FAT-fs (loop6): Can't find a valid FAT filesystem
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
FAT-fs (loop6): bogus number of reserved sectors
FAT-fs (loop6): Can't find a valid FAT filesystem
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 11938 Comm: syz-executor4 Not tainted 4.9.124+ #32
task: ffff8801bc0d0000 task.stack: ffff8801a49c8000
RIP: 0010:[<ffffffff8185ec61>]  [<ffffffff8185ec61>] process_init_reply+0xc21/0x11e0 fs/fuse/inode.c:919
RSP: 0018:ffff8801a49cf890  EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffff8801a5c44400 RCX: 00000000000000fa
RDX: dffffc0000000000 RSI: ffffffff8185ec20 RDI: 00000000000007d0
RBP: ffff8801a49cf8c8 R08: ffffed0034939ee4 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000003 R12: ffff8801bcfc3da8
R13: ffff8801a5c445db R14: ffff8801a5c445d4 R15: 000000000000ffff
FS:  00007fa165bf2700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd10bf1dcc CR3: 00000001bc22c000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801a49cf8c8 0000000000000000 ffff8801bcfc3da8 ffff8801a5c44400
 ffffffff8185e040 ffff8801a5c44520 ffff8801a5c44578 ffff8801a49cf900
 ffffffff81835c53 ffff8801bcfc3da8 0000000000000000 ffff8801a49cfbd0
Call Trace:
 [<ffffffff81835c53>] request_end+0x173/0x610 fs/fuse/dev.c:397
 [<ffffffff818372af>] fuse_dev_do_write+0x107f/0x2090 fs/fuse/dev.c:1905
 [<ffffffff81838ff2>] fuse_dev_write+0x142/0x1d0 fs/fuse/dev.c:1929
 [<ffffffff814fab57>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff814fab57>] __vfs_write+0x3d7/0x580 fs/read_write.c:509
 [<ffffffff814fd3a7>] vfs_write+0x187/0x520 fs/read_write.c:557
 [<ffffffff815011d9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff815011d9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff8100554f>] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282
 [<ffffffff8278ba53>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: ea 03 80 3c 02 00 0f 85 1f 04 00 00 48 8b 83 70 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 d0 07 00 00 48 89 f9 48 c1 e9 03 <0f> b6 14 11 84 d2 74 09 80 fa 03 0f 8e f9 03 00 00 44 89 b8 d0 
RIP  [<ffffffff8185ec61>] process_init_reply+0xc21/0x11e0 fs/fuse/inode.c:919
 RSP <ffff8801a49cf890>
---[ end trace e6153a7ecb7e985b ]---