WARNING: lock held when returning to user space in cfg80211_wext_siwgenie

Status: upstream: reported C repro on 2026/10/03 12:20
Reported-by: syzbot+516663279b40dfd4a718@syzkaller.appspotmail.com
First crash: 14d, last: 2h03m
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 WARNING: lock held when returning to user space in cfg80211_wext_siwgenie 4 syz, C 20 57m 14d 0/2 upstream: reported C repro on 2026/10/03 19:35
linux-5.15 WARNING: lock held when returning to user space in cfg80211_wext_siwgenie origin:lts-only 4 syz, C 29 40m 14d 0/3 upstream: reported C repro on 2026/10/03 12:26

Sample crash report:
================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.0.17/4463 is leaving the kernel with locks still held!
1 lock held by syz.0.17/4463:
 #0: ffff888027e94d40 (&wdev->mtx){+.+.}-{3:3}, at: wdev_lock net/wireless/core.h:231 [inline]
 #0: ffff888027e94d40 (&wdev->mtx){+.+.}-{3:3}, at: cfg80211_wext_siwgenie+0xd4/0x3f0 net/wireless/wext-sme.c:340

Crashes (31):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/17 17:35 linux-6.1.y 79807e970724 432c0077 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/10 15:29 linux-6.1.y a500ba24937a 4f92358f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 14:26 linux-6.1.y a500ba24937a b2734a59 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/04 02:16 linux-6.1.y a500ba24937a 57bbd979 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/17 22:37 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/17 22:37 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/17 22:34 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/17 22:34 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/17 22:34 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/17 10:20 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/15 21:05 linux-6.1.y 79807e970724 3f2522c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/15 10:44 linux-6.1.y a500ba24937a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/10 05:12 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/10 05:11 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/10 05:08 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/10 05:08 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/10 04:50 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 13:54 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 13:54 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 13:48 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 13:25 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 13:25 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 10:01 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/09 09:59 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/08 17:42 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/05 20:05 linux-6.1.y a500ba24937a af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/05 20:05 linux-6.1.y a500ba24937a af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/04 20:20 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/04 20:20 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/03 12:19 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
2026/10/03 12:19 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: lock held when returning to user space in cfg80211_wext_siwgenie
* Struck through repros no longer work on HEAD.