kernel BUG at fs/btrfs/extent-tree.c:3460!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 18093 Comm: syz-executor.1 Not tainted 6.7.0-rc6-syzkaller-00078-ga4aebe936554 #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+0x7e4/0xbe0 fs/btrfs/extent-tree.c:3460
Code: fc fd 31 ff 89 c5 89 c6 e8 49 eb 13 fe 40 84 ed 0f 85 e6 fb ff ff e8 0b f0 13 fe 90 0f 0b 90 e9 d8 fb ff ff e8 fd ef 13 fe 90 <0f> 0b e8 f5 ef 13 fe 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90006c0f608 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88802243e3b0 RCX: ffffc90003c01000
RDX: 0000000000040000 RSI: ffffffff83727483 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000008 R12: ffff88803b8ae730
R13: ffff88802243e3b8 R14: 00000000fffffff4 R15: 0000000000000001
FS:  00007f50f823a6c0(0000) GS:ffff88806b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559bf50b3a58 CR3: 00000001149a4000 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:618
 btrfs_cow_block+0x2b6/0xb30 fs/btrfs/ctree.c:741
 commit_cowonly_roots+0x18b/0xa60 fs/btrfs/transaction.c:1378
 btrfs_commit_transaction+0x1382/0x3b40 fs/btrfs/transaction.c:2485
 btrfs_commit_super+0xc5/0x100 fs/btrfs/disk-io.c:4179
 btrfs_remount+0xe0c/0x17b0 fs/btrfs/super.c:1759
 legacy_reconfigure+0x119/0x180 fs/fs_context.c:685
 reconfigure_super+0x44f/0xb10 fs/super.c:1143
 do_remount fs/namespace.c:2884 [inline]
 path_mount+0x16f2/0x1ed0 fs/namespace.c:3656
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount fs/namespace.c:3863 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f50f747e3ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f50f8239ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f50f8239f80 RCX: 00007f50f747e3ea
RDX: 0000000020000180 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 0000000020000180 R08: 00007f50f8239f80 R09: 0000000001a404ad
R10: 0000000001a404ad R11: 0000000000000202 R12: 0000000020000100
R13: 00007f50f8239f40 R14: 0000000000000000 R15: 00000000200002c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_free_tree_block+0x7e4/0xbe0 fs/btrfs/extent-tree.c:3460
Code: fc fd 31 ff 89 c5 89 c6 e8 49 eb 13 fe 40 84 ed 0f 85 e6 fb ff ff e8 0b f0 13 fe 90 0f 0b 90 e9 d8 fb ff ff e8 fd ef 13 fe 90 <0f> 0b e8 f5 ef 13 fe 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90006c0f608 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88802243e3b0 RCX: ffffc90003c01000
RDX: 0000000000040000 RSI: ffffffff83727483 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000008 R12: ffff88803b8ae730
R13: ffff88802243e3b8 R14: 00000000fffffff4 R15: 0000000000000001
FS:  00007f50f823a6c0(0000) GS:ffff88806b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559bf50b3a58 CR3: 00000001149a4000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400