aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLi Zefan <lizf@cn.fujitsu.com>2009-05-15 11:07:56 +0800
committerSteven Rostedt <rostedt@goodmis.org>2009-05-14 23:55:12 -0400
commit5872144f64b34a5942f6b4acedc90b02de72c58b (patch)
tree65ab10576155c05d7ac319197896a31721f61499
parent8cd995b6deedf98b7694ed32a786ee7f793d1eec (diff)
tracing/filters: fix off-by-one bug
We should leave the last slot for the ending '\0'. [ Impact: fix possible crash when the length of an operand is 128 ] Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4A0CDC8C.30602@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
-rw-r--r--kernel/trace/trace_events_filter.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 22c29984fe0..a7430b16d24 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -736,7 +736,7 @@ static inline void clear_operand_string(struct filter_parse_state *ps)
static inline int append_operand_char(struct filter_parse_state *ps, char c)
{
- if (ps->operand.tail == MAX_FILTER_STR_VAL)
+ if (ps->operand.tail == MAX_FILTER_STR_VAL - 1)
return -EINVAL;
ps->operand.string[ps->operand.tail++] = c;