* [PATCH] wifi: cfg80211: Fix error pointer dereference in nl80211_dump_station()
@ 2026-10-15 15:18 Ethan Tidmore
0 siblings, 0 replies; only message in thread
From: Ethan Tidmore @ 2026-10-15 15:18 UTC (permalink / raw)
To: Johannes Berg; +Cc: linux-wireless, linux-kernel, Ethan Tidmore
__nl80211_lock_held_wdev() can return an ERR_PTR on failure. If this
happens, 'wdev' holds an error pointer that bypasses the non-NULL
check at 'out_err' and gets passed into wdev_put(), resulting in a
dereference. Clear 'wdev' to NULL before jumping to 'out_err' to
prevent this.
Fixes: 599b8a3c549b ("wifi: cfg80211: support unlocked station get/dump")
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
---
net/wireless/nl80211.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d790e204aee3..739283404531 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -9031,6 +9031,7 @@ static int nl80211_dump_station(struct sk_buff *skb,
wdev);
if (IS_ERR(wdev)) {
err = PTR_ERR(wdev);
+ wdev = NULL;
goto out_err;
}
--
Thanks,
ET
https://github.com/sponsors/ethantidmore
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2026-10-15 15:18 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-10-15 15:18 [PATCH] wifi: cfg80211: Fix error pointer dereference in nl80211_dump_station() Ethan Tidmore
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox