WARNING: lock held when returning to user space in ieee80211_change_mac

Status: fixed on 2023/02/24 13:50
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+4ef359e6b423499fa4e1@syzkaller.appspotmail.com
Fix commit: ceb3d688f922 wifi: mac80211: unlock on error in ieee80211_can_powered_addr_change()
First crash: 1397d, last: 1397d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac 2 (3) 2022/10/03 08:00

Sample crash report:
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WARNING: lock held when returning to user space!
6.0.0-rc6-syzkaller-01407-g6627a2074d5c #0 Not tainted
------------------------------------------------
syz-executor.3/10164 is leaving the kernel with locks still held!
1 lock held by syz-executor.3/10164:
 #0: ffff888147acaa88 (&local->mtx){+.+.}-{3:3}, at: ieee80211_can_powered_addr_change net/mac80211/iface.c:217 [inline]
 #0: ffff888147acaa88 (&local->mtx){+.+.}-{3:3}, at: ieee80211_change_mac+0x9b4/0xf40 net/mac80211/iface.c:264

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/09/27 13:36 net-next-old 6627a2074d5c 87840e00 .config console log report info ci-upstream-net-kasan-gce WARNING: lock held when returning to user space in ieee80211_change_mac
* Struck through repros no longer work on HEAD.