Messages in this thread Patch in this message | | | Date | Tue, 11 Jan 2022 12:30:40 -0500 | From | Steven Rostedt <> | Subject | [for-next][PATCH 09/31] tracing/probes: check the return value of kstrndup() for pbuf |
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From: Xiaoke Wang <xkernel.wang@foxmail.com>
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> --- kernel/trace/trace_probe.c | 2 ++ 1 file changed, 2 insertions(+)
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; } -- 2.33.0
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