F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
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
Modules linked in:
CPU: 0 PID: 6784 Comm: syz-executor0 Not tainted 4.14.80+ #5
task: ffff88019b3eaf00 task.stack: ffff88019abe8000
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:ffff88019abefa48 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1003367d6e5
RDX: 00000000000000a7 RSI: 0000000000000000 RDI: 0000000000000538
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d53de1c0
R13: ffff8801d53de1c0 R14: ffff8801c6034ec8 R15: ffff8801c60350a8
FS:  00007ff022f3e700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000721830 CR3: 00000001d2d40002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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
 kill_f2fs_super+0x203/0x2f0 fs/f2fs/super.c:3479
 deactivate_locked_super+0x6e/0xd0 fs/super.c:319
 mount_bdev+0x30f/0x370 fs/super.c:1151
 mount_fs+0x28f/0x31a fs/super.c:1255
 vfs_kern_mount.part.9+0xce/0x4a0 fs/namespace.c:1056
 vfs_kern_mount fs/namespace.c:1038 [inline]
 do_new_mount fs/namespace.c:2561 [inline]
 do_mount+0x404/0x26e0 fs/namespace.c:2891
 SYSC_mount fs/namespace.c:3107 [inline]
 SyS_mount+0xe5/0x100 fs/namespace.c:3084
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457569
RSP: 002b:00007ff022f3dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000020000680
RBP: 000000000072bf00 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff022f3e6d4
R13: 00000000004c2b0c R14: 00000000004d4260 R15: 00000000ffffffff
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: ffff88019abefa48
RIP: bdev_logical_block_size include/linux/blkdev.h:1451 [inline] RSP: ffff88019abefa48
RIP: bd_set_size+0x58/0x320 fs/block_dev.c:1396 RSP: ffff88019abefa48
---[ end trace 03a197fe2b5002be ]---