_pred_strloc(struct filter_pred *pred, void *event,
int val1, int val2)
{
int str_loc = *(int *)(event + pred->offset);
unsigned short str_loc = *(unsigned short *)(event + pred->offset);
char *addr = (char *)(event + str_loc);
int cmp, match;