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: 6379 Comm: syz-executor6 Not tainted 4.9.85-ge0b05e6 #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d966c800 task.stack: ffff8801d4ef0000
RIP: 0010:[<ffffffff824b7e08>]  [<ffffffff824b7e08>] loop_set_fd drivers/block/loop.c:894 [inline]
RIP: 0010:[<ffffffff824b7e08>]  [<ffffffff824b7e08>] lo_ioctl+0x5a8/0x1990 drivers/block/loop.c:1340
RSP: 0018:ffff8801d4ef7c98  EFLAGS: 00010206
RAX: 0000000000000036 RBX: dffffc0000000000 RCX: ffffffff824b7dd8
RDX: 000000000000008f RSI: ffffc900039f3000 RDI: 00000000000001b0
RBP: ffff8801d4ef7d18 R08: 1ffff1003b2cda1a R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801d966c800 R12: 0000000000000000
R13: ffff8801d6597a80 R14: 0000000000000000 R15: ffff8801b60c8000
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f6fc1b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f6fbedb0 CR3: 00000001c919e000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffff8801d9be79c0 ffff8801d4ef6000 ffff8801d6597bd0
 ffff880100700000 ffff8801d9c16b00 ffff8801d9c16910 ffff8801d999b000
 ffff8801b60c80e0 000000000002001d ffff8801d6597bd8 ffff8801b60c8000
Call Trace:
 [<ffffffff824b929b>] lo_compat_ioctl+0xab/0x140 drivers/block/loop.c:1533
 [<ffffffff81d894b3>] compat_blkdev_ioctl+0x3e3/0x3c10 block/compat_ioctl.c:751
 [<ffffffff8167d3cf>] C_SYSC_ioctl fs/compat_ioctl.c:1602 [inline]
 [<ffffffff8167d3cf>] compat_SyS_ioctl+0x15f/0x2050 fs/compat_ioctl.c:1549
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b6b10>] 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 ee 12 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 e4 12 00 00 4d 8b a4 24 b0 01 00 00 4c 89 e0 
RIP  [<ffffffff824b7e08>] loop_set_fd drivers/block/loop.c:894 [inline]
RIP  [<ffffffff824b7e08>] lo_ioctl+0x5a8/0x1990 drivers/block/loop.c:1340
 RSP <ffff8801d4ef7c98>
---[ end trace fffa4549f1e62515 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..