BTRFS: device fsid ecf6f2a2-2997-48ae-b81e-1b00920efd9a devid 28 transid 756082810144684242 /dev/loop7
BTRFS error (device loop7): unsupported checksum algorithm 3786
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: 29031 Comm: syz-executor0 Not tainted 4.9.119-g9dc978d #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801a1453000 task.stack: ffff8801bd9c0000
RIP: 0010:[<ffffffff81934e7a>]  [<ffffffff81934e7a>] process_init_reply+0xcea/0x11e0 fs/fuse/inode.c:923
RSP: 0018:ffff8801bd9c7890  EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88019c531100 RCX: 0000000000000001
RDX: 0000000000000020 RSI: ffffffff81934de2 RDI: 0000000000000100
RBP: ffff8801bd9c78c8 R08: ffffed0037b38ee4 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000003 R12: ffff8801ba10f6d0
R13: ffff88019c5312db R14: ffff88019c5312d4 R15: 0000000000000000
FS:  00007f39c26a6700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f355bf7c518 CR3: 00000001d5ea6000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801bd9c78c8 0000000000000000 ffff8801ba10f6d0 ffff88019c531100
 ffffffff81934190 ffff88019c531220 ffff88019c531278 ffff8801bd9c7900
 ffffffff8190c783 ffff8801ba10f6d0 0000000000000000 ffff8801bd9c7bd0
Call Trace:
 [<ffffffff8190c783>] request_end+0x173/0x610 fs/fuse/dev.c:397
 [<ffffffff8190ddf9>] fuse_dev_do_write+0x1099/0x20a0 fs/fuse/dev.c:1905
 [<ffffffff8190fb3b>] fuse_dev_write+0x14b/0x1e0 fs/fuse/dev.c:1929
 [<ffffffff8156f060>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff8156f060>] __vfs_write+0x3e0/0x580 fs/read_write.c:509
 [<ffffffff81572e57>] vfs_write+0x187/0x530 fs/read_write.c:557
 [<ffffffff81576c89>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff81576c89>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839fccd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: ea 03 80 3c 02 00 0f 85 89 03 00 00 4c 8b bb 70 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bf 00 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 04 04 00 00 49 c7 87 00 01 00 00 60 bc 7d 84 
RIP  [<ffffffff81934e7a>] process_init_reply+0xcea/0x11e0 fs/fuse/inode.c:923
 RSP <ffff8801bd9c7890>
---[ end trace 4ac47dee98e086a9 ]---