hid-generic 0000:0000:0000.000D: hidraw0: <UNKNOWN> HID v0.00 Device [syz0] on syz1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 13187 Comm: syz-executor1 Not tainted 4.9.122-g54068d6 #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801b8a2c800 task.stack: ffff8801a5c28000
RIP: 0010:[<ffffffff825ca92d>]  [<ffffffff825ca92d>] loop_validate_file+0x20d/0x400 drivers/block/loop.c:656
RSP: 0018:ffff8801a5c2fc80  EFLAGS: 00010206
RAX: 0000000000000036 RBX: dffffc0000000000 RCX: ffffc90000142000
RDX: 000000000000008e RSI: ffffffff825ca8fd RDI: 00000000000001b0
RBP: ffff8801a5c2fc98 R08: ffff8801b8a2d110 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff10037145a1d R12: 0000000000000000
R13: ffff8801d9c16d40 R14: ffff8801d9c16d40 R15: ffff8801d3ff8a58
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f56fcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000033621000 CR3: 00000001a2c3f000 CR4: 00000000001606f0
Stack:
 ffff8801d3ff8900 0000000000004c00 ffff8801ca4acc00 ffff8801a5c2fd20
 ffffffff825d0337 00000000ffffffff ffff8801a5c2fe78 ffff8801d4220f30
 0000000000000001 ffff8801d3f44000 ffff8801d3ff8a50 c52960dbf93802b6
Call Trace:
 [<ffffffff825d0337>] loop_set_fd drivers/block/loop.c:909 [inline]
 [<ffffffff825d0337>] lo_ioctl+0x6a7/0x1690 drivers/block/loop.c:1356
 [<ffffffff825d13d2>] lo_compat_ioctl+0xb2/0x140 drivers/block/loop.c:1549
 [<ffffffff81ea9fd5>] compat_blkdev_ioctl+0x3a5/0x3ad0 block/compat_ioctl.c:751
 [<ffffffff816923f6>] C_SYSC_ioctl fs/compat_ioctl.c:1602 [inline]
 [<ffffffff816923f6>] compat_SyS_ioctl+0x126/0x1fe0 fs/compat_ioctl.c:1549
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff83a023d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f7 01 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 cc 01 00 00 4d 8b a4 24 b0 01 00 00 4c 89 e0 
RIP  [<ffffffff825ca92d>] loop_validate_file+0x20d/0x400 drivers/block/loop.c:656
 RSP <ffff8801a5c2fc80>
blk_update_request: I/O error, dev loop0, sector 0
blk_update_request: I/O error, dev loop0, sector 3584
Buffer I/O error on dev loop0, logical block 448, lost async page write
---[ end trace 7e8a5d4e255538d0 ]---