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kernel BUG at fs/btrfs/extent-tree.c:3462!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 26714 Comm: syz-executor.2 Not tainted 6.8.0-rc1-syzkaller-00169-gecb1b8288dc7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:btrfs_free_tree_block+0x841/0xb60 fs/btrfs/extent-tree.c:3462
Code: 02 00 00 48 8b 13 41 b8 01 00 00 00 4c 89 e7 48 89 ee e8 92 82 fe ff 48 89 ef e8 da c7 26 00 e9 78 fb ff ff e8 80 57 0f fe 90 <0f> 0b e8 78 57 0f fe 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900299972f8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff888065f44d90 RCX: ffffc90006d43000
RDX: 0000000000040000 RSI: ffffffff8377b4f0 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 000000000000000a R12: ffff8880218d5d40
R13: ffff888065f44d98 R14: 00000000fffffff4 R15: 0000000000000001
FS:  00007f3bd8c566c0(0000) GS:ffff88806b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd36b8d66e4 CR3: 000000011a679000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_force_cow_block+0xfe3/0x19e0 fs/btrfs/ctree.c:626
 btrfs_cow_block+0x2b6/0xb30 fs/btrfs/ctree.c:749
 create_pending_snapshot+0xf8a/0x32d0 fs/btrfs/transaction.c:1826
 create_pending_snapshots+0x17e/0x2d0 fs/btrfs/transaction.c:1965
 btrfs_commit_transaction+0x1272/0x3b40 fs/btrfs/transaction.c:2438
 create_snapshot fs/btrfs/ioctl.c:848 [inline]
 btrfs_mksubvol+0xb0e/0x1360 fs/btrfs/ioctl.c:998
 btrfs_mksnapshot+0xad/0xf0 fs/btrfs/ioctl.c:1044
 __btrfs_ioctl_snap_create+0x491/0x540 fs/btrfs/ioctl.c:1306
 btrfs_ioctl_snap_create+0x168/0x200 fs/btrfs/ioctl.c:1333
 btrfs_ioctl+0x52f/0x61e0 fs/btrfs/ioctl.c:4592
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f3bd7e7cda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3bd8c560c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3bd7fabf80 RCX: 00007f3bd7e7cda9
RDX: 0000000020000480 RSI: 0000000050009401 RDI: 0000000000000004
RBP: 00007f3bd8c56120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f3bd7fabf80 R15: 00007ffcf3101068
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_free_tree_block+0x841/0xb60 fs/btrfs/extent-tree.c:3462
Code: 02 00 00 48 8b 13 41 b8 01 00 00 00 4c 89 e7 48 89 ee e8 92 82 fe ff 48 89 ef e8 da c7 26 00 e9 78 fb ff ff e8 80 57 0f fe 90 <0f> 0b e8 78 57 0f fe 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900299972f8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff888065f44d90 RCX: ffffc90006d43000
RDX: 0000000000040000 RSI: ffffffff8377b4f0 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 000000000000000a R12: ffff8880218d5d40
R13: ffff888065f44d98 R14: 00000000fffffff4 R15: 0000000000000001
FS:  00007f3bd8c566c0(0000) GS:ffff88806b700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200014c0 CR3: 000000011a679000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400