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

Message ID 20210330163705.8061-1-alaaemadhossney.ae@gmail.com
State New
Headers show
Series
  • [v2] wireless/nl80211.c: fix uninitialized variable
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Commit Message

Alaa Emad March 30, 2021, 4:37 p.m.
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@syzkaller.appspotmail.com
Signed-off-by: Alaa Emad <alaaemadhossney.ae@gmail.com>
---
Changes in v2:
  - Make the commit message more clearer.
---
 net/wireless/nl80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

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,