[v6.1] WARNING in cfg80211_bss_update

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 50cbba13faa2 Linux 6.1.159
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14e94422580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31ea1cecaf34f0db
dashboard link: https://syzkaller.appspot.com/bug?extid=8d9fab724d08da609d8e
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1352bb92580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12c9bbb4580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ad0bd66715a/disk-50cbba13.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3284d626258e/vmlinux-50cbba13.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a1f92ca7bbfc/Image-50cbba13.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8d9fab...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 88 at net/wireless/scan.c:1710 __list_del_entry include/linux/list.h:134 [inline]
WARNING: CPU: 0 PID: 88 at net/wireless/scan.c:1710 list_del include/linux/list.h:148 [inline]
WARNING: CPU: 0 PID: 88 at net/wireless/scan.c:1710 cfg80211_combine_bsses net/wireless/scan.c:1711 [inline]
WARNING: CPU: 0 PID: 88 at net/wireless/scan.c:1710 cfg80211_bss_update+0xe7c/0x1c7c net/wireless/scan.c:1907
Modules linked in:
CPU: 0 PID: 88 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: phy6 ieee80211_iface_work
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : cfg80211_combine_bsses include/linux/list.h:134 [inline]
pc : cfg80211_bss_update+0xe7c/0x1c7c net/wireless/scan.c:1907
lr : cfg80211_bss_update+0xc54/0x1c7c net/wireless/scan.c:-1
sp : ffff80001ce37260
x29: ffff80001ce37340 x28: 0000000000000000 x27: 0000000000000001
x26: ffff0000d8725800 x25: ffff0000deae901d x24: ffff0000d8725880
x23: ffff0000cd0c2448 x22: ffff0000d8725810 x21: ffff0000cd0c2410
x20: ffff0000cd0c2400 x19: dfff800000000000 x18: ffff800011a5bd40
x17: 1fffe00033ee7b7e x16: ffff800008042d90 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000ff0100
x11: ff00800010fc863c x10: 0000000000000000 x9 : ffff0000c62a5340
x8 : ffff0000cd0c7410 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff0000cd0c24c8 x4 : ffff80001ce37528 x3 : ffff800010fc87ec
x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000d8725810
Call trace:
__list_del_entry include/linux/list.h:134 [inline]
list_del include/linux/list.h:148 [inline]
cfg80211_combine_bsses net/wireless/scan.c:1711 [inline]
cfg80211_bss_update+0xe7c/0x1c7c net/wireless/scan.c:1907
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2512 [inline]
cfg80211_inform_bss_frame_data+0x884/0x10b4 net/wireless/scan.c:2545
ieee80211_bss_info_update+0x5d0/0x9b4 net/mac80211/scan.c:190
ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
ieee80211_ibss_rx_queued_mgmt+0x86c/0x2490 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1679 [inline]
ieee80211_iface_work+0x598/0xa34 net/mac80211/iface.c:1733
process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
kthread+0x250/0x2d8 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 590799
hardirqs last enabled at (590798): [<ffff8000088ccf00>] ___slab_alloc+0xcdc/0xec8 mm/slub.c:3088
hardirqs last disabled at (590799): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (590704): [<ffff800010fc7130>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last enabled at (590704): [<ffff800010fc7130>] cfg80211_get_bss+0x5dc/0x850 net/wireless/scan.c:1564
softirqs last disabled at (590792): [<ffff800010fc7a68>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (590792): [<ffff800010fc7a68>] cfg80211_bss_update+0x80/0x1c7c net/wireless/scan.c:1843
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 88 at net/wireless/scan.c:1708 cfg80211_combine_bsses net/wireless/scan.c:1708 [inline]
WARNING: CPU: 0 PID: 88 at net/wireless/scan.c:1708 cfg80211_bss_update+0xe70/0x1c7c net/wireless/scan.c:1907
Modules linked in:
CPU: 0 PID: 88 Comm: kworker/u4:3 Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: phy6 ieee80211_iface_work
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : cfg80211_combine_bsses net/wireless/scan.c:1708 [inline]
pc : cfg80211_bss_update+0xe70/0x1c7c net/wireless/scan.c:1907
lr : cfg80211_combine_bsses net/wireless/scan.c:1708 [inline]
lr : cfg80211_bss_update+0xe70/0x1c7c net/wireless/scan.c:1907
sp : ffff80001ce37260
x29: ffff80001ce37340 x28: 0000000000000000 x27: 0000000000000002
x26: ffff0000cd0c7400 x25: ffff0000d368e01d x24: ffff0000cd0c7480
x23: ffff0000cd0c2448 x22: ffff0000cd0c7490 x21: ffff0000cd0c2410
x20: ffff0000cd0c2400 x19: dfff800000000000 x18: ffff800011a5bd40
x17: 1fffe00033ee7b7e x16: ffff800008042d90 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000ff0100
x11: ff00800010fc8858 x10: 0000000000000000 x9 : ffff800010fc8858
x8 : ffff0000c62a5340 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff0000cd0c24c8 x4 : ffff80001ce37528 x3 : ffff800010fc87ec
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000006
Call trace:
cfg80211_combine_bsses net/wireless/scan.c:1708 [inline]
cfg80211_bss_update+0xe70/0x1c7c net/wireless/scan.c:1907
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2512 [inline]
cfg80211_inform_bss_frame_data+0x884/0x10b4 net/wireless/scan.c:2545
ieee80211_bss_info_update+0x5d0/0x9b4 net/mac80211/scan.c:190
ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
ieee80211_ibss_rx_queued_mgmt+0x86c/0x2490 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1679 [inline]
ieee80211_iface_work+0x598/0xa34 net/mac80211/iface.c:1733
process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
kthread+0x250/0x2d8 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 590805
hardirqs last enabled at (590804): [<ffff8000118fc2fc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last enabled at (590804): [<ffff8000118fc2fc>] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (590805): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (590704): [<ffff800010fc7130>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last enabled at (590704): [<ffff800010fc7130>] cfg80211_get_bss+0x5dc/0x850 net/wireless/scan.c:1564
softirqs last disabled at (590792): [<ffff800010fc7a68>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (590792): [<ffff800010fc7a68>] cfg80211_bss_update+0x80/0x1c7c net/wireless/scan.c:1843
---[ end trace 0000000000000000 ]---


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