syzbot


WARNING in ieee80211_set_active_links (2)

Status: upstream: reported on 2025/08/29 02:42
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+ab36888b82c02205065e@syzkaller.appspotmail.com
First crash: 4d18h, last: 4d18h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wireless?] WARNING in ieee80211_set_active_links (2) 0 (1) 2025/08/29 02:42
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_set_active_links wireless -1 C 2 224d 242d 28/29 fixed on 2025/05/06 15:33

Sample crash report:
------------[ cut here ]------------
wlan0: Failed check-sdata-in-driver check, flags: 0x0
WARNING: CPU: 0 PID: 21522 at net/mac80211/driver-ops.h:1723 drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline]
WARNING: CPU: 0 PID: 21522 at net/mac80211/driver-ops.h:1723 ieee80211_set_active_links+0x2d5/0x9d0 net/mac80211/link.c:600
Modules linked in:
CPU: 0 UID: 0 PID: 21522 Comm: kworker/u10:0 Tainted: G     U              syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline]
RIP: 0010:ieee80211_set_active_links+0x2d5/0x9d0 net/mac80211/link.c:600
Code: 74 24 08 48 81 c6 20 01 00 00 48 89 74 24 08 e8 91 13 b5 f6 8b 54 24 04 48 8b 74 24 08 48 c7 c7 20 eb 08 8d e8 0c 0c 74 f6 90 <0f> 0b 90 90 e8 72 13 b5 f6 4c 89 e2 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90003c3fb00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888143bda9d0 RCX: ffffffff817a02c8
RDX: ffff888079fa3c00 RSI: ffffffff817a02d5 RDI: 0000000000000001
RBP: 000000000000000a R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: fffffffffffdf818 R12: ffff888143bd9728
R13: 0000000000000000 R14: ffff8880280e0e40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881246c3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001f2000 CR3: 0000000056f24000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ieee80211_if_parse_active_links+0xbb/0x120 net/mac80211/debugfs_netdev.c:733
 wiphy_locked_debugfs_write_work+0xe6/0x1c0 net/wireless/debugfs.c:215
 cfg80211_wiphy_work+0x2c7/0x580 net/wireless/core.c:435
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/25 02:31 upstream 69fd6b99b8f8 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in ieee80211_set_active_links
* Struck through repros no longer work on HEAD.