linux-kernel - Re: [syzbot] [wireless?] WARNING: ODEBUG bug in ieee80211_led

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Message-ID: <67a4d33a.050a0220.6230e.0002.GAE@google.com>
Date: Thu, 06 Feb 2025 07:20:26 -0800
From: syzbot <syzbot+e84ecca6d1fa09a9b3d9@...kaller.appspotmail.com>
To: johannes@...solutions.net, linux-kernel@...r.kernel.org, 
	linux-usb@...r.kernel.org, linux-wireless@...r.kernel.org, 
	netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] WARNING: ODEBUG bug in ieee80211_led_exit (2)

syzbot has found a reproducer for the following issue on:

HEAD commit:    9682c35ff6ec usb: typec: thunderbolt: Remove IS_ERR check ..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=130e6df8580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ed7570f7f6046a71
dashboard link: https://syzkaller.appspot.com/bug?extid=e84ecca6d1fa09a9b3d9
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=170e6df8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=155c5318580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3c194e311f90/disk-9682c35f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/daad45c8e7c8/vmlinux-9682c35f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8a4e74467d7e/bzImage-9682c35f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e84ecca6d1fa09a9b3d9@...kaller.appspotmail.com

------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888114d18330 object type: timer_list hint: tpt_trig_timer+0x0/0x300 net/mac80211/led.c:145
WARNING: CPU: 0 PID: 705 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:

CPU: 0 UID: 0 PID: 705 Comm: kworker/0:2 Not tainted 6.14.0-rc1-syzkaller-g9682c35ff6ec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 48 8b 14 dd 40 d0 47 87 41 56 4c 89 e6 48 c7 c7 c0 c4 47 87 e8 af f6 c0 fe 90 <0f> 0b 90 90 58 83 05 96 71 d8 07 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc9000198f488 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff813f4d09
RDX: ffff88810b3d8000 RSI: ffffffff813f4d16 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000008 R12: ffffffff8747cb60
R13: ffffffff872acb00 R14: ffffffff86f6b4e0 R15: ffffc9000198f598
FS:  0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffebc06edcc CR3: 0000000008ca2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2284 [inline]
 slab_free mm/slub.c:4609 [inline]
 kfree+0x2e1/0x480 mm/slub.c:4757
 ieee80211_led_exit+0x162/0x1c0 net/mac80211/led.c:210
 ieee80211_unregister_hw+0x27e/0x3a0 net/mac80211/main.c:1706
 rt2x00lib_remove_hw drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1085 [inline]
 rt2x00lib_remove_dev+0x528/0x640 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1550
 rt2x00usb_disconnect+0x71/0x240 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:872
 usb_unbind_interface+0x1e2/0x960 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 device_remove+0x122/0x170 drivers/base/dd.c:561
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296
 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579
 device_del+0x396/0x9f0 drivers/base/core.c:3854
 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418
 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2305
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
 port_event drivers/usb/core/hub.c:5823 [inline]
 hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5905
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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.