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: 0 PID: 6081 Comm: syz-executor7 Not tainted 4.9.98-g9731a2d #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d3c0c800 task.stack: ffff8801d0040000
RIP: 0010:[<ffffffff825c8ba7>]  [<ffffffff825c8ba7>] loop_set_fd drivers/block/loop.c:886 [inline]
RIP: 0010:[<ffffffff825c8ba7>]  [<ffffffff825c8ba7>] lo_ioctl+0x1517/0x1aa0 drivers/block/loop.c:1347
RSP: 0018:ffff8801d0047b08  EFLAGS: 00010206
RAX: 0000000000000036 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 000000000000008c RSI: ffffffff825c8b66 RDI: 00000000000001b0
RBP: ffff8801d0047b80 R08: ffff8801d3c0d110 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff1003a781a1d R12: ffff8801d9c11890
R13: ffff8801d9c11140 R14: ffff8801d39d5b00 R15: ffff8801d39d5c58
FS:  00007f39c9e78700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004db518 CR3: 00000001d3934000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 000000000072b000 ffff8801d39d5c50 ffff8801d0046000
 ffff8801d0047b80 ffff8801d9c11a88 ffff8801d3168600 ffff8801d9c11220
 000000000002001d 0000000100000000 ffff8801d9c11140 1ffff1003a008f73
Call Trace:
 [<ffffffff81e54ae6>] __blkdev_driver_ioctl block/ioctl.c:294 [inline]
 [<ffffffff81e54ae6>] blkdev_ioctl+0x7b6/0x1a70 block/ioctl.c:590
 [<ffffffff816301ee>] block_ioctl+0xde/0x120 fs/block_dev.c:1688
 [<ffffffff815b03dc>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815b03dc>] file_ioctl fs/ioctl.c:493 [inline]
 [<ffffffff815b03dc>] do_vfs_ioctl+0x1ac/0x11a0 fs/ioctl.c:677
 [<ffffffff815b145f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815b145f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: e8 03 80 3c 08 00 0f 85 92 02 00 00 48 8b 9b f0 00 00 00 48 b9 00 00 00 00 00 fc ff df 48 8d bb b0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 bf 03 00 00 48 8b 9b b0 01 00 00 48 b9 00 00 
RIP  [<ffffffff825c8ba7>] loop_set_fd drivers/block/loop.c:886 [inline]
RIP  [<ffffffff825c8ba7>] lo_ioctl+0x1517/0x1aa0 drivers/block/loop.c:1347
 RSP <ffff8801d0047b08>
---[ end trace 86ebb5956458b228 ]---