Hello, syzbot found the following issue on: HEAD commit: c2131f7e Merge tag 'gfs2-v5.13-rc2-fixes' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1204b5d3d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2ecf1aa681aadc1 dashboard link: https://syzkaller.appspot.com/bug?extid=b70e32fc4c6568d6d19e compiler: Debian clang version 11.0.1-2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15282db7d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1763504dd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b70e32fc4c6568d6d19e@xxxxxxxxxxxxxxxxxxxxxxxxx usb 1-1: Read EDID byte 0 failed: -71 usb 1-1: Read EDID byte 0 failed: -71 usb 1-1: Read EDID byte 0 failed: -71 usb 1-1: Unable to get valid EDID from device/display ------------[ cut here ]------------ usb 1-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 0 PID: 8629 at drivers/usb/core/urb.c:494 usb_submit_urb+0xacd/0x1550 drivers/usb/core/urb.c:493 Modules linked in: CPU: 0 PID: 8629 Comm: kworker/0:4 Not tainted 5.13.0-rc4-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+0xacd/0x1550 drivers/usb/core/urb.c:493 Code: d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 bd 07 00 00 44 8b 03 48 c7 c7 80 86 e1 8a 4c 89 f6 4c 89 fa 89 e9 31 c0 e8 63 c7 8f fb <0f> 0b 4c 8b 74 24 30 45 89 f7 4c 89 ff 48 c7 c6 70 e1 8d 8d e8 6a RSP: 0018:ffffc90001f36660 EFLAGS: 00010246 RAX: 0baf7fe5b4c01b00 RBX: ffffffff8ae184ac RCX: ffff888035c09c40 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: ffffffff81655632 R09: ffffed1017345f90 R10: ffffed1017345f90 R11: 0000000000000000 R12: ffff888017813700 R13: dffffc0000000000 R14: ffffffff8ae226e0 R15: ffff888017212b90 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe721263740 CR3: 0000000017ff3000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dlfb_submit_urb drivers/video/fbdev/udlfb.c:1969 [inline] dlfb_set_video_mode+0x1b2a/0x3500 drivers/video/fbdev/udlfb.c:315 dlfb_ops_set_par+0x731/0xb50 drivers/video/fbdev/udlfb.c:1110 dlfb_usb_probe+0x184e/0x21b0 drivers/video/fbdev/udlfb.c:1732 usb_probe_interface+0x633/0xb40 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:3324 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:3324 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:2276 worker_thread+0xac1/0x1300 kernel/workqueue.c:2422 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
