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SubjectWARNING in usb_submit_urb (2)
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Hello,

syzbot found the following crash on:

HEAD commit: 58c3f14f86c9 Merge tag 'riscv-for-linus-4.19-rc2' of git:/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=175be2b6400000
kernel config: https://syzkaller.appspot.com/x/.config?x=531a917630d2a492
dashboard link: https://syzkaller.appspot.com/bug?extid=843efa30c8821bd69f53
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1526e5c1400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=149b727a400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+843efa30c8821bd69f53@syzkaller.appspotmail.com

random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
IPVS: ftp: loaded support on port[0] = 21
------------[ cut here ]------------
usb usb1: BOGUS urb flags, 40 --> 0
WARNING: CPU: 1 PID: 4674 at drivers/usb/core/urb.c:503
usb_submit_urb+0x719/0x14d0 drivers/usb/core/urb.c:502
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4674 Comm: syz-executor803 Not tainted 4.19.0-rc1+ #215
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
panic+0x238/0x4e7 kernel/panic.c:184
__warn.cold.8+0x163/0x1ba kernel/panic.c:536
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:usb_submit_urb+0x719/0x14d0 drivers/usb/core/urb.c:502
Code: 08 fd 48 8b 45 d0 48 8d b8 a0 00 00 00 e8 1f ce 72 ff 45 89 e0 44 89
e9 4c 89 fa 48 89 c6 48 c7 c7 40 d8 7d 87 e8 57 ec d2 fc <0f> 0b e8 30 29
08 fd 48 c7 c6 40 d9 7d 87 4c 89 f7 e8 71 2a 08 fd
RSP: 0018:ffff8801b6e5f278 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8801d38ae500 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: ffff8801b6e5ef68
RBP: ffff8801b6e5f2e8 R08: ffff8801b6f30100 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000040 R14: 0000000000000000 R15: ffff8801ceb80ac0
proc_do_submiturb+0x2669/0x3d70 drivers/usb/core/devio.c:1763
proc_submiturb_compat+0x544/0x800 drivers/usb/core/devio.c:1997
usbdev_do_ioctl+0x19a5/0x3b30 drivers/usb/core/devio.c:2474
usbdev_ioctl+0x25/0x30 drivers/usb/core/devio.c:2551
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
__do_sys_ioctl fs/ioctl.c:709 [inline]
__se_sys_ioctl fs/ioctl.c:707 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x444799
Code: 25 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 2b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffdb22eee60 RCX: 0000000000444799
RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522
R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402350
R13: 00000000004023e0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug 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@googlegroups.com.

syzbot will keep track of this bug report. See:
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syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

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