hid-generic 0000:0000:0000.000A: unknown main item tag 0x0
hid-generic 0000:0000:0000.000A: unknown main item tag 0x0
hid-generic 0000:0000:0000.000A: unknown main item tag 0x0
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
Modules linked in:
CPU: 0 PID: 5570 Comm: syz-executor0 Not tainted 4.4.171+ #11
task: ffff8800b76ec740 task.stack: ffff8801bd868000
RIP: 0010:[<ffffffff81d3c6e6>]  [<ffffffff81d3c6e6>] is_loop_device drivers/block/loop.c:656 [inline]
RIP: 0010:[<ffffffff81d3c6e6>]  [<ffffffff81d3c6e6>] loop_validate_file+0x206/0x2d0 drivers/block/loop.c:667
RSP: 0018:ffff8801bd86fb18  EFLAGS: 00010206
RAX: 0000000000000036 RBX: ffff8801da017a60 RCX: ffffc90000d1f000
RDX: 0000000000000092 RSI: ffffffff81d3c6b5 RDI: 00000000000001b0
RBP: ffff8801bd86fb38 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8800bb649700 R14: dffffc0000000000 R15: 00000000fffffff0
FS:  0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f5502b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000814579c CR3: 00000001d9333000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b9766000 ffff8801d8f76d00 ffff8801d8f76e58 ffff8800bb649700
 ffff8801bd86fbc8 ffffffff81d4659b ffff8800b76ed000 ffff8800b76ed028
 ffffffff00000001 ffffffff00000002 c13968954179b33e 1ffff10037b0df7a
Call Trace:
 [<ffffffff81d4659b>] loop_set_fd drivers/block/loop.c:920 [inline]
 [<ffffffff81d4659b>] lo_ioctl+0x9ab/0x1b40 drivers/block/loop.c:1418
 [<ffffffff81d477dd>] lo_compat_ioctl+0xad/0x140 drivers/block/loop.c:1617
 [<ffffffff81aa6a80>] compat_blkdev_ioctl+0xca0/0x344f block/compat_ioctl.c:751
 [<ffffffff8159ac13>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff8159ac13>] compat_SyS_ioctl+0x403/0x2210 fs/compat_ioctl.c:1544
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff827193d0>] sysenter_flags_fixed+0xd/0x1a
Code: 00 00 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 d4 00 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 <42> 80 3c 30 00 0f 85 a8 00 00 00 4d 8b a4 24 b0 01 00 00 4c 89 
RIP  [<ffffffff81d3c6e6>] is_loop_device drivers/block/loop.c:656 [inline]
RIP  [<ffffffff81d3c6e6>] loop_validate_file+0x206/0x2d0 drivers/block/loop.c:667
 RSP <ffff8801bd86fb18>
---[ end trace a24d7957f5b0e546 ]---