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: 8691 Comm: syz-executor6 Not tainted 4.9.113-g47bbcd6 #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019ff39800 task.stack: ffff8801b5d58000
RIP: 0010:[<ffffffff81934d01>]  [<ffffffff81934d01>] process_init_reply+0xc21/0x11e0 fs/fuse/inode.c:919
RSP: 0018:ffff8801b5d5f890  EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffff88019f9fe600 RCX: 00000000000000fa
RDX: dffffc0000000000 RSI: ffffffff81934cc0 RDI: 00000000000007d0
RBP: ffff8801b5d5f8c8 R08: ffff88019ff3a110 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cb7b6248
R13: ffff88019f9fe7db R14: ffff88019f9fe7d4 R15: 0000000000000005
FS:  00007fd916009700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffffef56e98 CR3: 00000001d823d000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801b5d5f8c8 0000000000000000 ffff8801cb7b6248 ffff88019f9fe600
 ffffffff819340e0 ffff88019f9fe720 ffff88019f9fe778 ffff8801b5d5f900
 ffffffff8190c6d3 ffff8801cb7b6248 0000000000000000 ffff8801b5d5fbd0
Call Trace:
 [<ffffffff8190c6d3>] request_end+0x173/0x610 fs/fuse/dev.c:397
 [<ffffffff8190dd49>] fuse_dev_do_write+0x1099/0x20a0 fs/fuse/dev.c:1905
 [<ffffffff8190fa8b>] fuse_dev_write+0x14b/0x1e0 fs/fuse/dev.c:1929
 [<ffffffff8156ecb0>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff8156ecb0>] __vfs_write+0x3e0/0x580 fs/read_write.c:509
 [<ffffffff81572aa7>] vfs_write+0x187/0x530 fs/read_write.c:557
 [<ffffffff815768d9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff815768d9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9f93>] 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  [<ffffffff81934d01>] process_init_reply+0xc21/0x11e0 fs/fuse/inode.c:919
 RSP <ffff8801b5d5f890>
FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
---[ end trace 38a3f4b404c446a6 ]---