RBP: 000000000076bf20 R08: 00007f9c95cc2b40 R09: 00007f9c95cc2ae0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000007
R13: 0000000000000bd4 R14: 00000000004cdad4 R15: 0000000000000053
------------[ cut here ]------------
kernel BUG at fs/btrfs/volumes.c:890!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 24586 Comm: syz-executor.0 Not tainted 4.14.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88807fb8a600 task.stack: ffff888050bb8000
RIP: 0010:btrfs_prepare_close_one_device fs/btrfs/volumes.c:890 [inline]
RIP: 0010:__btrfs_close_devices+0x7d8/0xa90 fs/btrfs/volumes.c:915
RSP: 0018:ffff888050bbf700 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880a0ca3b00 RCX: ffffc90006c2b000
RDX: 0000000000040000 RSI: ffffffff8299e4b8 RDI: 0000000000000282
RBP: ffff888050bbf7c8 R08: ffff88807fb8a600 R09: ffff88807fb8aec8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a98e2d40
R13: ffff8880a0ca3bc8 R14: fffffffffffffff4 R15: dffffc0000000000
FS:  00007f9c95cc3700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff9cd20f88 CR3: 00000000a84ee000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 btrfs_close_devices+0x29/0x140 fs/btrfs/volumes.c:948
 btrfs_mount+0x1fd9/0x2b28 fs/btrfs/super.c:1642
 mount_fs+0x97/0x2a1 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount+0x40/0x60 fs/namespace.c:1036
 mount_subvol fs/btrfs/super.c:1392 [inline]
 btrfs_mount+0x3ce/0x2b28 fs/btrfs/super.c:1563
 mount_fs+0x97/0x2a1 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x417/0x27d0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3072
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45ee7a
RSP: 002b:00007f9c95cc2a68 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9c95cc36d4 RCX: 000000000045ee7a
RDX: 00007f9c95cc2ae0 RSI: 00000000200001c0 RDI: 00007f9c95cc2b00
RBP: 000000000076bf20 R08: 00007f9c95cc2b40 R09: 00007f9c95cc2ae0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000007
R13: 0000000000000bd4 R14: 00000000004cdad4 R15: 0000000000000053
Code: c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 59 02 00 00 48 8b 45 80 c7 80 10 01 00 00 00 00 00 00 e9 e2 f8 ff ff e8 a8 e3 c2 fe <0f> 0b e8 a1 e3 c2 fe 0f 0b 48 89 f7 e8 37 73 ed fe e9 ad f8 ff 
RIP: btrfs_prepare_close_one_device fs/btrfs/volumes.c:890 [inline] RSP: ffff888050bbf700
RIP: __btrfs_close_devices+0x7d8/0xa90 fs/btrfs/volumes.c:915 RSP: ffff888050bbf700
---[ end trace 792b056306de5e31 ]---