From: syzbot <syzbot+582469b3a9ef5f13606b@syzkaller.appspotmail.com>
To: johannes@sipsolutions.net, linux-kernel@vger.kernel.org,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: [syzbot] [wireless?] WARNING in ieee80211_set_active_links (3)
Date: Wed, 25 Feb 2026 19:22:32 -0800 [thread overview]
Message-ID: <699fbc78.050a0220.1cd54b.000b.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 7dff99b35460 Remove WARN_ALL_UNSEEDED_RANDOM kernel config..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=113428d6580000
kernel config: https://syzkaller.appspot.com/x/.config?x=af6ed0125ed44356
dashboard link: https://syzkaller.appspot.com/bug?extid=582469b3a9ef5f13606b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/45c7b6686727/disk-7dff99b3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/36fcc9cd6296/vmlinux-7dff99b3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fe952fd2745b/bzImage-7dff99b3.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+582469b3a9ef5f13606b@syzkaller.appspotmail.com
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
------------[ cut here ]------------
wlan0: Failed check-sdata-in-driver check, flags: 0x0
WARNING: net/mac80211/driver-ops.h:1723 at drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline], CPU#0: kworker/u10:3/11668
WARNING: net/mac80211/driver-ops.h:1723 at ieee80211_set_active_links+0x2d0/0x9d0 net/mac80211/link.c:595, CPU#0: kworker/u10:3/11668
Modules linked in:
CPU: 0 UID: 0 PID: 11668 Comm: kworker/u10:3 Tainted: G U L syzkaller #0 PREEMPT(full)
Tainted: [U]=USER, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0x2d7/0x9d0 net/mac80211/link.c:595
Code: 06 00 00 e8 fb 8e 05 f7 48 8b 34 24 48 81 c6 20 01 00 00 48 89 34 24 e8 e7 8e 05 f7 48 8d 3d 20 ef e7 05 48 8b 34 24 44 89 fa <67> 48 0f b9 3a e9 e0 fe ff ff e8 ca 8e 05 f7 0f b7 c5 4c 8d bb 30
RSP: 0018:ffffc90004947af0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888029d2aa90 RCX: ffffffff8b026bfe
RDX: 0000000000000000 RSI: ffff888029d28120 RDI: ffffffff90ea5b80
RBP: 000000000000000a R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888029d297f8
R13: 0000000000000000 R14: ffff8881446c8e80 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124351000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005641c1b014d8 CR3: 000000002d732000 CR4: 00000000003526f0
Call Trace:
<TASK>
ieee80211_if_parse_active_links+0xbb/0x120 net/mac80211/debugfs_netdev.c:732
wiphy_locked_debugfs_write_work+0xe6/0x1c0 net/wireless/debugfs.c:248
cfg80211_wiphy_work+0x446/0x5c0 net/wireless/core.c:440
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: e8 fb 8e 05 f7 call 0xf7058f02
7: 48 8b 34 24 mov (%rsp),%rsi
b: 48 81 c6 20 01 00 00 add $0x120,%rsi
12: 48 89 34 24 mov %rsi,(%rsp)
16: e8 e7 8e 05 f7 call 0xf7058f02
1b: 48 8d 3d 20 ef e7 05 lea 0x5e7ef20(%rip),%rdi # 0x5e7ef42
22: 48 8b 34 24 mov (%rsp),%rsi
26: 44 89 fa mov %r15d,%edx
* 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2e: e9 e0 fe ff ff jmp 0xffffff13
33: e8 ca 8e 05 f7 call 0xf7058f02
38: 0f b7 c5 movzwl %bp,%eax
3b: 4c rex.WR
3c: 8d .byte 0x8d
3d: bb .byte 0xbb
3e: 30 .byte 0x30
---
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reply other threads:[~2026-02-26 3:22 UTC|newest]
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