Hello, syzbot found the following issue on: HEAD commit: 98d107b84614 usb: host: xhci: Remove some unnecessary retu.. 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=14e2cd45700000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c586df4d4c0a65 dashboard link: https://syzkaller.appspot.com/bug?extid=b7f7bc8316a81a317025 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b7f7bc8316a81a317025@xxxxxxxxxxxxxxxxxxxxxxxxx ax88179_178a 1-1:8.224 eth1: Failed to write reg index 0x0001: -19 ax88179_178a 1-1:8.224 eth1: Failed to write reg index 0x0002: -19 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5 at net/sched/sch_generic.c:1484 dev_shutdown+0x44f/0x520 net/sched/sch_generic.c:1484 Modules linked in: CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.17.0-rc6-syzkaller-00100-g98d107b84614 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:dev_shutdown+0x44f/0x520 net/sched/sch_generic.c:1484 Code: fc 48 c7 c2 20 40 d6 86 be 55 00 00 00 48 c7 c7 00 44 d6 86 c6 05 d6 6d ca 03 01 e8 98 96 c4 00 e9 76 fd ff ff e8 41 62 61 fc <0f> 0b e9 b8 fe ff ff 48 8b 7c 24 10 e8 30 83 90 fc e9 de fb ff ff RSP: 0018:ffffc9000005f598 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90007c12000 RDX: 0000000000040000 RSI: ffffffff84e29def RDI: ffff888116c4c510 RBP: ffff888116c4c000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff84e23f1a R11: 0000000000000000 R12: ffff888116c4c410 R13: ffff888110ce4c18 R14: ffffed1022d89880 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bf24000 CR3: 000000010e37a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> unregister_netdevice_many+0x816/0x1870 net/core/dev.c:10408 unregister_netdevice_queue net/core/dev.c:10349 [inline] unregister_netdevice_queue+0x2dd/0x3c0 net/core/dev.c:10339 unregister_netdevice include/linux/netdevice.h:2902 [inline] unregister_netdev+0x18/0x20 net/core/dev.c:10474 usbnet_disconnect+0x139/0x270 drivers/net/usb/usbnet.c:1623 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 __device_release_driver+0x627/0x760 drivers/base/dd.c:1209 device_release_driver_internal drivers/base/dd.c:1242 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1265 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3592 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x1e39/0x44d0 drivers/usb/core/hub.c:5747 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 process_scheduled_works kernel/workqueue.c:2370 [inline] worker_thread+0x833/0x1110 kernel/workqueue.c:2456 kthread+0x2ef/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </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.
