bisecting fixing commit since c2131f7e73c9e9365613e323d65c7b9e5b910f56
building syzkaller on 032639db52e37f547ea03f03fce37eb8568eb482
testing commit c2131f7e73c9e9365613e323d65c7b9e5b910f56
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: 147ad25c24cdcf8eacf6ca19cb474705f7465693a60b38257da1dd9f439d627f
all runs: crashed: WARNING in dlfb_submit_urb/usb_submit_urb
testing current HEAD c500bee1c5b2f1d59b1081ac879d73268ab0ff17
testing commit c500bee1c5b2f1d59b1081ac879d73268ab0ff17
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1
kernel signature: 81de1cf4d4d11d61842002684788ea7f9483b15f0d0063e5640afd49f544328f
all runs: crashed: WARNING in dlfb_submit_urb/usb_submit_urb
revisions tested: 2, total time: 20m43.280336478s (build: 13m3.113359477s, test: 6m54.840153671s)
the crash still happens on HEAD
commit msg: Linux 5.14-rc4
crash: WARNING in dlfb_submit_urb/usb_submit_urb
------------[ cut here ]------------
usb 2-1: BOGUS urb xfer, pipe 3 != type 1
WARNING: CPU: 1 PID: 20 at drivers/usb/core/urb.c:502 usb_submit_urb+0xb07/0x1680 drivers/usb/core/urb.c:502
Modules linked in:
CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.14.0-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+0xb07/0x1680 drivers/usb/core/urb.c:502
Code: 4c 24 18 89 4c 24 08 44 89 04 24 e8 23 8a 21 ff 44 8b 04 24 4c 89 e2 48 c7 c7 00 e5 3e 89 8b 4c 24 08 48 89 c6 e8 f9 c0 3c 03 <0f> 0b 4c 8b 4c 24 18 e9 c0 fa ff ff 48 8d 7b 1c 48 ba 00 00 00 00
RSP: 0018:ffffc90000da6d70 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888017ef4000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff88fedbe0 RDI: fffff520001b4da0
RBP: ffff888146f16600 R08: 0000000000000001 R09: ffff8880b9f2ff47
R10: ffffed10173e5fe8 R11: 3a312d3220627375 R12: ffff888016065690
R13: 000000000000000b R14: 0000000000000003 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f42ad47d740 CR3: 00000000153a6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dlfb_submit_urb+0x6c/0x140 drivers/video/fbdev/udlfb.c:1969
 dlfb_set_video_mode+0x1fe2/0x2940 drivers/video/fbdev/udlfb.c:315
 dlfb_ops_set_par+0x275/0x890 drivers/video/fbdev/udlfb.c:1110
 dlfb_usb_probe.cold+0x1091/0x1d05 drivers/video/fbdev/udlfb.c:1732
 usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x1b9/0xb70 drivers/base/dd.c:595
 __driver_probe_device+0x2a6/0x460 drivers/base/dd.c:747
 driver_probe_device+0x44/0x110 drivers/base/dd.c:777
 __device_attach_driver+0x185/0x250 drivers/base/dd.c:894
 bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
 __device_attach+0x1db/0x410 drivers/base/dd.c:965
 bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
 device_add+0xa2f/0x1e00 drivers/base/core.c:3354
 usb_set_configuration+0x9fc/0x1750 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238
 usb_probe_device+0x95/0x240 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x1b9/0xb70 drivers/base/dd.c:595
 __driver_probe_device+0x2a6/0x460 drivers/base/dd.c:747
 driver_probe_device+0x44/0x110 drivers/base/dd.c:777
 __device_attach_driver+0x185/0x250 drivers/base/dd.c:894
 bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
 __device_attach+0x1db/0x410 drivers/base/dd.c:965
 bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
 device_add+0xa2f/0x1e00 drivers/base/core.c:3354
 usb_new_device.cold+0x5cf/0xedf drivers/usb/core/hub.c:2563
 hub_port_connect drivers/usb/core/hub.c:5348 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5488 [inline]
 port_event drivers/usb/core/hub.c:5634 [inline]
 hub_event+0x10a3/0x36c0 drivers/usb/core/hub.c:5716
 process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276
 worker_thread+0x598/0x1040 kernel/workqueue.c:2422
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295