RSP: 002b:00007f19b57e0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f19b780ffa0 RCX: 00007f19b7589b19
RDX: 00000000000001ff RSI: 0000200000007a40 RDI: ffffffffffffff9c
RBP: 00007f19b7621b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f19b7810038 R14: 00007f19b780ffa0 R15: 00007ffee710e7b8
 </TASK>
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent-tree.c:3311!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4614 Comm: syz.4.50 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:btrfs_free_tree_block+0xb71/0xb80 fs/btrfs/extent-tree.c:3311
Code: e9 02 f9 ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 07 f9 ff ff be 08 00 00 00 4c 89 e7 e8 69 fb 78 fe e9 f5 f8 ff ff e8 6f b2 33 fe <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 55
RSP: 0018:ffffc9000456f5a0 EFLAGS: 00010283
RAX: ffffffff83457b21 RBX: 1ffff1100f2bd9d6 RCX: 0000000000080000
RDX: ffffc9000c691000 RSI: 000000000006711b RDI: 000000000006711c
RBP: ffffc9000456f6f0 R08: ffffffff910471ff R09: 1ffffffff2208e3f
R10: dffffc0000000000 R11: fffffbfff2208e40 R12: ffff888055275064
R13: ffff8880795eceb0 R14: 00000000fffffff4 R15: 0000000000000005
FS:  00007f19b57e06c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ebc18e000 CR3: 0000000055f7a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_force_cow_block+0xc4d/0x1760 fs/btrfs/ctree.c:480
 btrfs_cow_block+0x33e/0x7d0 fs/btrfs/ctree.c:598
 btrfs_search_slot+0x9d4/0x2090 fs/btrfs/ctree.c:-1
 btrfs_insert_empty_items+0x32c/0x3e0 fs/btrfs/ctree.c:4012
 btrfs_new_inode+0x908/0x1830 fs/btrfs/inode.c:6674
 btrfs_mkdir+0x2ac/0x5b0 fs/btrfs/inode.c:7072
 vfs_mkdir+0x386/0x570 fs/namei.c:4116
 do_mkdirat+0x1dd/0x5c0 fs/namei.c:4141
 __do_sys_mkdirat fs/namei.c:4156 [inline]
 __se_sys_mkdirat fs/namei.c:4154 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4154
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f19b7589b19
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f19b57e0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f19b780ffa0 RCX: 00007f19b7589b19
RDX: 00000000000001ff RSI: 0000200000007a40 RDI: ffffffffffffff9c
RBP: 00007f19b7621b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f19b7810038 R14: 00007f19b780ffa0 R15: 00007ffee710e7b8
 </TASK>
Modules linked in:
---[ end trace 9019c6425d5f9653 ]---
RIP: 0010:btrfs_free_tree_block+0xb71/0xb80 fs/btrfs/extent-tree.c:3311
Code: e9 02 f9 ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 07 f9 ff ff be 08 00 00 00 4c 89 e7 e8 69 fb 78 fe e9 f5 f8 ff ff e8 6f b2 33 fe <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 55
RSP: 0018:ffffc9000456f5a0 EFLAGS: 00010283
RAX: ffffffff83457b21 RBX: 1ffff1100f2bd9d6 RCX: 0000000000080000
RDX: ffffc9000c691000 RSI: 000000000006711b RDI: 000000000006711c
RBP: ffffc9000456f6f0 R08: ffffffff910471ff R09: 1ffffffff2208e3f
R10: dffffc0000000000 R11: fffffbfff2208e40 R12: ffff888055275064
R13: ffff8880795eceb0 R14: 00000000fffffff4 R15: 0000000000000005
FS:  00007f19b57e06c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ebc18e000 CR3: 0000000055f7a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400