linux-kernel - Re: [syzbot] [wireless?] WARNING in cfg80211_scan

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Message-ID: <695bef1d.050a0220.318c5c.012b.GAE@google.com>
Date: Mon, 05 Jan 2026 09:04:29 -0800
From: syzbot <syzbot+189dcafc06865d38178d@...kaller.appspotmail.com>
To: davem@...emloft.net, edumazet@...gle.com, johannes@...solutions.net, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, 
	lizhi.xu@...driver.com, netdev@...r.kernel.org, pabeni@...hat.com, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] WARNING in cfg80211_scan_done

syzbot has found a reproducer for the following issue on:

HEAD commit:    3609fa95fb0f Merge tag 'devicetree-fixes-for-6.19-2' of gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17dac074580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1f2b6fe1fdf1a00b
dashboard link: https://syzkaller.appspot.com/bug?extid=189dcafc06865d38178d
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=135c2f92580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=175c2f92580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e4b2b971f67c/disk-3609fa95.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9b03d2a13efd/vmlinux-3609fa95.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2727d816c6d5/bzImage-3609fa95.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+189dcafc06865d38178d@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: net/wireless/scan.c:1194 at cfg80211_scan_done+0x2d5/0x460 net/wireless/scan.c:1193, CPU#0: kworker/u8:15/3576
Modules linked in:
CPU: 0 UID: 0 PID: 3576 Comm: kworker/u8:15 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:cfg80211_scan_done+0x2d5/0x460 net/wireless/scan.c:1193
Code: 75 7b 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 7a 8a 9c f7 90 0f 0b 90 e9 25 fe ff ff e8 6c 8a 9c f7 90 <0f> 0b 90 e9 db fe ff ff e8 5e 8a 9c f7 48 8d 3d f7 43 c7 04 67 48
RSP: 0018:ffffc9000d2e78e0 EFLAGS: 00010293
RAX: ffffffff8a2321c4 RBX: ffff88802e603618 RCX: ffff88803083dac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d2e79a8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1db66ef R12: ffff88802e603600
R13: ffff88802e603678 R14: dffffc0000000000 R15: ffff888031c10860
FS:  0000000000000000(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff386e7408 CR3: 000000000d3a8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __ieee80211_scan_completed+0x550/0xb20 net/mac80211/scan.c:505
 cfg80211_wiphy_work+0x2ab/0x450 net/wireless/core.c:438
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.