------------[ cut here ]------------
kernel BUG at fs/btrfs/volumes.c:1063!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 25789 Comm: syz-executor.5 Not tainted 4.19.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:btrfs_close_one_device fs/btrfs/volumes.c:1063 [inline]
RIP: 0010:close_fs_devices.part.0+0x67b/0x860 fs/btrfs/volumes.c:1082
Code: 48 8b 44 24 10 c7 80 10 01 00 00 00 00 00 00 48 83 c4 40 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 6c b6 71 fe 0f 0b e8 65 b6 71 fe <0f> 0b e8 ee 8a a7 fe e9 f8 fb ff ff 4c 89 f7 e8 e1 8a a7 fe e9 12
RSP: 0018:ffff8880496cf840 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880a4bf8900 RCX: ffffc90010695000
RDX: 0000000000040000 RSI: ffffffff82f0dc2b RDI: 0000000000000282
RBP: ffff8880ab1315d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880a4bf8920 R15: ffff8880aad19b00
FS:  00007fc74403d700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000219d848 CR3: 0000000047272000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 close_fs_devices fs/btrfs/volumes.c:1114 [inline]
 btrfs_close_devices+0x95/0x1f0 fs/btrfs/volumes.c:1100
 btrfs_mount_root+0x10b9/0x1830 fs/btrfs/super.c:1630
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount+0x3c/0x60 fs/namespace.c:951
 btrfs_mount+0x23a/0xaa0 fs/btrfs/super.c:1681
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2483 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2813
 ksys_mount+0xcf/0x130 fs/namespace.c:3029
 __do_sys_mount fs/namespace.c:3043 [inline]
 __se_sys_mount fs/namespace.c:3040 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3040
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x467b0a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc74403cfa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000200009c0 RCX: 0000000000467b0a
RDX: 0000000020000040 RSI: 0000000020000100 RDI: 00007fc74403d000
RBP: 00007fc74403d040 R08: 00007fc74403d040 R09: 0000000020000040
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000040
R13: 0000000020000100 R14: 00007fc74403d000 R15: 0000000020000000
Modules linked in:
---[ end trace 06b566acb30baff3 ]---
RIP: 0010:btrfs_close_one_device fs/btrfs/volumes.c:1063 [inline]
RIP: 0010:close_fs_devices.part.0+0x67b/0x860 fs/btrfs/volumes.c:1082
Code: 48 8b 44 24 10 c7 80 10 01 00 00 00 00 00 00 48 83 c4 40 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 6c b6 71 fe 0f 0b e8 65 b6 71 fe <0f> 0b e8 ee 8a a7 fe e9 f8 fb ff ff 4c 89 f7 e8 e1 8a a7 fe e9 12
RSP: 0018:ffff8880496cf840 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880a4bf8900 RCX: ffffc90010695000
RDX: 0000000000040000 RSI: ffffffff82f0dc2b RDI: 0000000000000282
RBP: ffff8880ab1315d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880a4bf8920 R15: ffff8880aad19b00
FS:  00007fc74403d700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000499c40 CR3: 0000000047272000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 8b 44 24 10       	mov    0x10(%rsp),%rax
   5:	c7 80 10 01 00 00 00 	movl   $0x0,0x110(%rax)
   c:	00 00 00 
   f:	48 83 c4 40          	add    $0x40,%rsp
  13:	5b                   	pop    %rbx
  14:	5d                   	pop    %rbp
  15:	41 5c                	pop    %r12
  17:	41 5d                	pop    %r13
  19:	41 5e                	pop    %r14
  1b:	41 5f                	pop    %r15
  1d:	c3                   	retq   
  1e:	e8 6c b6 71 fe       	callq  0xfe71b68f
  23:	0f 0b                	ud2    
  25:	e8 65 b6 71 fe       	callq  0xfe71b68f
  2a:	0f 0b                	ud2     <-- trapping instruction
  2c:	e8 ee 8a a7 fe       	callq  0xfea78b1f
  31:	e9 f8 fb ff ff       	jmpq   0xfffffc2e
  36:	4c 89 f7             	mov    %r14,%rdi
  39:	e8 e1 8a a7 fe       	callq  0xfea78b1f
  3e:	e9                   	.byte 0xe9
  3f:	12                   	.byte 0x12