Messages in this thread Patch in this message | | | From | xkernel.wang@foxmail ... | Subject | [PATCH] tracing: check the return value of kstrndup() | Date | Tue, 14 Dec 2021 10:26:46 +0800 |
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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.
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com> --- 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 3ed2a3f..bb4605b 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; } --
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