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| author | Li Zefan <lizf@cn.fujitsu.com> | 2009-04-11 15:52:35 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-12 11:59:28 +0200 |
| commit | bcabd91c271e50eebc0cb9220ac92700332b452e (patch) | |
| tree | 5513a154d06b4ad1737e6787feeab5d2573f2c43 /kernel/trace | |
| parent | 8433a40eb7f2c4883ad57f9900f63e4d59240eb7 (diff) | |
| download | linux-bcabd91c271e50eebc0cb9220ac92700332b452e.tar.gz linux-bcabd91c271e50eebc0cb9220ac92700332b452e.tar.bz2 linux-bcabd91c271e50eebc0cb9220ac92700332b452e.zip | |
tracing/filters: fix NULL pointer dereference
Try this, and you'll see NULL pointer dereference bug:
# echo -n 'parent_comm ==' > sched/sched_process_fork/filter
Because we passed NULL ptr to simple_strtoull().
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <49E04C43.1050504@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 026be412f356..9d2162fd2305 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -410,6 +410,11 @@ int filter_parse(char **pbuf, struct filter_pred *pred) } } + if (!val_str) { + pred->field_name = NULL; + return -EINVAL; + } + pred->field_name = kstrdup(pred->field_name, GFP_KERNEL); if (!pred->field_name) return -ENOMEM; |