Similar to commit<1bd54d85>,kgdbts_option_setup does not check input argument
before passing it to strlen. The argument would be a NULL pointer.
Signed-off-by: Defang Bo <bodef...@126.com>
---
drivers/misc/kgdbts.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c
index 945701b..99d9795 100644
--- a/drivers/misc/kgdbts.c
+++ b/drivers/misc/kgdbts.c
@@ -1057,6 +1057,11 @@ static void kgdbts_run_tests(void)
static int kgdbts_option_setup(char *opt)
{
+ if (!opt) {
+ pr_err("kgdbts: config string not provided\n");
+ return -EINVAL;
+ }
+
if (strlen(opt) >= MAX_CONFIG_LEN) {
printk(KERN_ERR "kgdbts: config string too long\n");
return -ENOSPC;
--
2.7.4
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