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tracing/probes: check the return value of kstrndup() for pbuf

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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: a42e3c4de9 ("tracing/probe: Add immediate string parameter support")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Xiaoke Wang 2021-12-14 10:26:46 +08:00 committed by Steven Rostedt
parent 8c72242455
commit 1c1857d400
1 changed files with 2 additions and 0 deletions
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2
kernel/trace/trace_probe.c
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@ -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;
}