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| author | Xiaoke Wang <xkernel.wang@foxmail.com> | 2021-12-14 05:26:46 +0300 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2022-01-14 00:23:04 +0300 |
| commit | 1c1857d400355e96f0fe8b32adc6fa7594d03b52 (patch) | |
| tree | db24bd4b0bb84ea90d61efd3e8f94e5682967540 /kernel/trace | |
| parent | 8c7224245557707c613f130431cafbaaa4889615 (diff) | |
| download | linux-1c1857d400355e96f0fe8b32adc6fa7594d03b52.tar.xz | |
tracing/probes: check the return value of kstrndup() for pbuf
kstrndup() is a memory allocation-related function, it returns NULL when
some internal memory errors happen. It is better to check the return
value of it so to catch the memory error in time.
Link: https://lkml.kernel.org/r/tencent_4D6E270731456EB88712ED7F13883C334906@qq.com
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: a42e3c4de964 ("tracing/probe: Add immediate string parameter support")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_probe.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 8a3822818bf8..73d90179b51b 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -356,6 +356,8 @@ static int __parse_imm_string(char *str, char **pbuf, int offs) return -EINVAL; } *pbuf = kstrndup(str, len - 1, GFP_KERNEL); + if (!*pbuf) + return -ENOMEM; return 0; } |