kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 24964 Comm: syz-executor7 Not tainted 4.14.0-mm1+ #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d3e68540 task.stack: ffff8801c7250000
RIP: 0010:bdev_get_queue include/linux/blkdev.h:994 [inline]
RIP: 0010:bdev_logical_block_size include/linux/blkdev.h:1432 [inline]
RIP: 0010:bd_set_size+0x5f/0x330 fs/block_dev.c:1383
RSP: 0018:ffff8801c72579a0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81be126c
RDX: 00000000000000c0 RSI: ffffc90004108000 RDI: 0000000000000600
RBP: ffff8801c72579d0 R08: 1ffff10038e4aed9 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88018cd042c0
R13: 0000000000000000 R14: ffff8801c84f5200 R15: ffff8801c84f5558
FS:  00007f6662e08700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd714e8c000 CR3: 00000001c1eb0000 CR4: 00000000001426e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 loop_clr_fd+0x4fc/0xb50 drivers/block/loop.c:1053
 lo_ioctl+0x131f/0x1b90 drivers/block/loop.c:1365
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601
 block_ioctl+0xea/0x130 fs/block_dev.c:1860
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452879
RSP: 002b:00007f6662e07be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000018
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5590
R13: 00000000ffffffff R14: 00007f6662e086d4 R15: 0000000000000000
Code: 03 80 3c 02 00 0f 85 c6 02 00 00 49 8b 9c 24 f0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 00 06 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 76 02 00 00 4d 8d 74 24 08 48 b8 00 00 00 00 
RIP: bdev_get_queue include/linux/blkdev.h:994 [inline] RSP: ffff8801c72579a0
RIP: bdev_logical_block_size include/linux/blkdev.h:1432 [inline] RSP: ffff8801c72579a0
RIP: bd_set_size+0x5f/0x330 fs/block_dev.c:1383 RSP: ffff8801c72579a0
---[ end trace 9da9b0d1d7ebfb43 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..