linux-kernel - [syzbot] [wireless?] WARNING: ODEBUG bug in _cfg80211_unregister

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Message-ID: <671b9cc4.050a0220.2e773.0004.GAE@google.com>
Date: Fri, 25 Oct 2024 06:27:32 -0700
From: syzbot <syzbot+66941b4fb1cdd6585c62@...kaller.appspotmail.com>
To: johannes@...solutions.net, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [wireless?] WARNING: ODEBUG bug in _cfg80211_unregister_wdev

Hello,

syzbot found the following issue on:

HEAD commit:    42f7652d3eb5 Linux 6.12-rc4
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16c3e430580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fc6f8ce8c5369043
dashboard link: https://syzkaller.appspot.com/bug?extid=66941b4fb1cdd6585c62
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ed847da7e5cc/disk-42f7652d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/66c7a2b66b5b/vmlinux-42f7652d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9878229c04ae/bzImage-42f7652d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+66941b4fb1cdd6585c62@...kaller.appspotmail.com

------------[ cut here ]------------
ODEBUG: activate active (active state 1) object: ffff888061cc0600 object type: rcu_head hint: 0x0
WARNING: CPU: 0 PID: 4423 at lib/debugobjects.c:517 debug_print_object+0x17a/0x1f0 lib/debugobjects.c:514
Modules linked in:
CPU: 0 UID: 0 PID: 4423 Comm: kworker/u8:7 Not tainted 6.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:debug_print_object+0x17a/0x1f0 lib/debugobjects.c:514
Code: e8 9b 5e 3b fd 4c 8b 0b 48 c7 c7 a0 0b 61 8c 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f8 ff 34 24 e8 1b 93 92 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 a4 e2 59 0b 48 83 c4 10 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc9000cd37578 EFLAGS: 00010286
RAX: 29d90125cddd4800 RBX: ffffffff8c0be6e0 RCX: ffff888032333c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8c610d20 R08: ffffffff8155e402 R09: fffffbfff1cf9fe0
R10: dffffc0000000000 R11: fffffbfff1cf9fe0 R12: 0000000000000001
R13: ffffffff8c610c38 R14: dffffc0000000000 R15: ffff888061cc0600
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555c3b808 CR3: 00000000652c6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 debug_object_activate+0x357/0x510 lib/debugobjects.c:732
 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
 kvfree_call_rcu+0x99/0x790 kernel/rcu/tree.c:3801
 _cfg80211_unregister_wdev+0x347/0x560 net/wireless/core.c:1238
 ieee80211_remove_interfaces+0x4db/0x700 net/mac80211/iface.c:2300
 ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1669
 mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5625
 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6505
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x802/0xcc0 net/core/net_namespace.c:626
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>


---
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