Hello, syzbot found the following issue on: HEAD commit: dbb5afad ptrace: make ptrace() fail if the tracee changed .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=120cf41dd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=91ff0467ce169bc dashboard link: https://syzkaller.appspot.com/bug?extid=d2ecf8b4cf94672e38a0 compiler: Debian clang version 11.0.1-2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145312add00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d2ecf8b4cf94672e38a0@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ URB 0000000042c435ee submitted while active WARNING: CPU: 0 PID: 4812 at drivers/usb/core/urb.c:378 usb_submit_urb+0xf7f/0x1550 drivers/usb/core/urb.c:378 Modules linked in: CPU: 0 PID: 4812 Comm: kworker/0:3 Not tainted 5.13.0-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:usb_submit_urb+0xf7f/0x1550 drivers/usb/core/urb.c:378 Code: 5c 41 5d 41 5e 41 5f 5d e9 ae 57 ff ff e8 79 e7 c3 fb c6 05 82 cd 69 08 01 48 c7 c7 60 81 e1 8a 4c 89 e6 31 c0 e8 41 35 90 fb <0f> 0b e9 f8 f0 ff ff e8 55 e7 c3 fb eb 05 e8 4e e7 c3 fb bb a6 ff RSP: 0018:ffffc9000a44e898 EFLAGS: 00010246 RAX: bb99830218d5f900 RBX: ffff888018da6308 RCX: ffff88802993d4c0 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000cc0 R08: ffffffff81654e72 R09: ffffed1017343f24 R10: ffffed1017343f24 R11: 0000000000000000 R12: ffff888018da6300 R13: dffffc0000000000 R14: ffff888013de7850 R15: ffff888013de7810 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fe941736a7 CR3: 000000001e8f1000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:1581 input_attach_handler drivers/input/input.c:1035 [inline] input_register_device+0xe25/0x1350 drivers/input/input.c:2335 cm109_usb_probe+0x11bf/0x16c0 drivers/input/misc/cm109.c:806 usb_probe_interface+0x632/0xb30 drivers/usb/core/driver.c:396 really_probe+0x3cb/0x1020 drivers/base/dd.c:580 driver_probe_device+0x178/0x350 drivers/base/dd.c:763 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:431 __device_attach+0x301/0x560 drivers/base/dd.c:938 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:491 device_add+0x11fc/0x1670 drivers/base/core.c:3319 usb_set_configuration+0x1a86/0x2100 drivers/usb/core/message.c:2164 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x13a/0x260 drivers/usb/core/driver.c:293 really_probe+0x3cb/0x1020 drivers/base/dd.c:580 driver_probe_device+0x178/0x350 drivers/base/dd.c:763 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:431 __device_attach+0x301/0x560 drivers/base/dd.c:938 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:491 device_add+0x11fc/0x1670 drivers/base/core.c:3319 usb_new_device+0xd45/0x1790 drivers/usb/core/hub.c:2556 hub_port_connect+0x1055/0x27a0 drivers/usb/core/hub.c:5276 hub_port_connect_change+0x5d0/0xbf0 drivers/usb/core/hub.c:5416 port_event+0xaee/0x1140 drivers/usb/core/hub.c:5562 hub_event+0x48d/0xd90 drivers/usb/core/hub.c:5644 process_one_work+0x833/0x10c0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 --- 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
