syzbot


WARNING in cfg80211_switch_netns

Status: upstream: reported on 2025/07/21 07:55
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+3515319a302224e081b4@syzkaller.appspotmail.com
First crash: 47d, last: 6d22h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wireless?] WARNING in cfg80211_switch_netns 0 (1) 2025/07/21 07:55

Sample crash report:
bond0 (unregistering): Released all slaves
bond1 (unregistering): Released all slaves
bond2 (unregistering): Released all slaves
tipc: Left network mode
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7017 at net/wireless/core.c:204 cfg80211_switch_netns+0x58a/0x5b0 net/wireless/core.c:204
Modules linked in:
CPU: 1 UID: 0 PID: 7017 Comm: kworker/u8:21 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:cfg80211_switch_netns+0x58a/0x5b0 net/wireless/core.c:204
Code: e1 07 38 c1 7c 8c 4c 89 e7 e8 a2 95 5a f7 eb 82 e8 5b 2a f7 f6 e9 63 fe ff ff e8 51 2a f7 f6 e9 59 fe ff ff e8 47 2a f7 f6 90 <0f> 0b 90 e9 7f fd ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a1 fa
RSP: 0018:ffffc9000b7bf860 EFLAGS: 00010293
RAX: ffffffff8ac880e9 RBX: ffff888079910d80 RCX: ffff888078699e00
RDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000
RBP: 00000000ffffffef R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: ffff888079910700
R13: ffff8880523dc2e0 R14: dffffc0000000000 R15: ffff8880799108f0
FS:  0000000000000000(0000) GS:ffff888125d1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4df79f84c0 CR3: 000000000df36000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 cfg80211_pernet_exit+0xa2/0x140 net/wireless/core.c:1671
 ops_exit_list net/core/net_namespace.c:198 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:251
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/29 19:05 net-next 29828b81a46a 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/08/25 22:55 net-next 992e9f53a0db bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/08/18 03:23 net-next bab3ce404553 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/08/17 15:49 net-next bab3ce404553 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/08/12 15:20 net-next bc4c0a48bdad c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/08/09 01:30 net-next 37816488247d 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/07/23 15:20 net-next 56613001dfc9 e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
2025/07/20 16:52 net-next 4701ee5044fb 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg80211_switch_netns
* Struck through repros no longer work on HEAD.