[PATCH v2] wireless/nl80211.c: fix uninitialized variable

From: Alaa Emad
Date: Tue Mar 30 2021 - 12:38:01 EST


This change fix KMSAN uninit-value in net/wireless/nl80211.c:225 , That
because of `fixedlen` variable uninitialized,So I initialized it by zero.

Reported-by: syzbot+72b99dcf4607e8c770f3@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alaa Emad <alaaemadhossney.ae@xxxxxxxxx>
---
Changes in v2:
- Make the commit message more clearer.
---
net/wireless/nl80211.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 775d0c4d86c3..b87ab67ad33d 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -210,7 +210,7 @@ static int validate_beacon_head(const struct nlattr *attr,
const struct element *elem;
const struct ieee80211_mgmt *mgmt = (void *)data;
bool s1g_bcn = ieee80211_is_s1g_beacon(mgmt->frame_control);
- unsigned int fixedlen, hdrlen;
+ unsigned int fixedlen = 0 , hdrlen;

if (s1g_bcn) {
fixedlen = offsetof(struct ieee80211_ext,
--
2.25.1