Hello, syzbot found the following issue on: HEAD commit: 819984a0dd36 kselftest: devices: Add of-fullname-regex pro.. 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=12779c82980000 kernel config: https://syzkaller.appspot.com/x/.config?x=9ccd5ad0e0c891e3 dashboard link: https://syzkaller.appspot.com/bug?extid=e9121deb112a224121e0 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=1680423e980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1690b5ea980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4a1c28712015/disk-819984a0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/be01b9b3db3a/vmlinux-819984a0.xz kernel image: https://storage.googleapis.com/syzbot-assets/5c8994363c20/bzImage-819984a0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e9121deb112a224121e0@xxxxxxxxxxxxxxxxxxxxxxxxx asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 ref_tracker: freed in: netdev_tracker_free include/linux/netdevice.h:4058 [inline] netdev_put include/linux/netdevice.h:4075 [inline] netdev_put include/linux/netdevice.h:4071 [inline] dev_watchdog_down net/sched/sch_generic.c:570 [inline] dev_deactivate_many+0x214/0xb40 net/sched/sch_generic.c:1362 dev_deactivate+0xf9/0x1c0 net/sched/sch_generic.c:1396 linkwatch_do_dev+0x11e/0x160 net/core/link_watch.c:175 __linkwatch_run_queue+0x233/0x690 net/core/link_watch.c:234 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:277 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2496 at lib/ref_tracker.c:255 ref_tracker_free+0x61e/0x820 lib/ref_tracker.c:255 Modules linked in: CPU: 0 PID: 2496 Comm: kworker/0:0 Not tainted 6.10.0-rc4-syzkaller-00053-g819984a0dd36 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:ref_tracker_free+0x61e/0x820 lib/ref_tracker.c:255 Code: 00 44 8b 6b 18 31 ff 44 89 ee e8 4d d8 f1 fe 45 85 ed 0f 85 a6 00 00 00 e8 3f dd f1 fe 48 8b 34 24 48 89 ef e8 83 f3 32 04 90 <0f> 0b 90 bb ea ff ff ff e9 4e fd ff ff e8 20 dd f1 fe 4c 8d 6d 44 RSP: 0018:ffffc900002d7298 EFLAGS: 00010202 RAX: 0000000000000201 RBX: ffff8881137311c0 RCX: 0000000000000000 RDX: 0000000000000202 RSI: ffffffff86c7d6e0 RDI: 0000000000000001 RBP: ffff88811fc185e0 R08: 0000000000000001 R09: fffffbfff1997dae R10: ffffffff8ccbed77 R11: fffffffffffda9a0 R12: 1ffff9200005ae55 R13: 0000000005a60115 R14: ffff8881137311d8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae50793120 CR3: 00000001026b6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> netdev_tracker_free include/linux/netdevice.h:4058 [inline] netdev_put include/linux/netdevice.h:4075 [inline] netdev_put include/linux/netdevice.h:4071 [inline] dev_watchdog_down net/sched/sch_generic.c:570 [inline] dev_deactivate_many+0x214/0xb40 net/sched/sch_generic.c:1362 __dev_close_many+0x145/0x310 net/core/dev.c:1543 dev_close_many+0x24c/0x6a0 net/core/dev.c:1581 unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11194 unregister_netdevice_many net/core/dev.c:11277 [inline] unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11156 unregister_netdevice include/linux/netdevice.h:3119 [inline] unregister_netdev+0x1c/0x30 net/core/dev.c:11295 usbnet_disconnect+0xed/0x500 drivers/net/usb/usbnet.c:1621 usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:568 [inline] device_remove+0x122/0x170 drivers/base/dd.c:560 __device_release_driver drivers/base/dd.c:1270 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1293 bus_remove_device+0x22f/0x420 drivers/base/bus.c:574 device_del+0x396/0x9f0 drivers/base/core.c:3868 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2304 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1be4/0x4f50 drivers/usb/core/hub.c:5903 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
