[syzbot] [wireless?] WARNING in cfg80211_ibss_joined

[syzbot] [wireless?] WARNING in cfg80211_ibss_joined

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    7b12c538697f Merge branch 'bpf-fix-objects-stuck-in-free_b..
git tree:       bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=16192035580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=9d4242cb1c54cdf7
dashboard link: https://syzkaller.appspot.com/bug?extid=d0a52209bddfa0948065
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4306e2a7031b/disk-7b12c538.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4f631dc420c7/vmlinux-7b12c538.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6633caf1195c/bzImage-7b12c538.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d0a52209bddfa0948065@syzkaller.appspotmail.com

wlan1: Creating new IBSS network, BSSID 8d:8d:8d:ff:00:00
------------[ cut here ]------------
!bss
WARNING: net/wireless/ibss.c:72 at cfg80211_ibss_joined+0x3a7/0x5b0 net/wireless/ibss.c:72, CPU#1: kworker/u8:15/6639
Modules linked in:
CPU: 1 UID: 0 PID: 6639 Comm: kworker/u8:15 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:cfg80211_ibss_joined+0x3a7/0x5b0 net/wireless/ibss.c:72
Code: 48 89 da 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 fd 81 50 f6 e8 d8 25 8a f6 90 0f 0b 90 e9 0b fd ff ff e8 ca 25 8a f6 90 <0f> 0b 90 eb 5c 44 89 fe 83 e6 01 31 ff e8 b7 2a 8a f6 44 89 f8 83
RSP: 0018:ffffc90010217570 EFLAGS: 00010293
RAX: ffffffff8b3db6f6 RBX: 0000000000000001 RCX: ffff888032853e80
RDX: 0000000000000000 RSI: ffffffff8c6da760 RDI: ffffffff8c6da720
RBP: ffff888069cc3518 R08: ffffffff907a547f R09: 1ffffffff20f4a8f
R10: dffffc0000000000 R11: fffffbfff20f4a90 R12: ffff8880561e4ed0
R13: 0000000000000001 R14: 1ffff1100ac3c9da R15: 0000000000000cc0
FS:  0000000000000000(0000) GS:ffff888124dcb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb644e39246 CR3: 0000000059b92000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 __ieee80211_sta_join_ibss+0xdd8/0x1660 net/mac80211/ibss.c:375
 ieee80211_sta_create_ibss+0x300/0x480 net/mac80211/ibss.c:1287
 ieee80211_sta_find_ibss net/mac80211/ibss.c:1448 [inline]
 ieee80211_ibss_work+0xb85/0x1060 net/mac80211/ibss.c:1637
 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:564
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>


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