From: Xiaoke Wang Date: Tue, 14 Dec 2021 02:26:46 +0000 (+0800) Subject: tracing/probes: check the return value of kstrndup() for pbuf X-Git-Tag: v5.17-rc1~71^2~23 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1c1857d400355e96f0fe8b32adc6fa7594d03b52;p=thirdparty%2Fkernel%2Flinux.git 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 Fixes: a42e3c4de964 ("tracing/probe: Add immediate string parameter support") Signed-off-by: Xiaoke Wang Signed-off-by: Steven Rostedt --- diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 8a3822818bf88..73d90179b51bd 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; }