Hello, syzbot found the following issue on: HEAD commit: dd81e1c7d5fb Merge tag 'powerpc-5.17-2' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=126d2170700000 kernel config: https://syzkaller.appspot.com/x/.config?x=36924ae974256627 dashboard link: https://syzkaller.appspot.com/bug?extid=48a2d3f5d7c977bc22d7 compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1312815bb00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13804918700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+48a2d3f5d7c977bc22d7@xxxxxxxxxxxxxxxxxxxxxxxxx input: CM109 USB driver as /devices/platform/dummy_hcd.4/usb5/5-1/5-1:0.0/input/input1176 list_add double add: new=ffff888013fffd18, prev=ffff888013fffd18, next=ffff8880244c9070. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:31! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 140 Comm: kworker/0:2 Not tainted 5.17.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:__list_add_valid+0x8a/0xc0 lib/list_debug.c:29 Code: 74 11 4d 39 f7 74 0c b0 01 5b 41 5c 41 5d 41 5e 41 5f c3 48 c7 c7 80 5a d6 8a 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 3e 3c 53 fd <0f> 0b 48 c7 c7 40 59 d6 8a 4c 89 e6 4c 89 f1 31 c0 e8 28 3c 53 fd RSP: 0018:ffffc9000282e680 EFLAGS: 00010046 RAX: 0000000000000058 RBX: ffff8880244c9078 RCX: 1c7d44314f50cc00 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: ffff8880244c9078 R08: ffffffff816affd2 R09: ffffed1017344f24 R10: ffffed1017344f24 R11: 0000000000000000 R12: ffff888013fffd18 R13: dffffc0000000000 R14: ffff8880244c9070 R15: ffff888013fffd18 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff0109a9f8 CR3: 000000001fd14000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __list_add include/linux/list.h:69 [inline] list_add_tail include/linux/list.h:102 [inline] usb_hcd_link_urb_to_ep+0x1ae/0x300 drivers/usb/core/hcd.c:1181 dummy_urb_enqueue+0x2a9/0x750 drivers/usb/gadget/udc/dummy_hcd.c:1284 usb_hcd_submit_urb+0x2be/0x5f0 drivers/usb/core/hcd.c:1555 cm109_input_open+0x1eb/0x460 drivers/input/misc/cm109.c:572 input_open_device+0x184/0x2d0 drivers/input/input.c:629 kbd_connect+0xe5/0x120 drivers/tty/vt/keyboard.c:1593 input_attach_handler drivers/input/input.c:1035 [inline] input_register_device+0xd95/0x1140 drivers/input/input.c:2335 cm109_usb_probe+0x11bf/0x16c0 drivers/input/misc/cm109.c:806 usb_probe_interface+0x633/0xb40 drivers/usb/core/driver.c:396 call_driver_probe+0x96/0x250 really_probe+0x222/0x9f0 drivers/base/dd.c:596 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:752 driver_probe_device+0x50/0x240 drivers/base/dd.c:782 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:899 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x310/0x560 drivers/base/dd.c:970 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0x11c8/0x16d0 drivers/base/core.c:3405 usb_set_configuration+0x1a86/0x2100 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x13a/0x260 drivers/usb/core/driver.c:293 call_driver_probe+0x96/0x250 really_probe+0x222/0x9f0 drivers/base/dd.c:596 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:752 driver_probe_device+0x50/0x240 drivers/base/dd.c:782 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:899 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x310/0x560 drivers/base/dd.c:970 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0x11c8/0x16d0 drivers/base/core.c:3405 usb_new_device+0x108a/0x1940 drivers/usb/core/hub.c:2566 hub_port_connect+0x100b/0x2910 drivers/usb/core/hub.c:5358 hub_port_connect_change+0x5f9/0xc20 drivers/usb/core/hub.c:5502 port_event+0xca0/0x13e0 drivers/usb/core/hub.c:5660 hub_event+0x4ed/0xe40 drivers/usb/core/hub.c:5742 process_one_work+0x850/0x1130 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid+0x8a/0xc0 lib/list_debug.c:29 Code: 74 11 4d 39 f7 74 0c b0 01 5b 41 5c 41 5d 41 5e 41 5f c3 48 c7 c7 80 5a d6 8a 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 3e 3c 53 fd <0f> 0b 48 c7 c7 40 59 d6 8a 4c 89 e6 4c 89 f1 31 c0 e8 28 3c 53 fd RSP: 0018:ffffc9000282e680 EFLAGS: 00010046 RAX: 0000000000000058 RBX: ffff8880244c9078 RCX: 1c7d44314f50cc00 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: ffff8880244c9078 R08: ffffffff816affd2 R09: ffffed1017344f24 R10: ffffed1017344f24 R11: 0000000000000000 R12: ffff888013fffd18 R13: dffffc0000000000 R14: ffff8880244c9070 R15: ffff888013fffd18 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff0109a9f8 CR3: 000000001fd14000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
