Re: WARNING in yurex_write/usb_submit_urb

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    a256e240 usb: phy: convert comma to semicolon
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=147b6adf500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e267dbb5fea6c8b3
dashboard link: https://syzkaller.appspot.com/bug?extid=e87ebe0f7913f71f2ea5
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15edcf17500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e87ebe0f7913f71f2ea5@xxxxxxxxxxxxxxxxxxxxxxxxx

------------[ cut here ]------------
URB 000000000aabe4b9 submitted while active
WARNING: CPU: 1 PID: 7771 at drivers/usb/core/urb.c:378 usb_submit_urb+0x1228/0x14e0 drivers/usb/core/urb.c:378
Modules linked in:
CPU: 1 PID: 7771 Comm: syz-executor.4 Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:usb_submit_urb+0x1228/0x14e0 drivers/usb/core/urb.c:378
Code: 89 de e8 8b 24 bd fd 84 db 0f 85 da f4 ff ff e8 2e 2c bd fd 4c 89 fe 48 c7 c7 c0 63 41 86 c6 05 33 ea b0 04 01 e8 63 2d f3 01 <0f> 0b e9 b8 f4 ff ff c7 44 24 14 01 00 00 00 e9 6f f5 ff ff 41 bd
RSP: 0018:ffffc90001a57cb8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888122eee500 RSI: ffffffff8128f483 RDI: fffff5200034af89
RBP: 1ffff9200034afa9 R08: 0000000000000001 R09: ffff8881f6b2f5cf
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888109853400
R13: 00000000fffffff0 R14: ffff8881098534e8 R15: ffff888107dbfc00
FS:  00007fee407c7700(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb79c135ef0 CR3: 000000010b8aa000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 yurex_write+0x3f4/0x840 drivers/usb/misc/yurex.c:494
 vfs_write+0x28e/0x9e0 fs/read_write.c:603
 ksys_write+0x12d/0x250 fs/read_write.c:658
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e159
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fee407c6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e159
RDX: 0000000000000001 RSI: 0000000020000740 RDI: 0000000000000004
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fffcdbf5b7f R14: 00007fee407c79c0 R15: 000000000119bf8c