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authorLv Ruyi <lv.ruyi@zte.com.cn>2022-03-29 10:40:04 +0000
committerSteven Rostedt (Google) <rostedt@goodmis.org>2022-04-02 08:40:09 -0400
commitbed5b60bf67ccd8957b8c0558fead30c4a3f5d3f (patch)
treec446bf231deeaa6a80c29fe4fe3dbfbe0ab37090 /fs/proc
parent84055411d861d3a2b485ad629fce7d2179d72c1e (diff)
proc: bootconfig: Add null pointer check
kzalloc is a memory allocation function which can return NULL when some internal memory errors happen. It is safer to add null pointer check. Link: https://lkml.kernel.org/r/20220329104004.2376879-1-lv.ruyi@zte.com.cn Cc: stable@vger.kernel.org Fixes: c1a3c36017d4 ("proc: bootconfig: Add /proc/bootconfig to show boot config list") Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/bootconfig.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/proc/bootconfig.c b/fs/proc/bootconfig.c
index 6d8d4bf20837..2e244ada1f97 100644
--- a/fs/proc/bootconfig.c
+++ b/fs/proc/bootconfig.c
@@ -32,6 +32,8 @@ static int __init copy_xbc_key_value_list(char *dst, size_t size)
int ret = 0;
key = kzalloc(XBC_KEYLEN_MAX, GFP_KERNEL);
+ if (!key)
+ return -ENOMEM;
xbc_for_each_key_value(leaf, val) {
ret = xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX);