Hello,
syzbot found the following crash on:
HEAD commit: e96407b4 usb-fuzzer: main usb gadget fuzzer driver
git tree: https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=14f54e26600000
kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e
dashboard link: https://syzkaller.appspot.com/bug?extid=5ef817fc02cd64d038a3
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+5ef817fc02cd64d038a3@xxxxxxxxxxxxxxxxxxxxxxxxx
------------[ cut here ]------------
usb 4-1: BOGUS urb xfer, pipe 2 != type 2
WARNING: CPU: 0 PID: 7794 at drivers/usb/core/urb.c:477
usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7794 Comm: syz-executor.4 Not tainted 5.3.0-rc2+ #25
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+0xca/0x13e lib/dump_stack.c:113
panic+0x2a3/0x6da kernel/panic.c:219
__warn.cold+0x20/0x4a kernel/panic.c:576
report_bug+0x262/0x2a0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:179 [inline]
fixup_bug arch/x86/kernel/traps.c:174 [inline]
do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026
RIP: 0010:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Code: 4d 85 ed 74 2c e8 28 76 ed fd 4c 89 f7 e8 c0 6d 1a ff 41 89 d8 44 89
e1 4c 89 ea 48 89 c6 48 c7 c7 60 e7 18 86 e8 3d 47 c3 fd <0f> 0b e9 20 f4
ff ff e8 fc 75 ed fd 4c 89 f2 48 b8 00 00 00 00 00
RSP: 0018:ffff8881b01178a0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 000000000000549e RSI: ffffffff8128a0fd RDI: ffffed1036022f06
RBP: 0000000000000000 R08: ffff8881cfd11800 R09: fffffbfff11acda9
R10: fffffbfff11acda8 R11: ffffffff88d66d47 R12: 0000000000000002
R13: ffff8881cd771828 R14: ffff8881c87e22a0 R15: ffff8881d3f1ac00
usb_start_wait_urb+0x108/0x2b0 drivers/usb/core/message.c:57
usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
usb_get_string+0xac/0x1a0 drivers/usb/core/message.c:693
usb_string_sub+0x8b/0x3d0 drivers/usb/core/message.c:737
usb_string+0x32b/0x480 drivers/usb/core/message.c:836
hiddev_ioctl_string.isra.0+0xf5/0x1d0 drivers/hid/usbhid/hiddev.c:576
hiddev_ioctl+0x5b8/0x1550 drivers/hid/usbhid/hiddev.c:682
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:509 [inline]
do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713
__do_sys_ioctl fs/ioctl.c:720 [inline]
__se_sys_ioctl fs/ioctl.c:718 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718
do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8529fb1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 00000000200001c0 RSI: 0000000081044804 RDI: 0000000000000004
RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8529fb26d4
R13: 00000000004c2249 R14: 00000000004d55f8 R15: 00000000ffffffff
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@xxxxxxxxxxxxxxxx.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
