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 NOPTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 28930 Comm: syz-executor2 Not tainted 4.14.67+ #1
task: ffff8801b9920000 task.stack: ffff8801bcb38000
RIP: 0010:bdev_get_queue include/linux/blkdev.h:1015 [inline]
RIP: 0010:bdev_logical_block_size include/linux/blkdev.h:1451 [inline]
RIP: 0010:bd_set_size+0x58/0x320 fs/block_dev.c:1396
RSP: 0018:ffff8801bcb3fc78 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff10037324105
RDX: 00000000000000a7 RSI: 0000000000000000 RDI: 0000000000000538
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88019b5da840
R13: ffff88019b5da840 R14: ffff8801be221c48 R15: ffff8801be221e28
FS:  0000000002536940(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202f49bf CR3: 00000001d9eb2003 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 loop_clr_fd+0x465/0xac0 drivers/block/loop.c:1057
 __lo_release drivers/block/loop.c:1618 [inline]
 lo_release+0xfd/0x190 drivers/block/loop.c:1636
 __blkdev_put+0x526/0x6e0 fs/block_dev.c:1783
 blkdev_close+0x86/0xb0 fs/block_dev.c:1855
 __fput+0x25e/0x6f0 fs/file_table.c:210
 task_work_run+0x116/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x12e/0x150 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
 do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x410c51
RSP: 002b:00007fffdb301830 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 0000000000410c51
RDX: 0000000000000000 RSI: 0000000000731d00 RDI: 0000000000000012
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffffffffffff
R10: 00000000009300a0 R11: 0000000000000293 R12: 000000000000001b
R13: 00000000000568bf R14: 000000000000026c R15: badc0ffeebadface
Code: 03 80 3c 02 00 0f 85 a4 02 00 00 49 8b 9c 24 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 38 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 70 02 00 00 4d 8d 6c 24 08 48 8b 9b 38 05 00 
RIP: bdev_get_queue include/linux/blkdev.h:1015 [inline] RSP: ffff8801bcb3fc78
RIP: bdev_logical_block_size include/linux/blkdev.h:1451 [inline] RSP: ffff8801bcb3fc78
RIP: bd_set_size+0x58/0x320 fs/block_dev.c:1396 RSP: ffff8801bcb3fc78
---[ end trace 31d16885f3823444 ]---