el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent-tree.c:3299!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4634 Comm: syz.2.73 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : btrfs_free_tree_block+0xa50/0xa84 fs/btrfs/extent-tree.c:3299
lr : btrfs_free_tree_block+0xa50/0xa84 fs/btrfs/extent-tree.c:3299
sp : ffff8000214c7360
x29: ffff8000214c7460 x28: ffff700004298e74 x27: ffff000000000005
x26: ffff8000214c73c0 x25: 00000000fffffff4 x24: ffff0000cbc73290
x23: 0000000000000001 x22: ffff000000000100 x21: ffff0000cbc73178
x20: dfff800000000000 x19: ffff0000cbc73170 x18: ffff800011b8bf60
x17: 0000000000000000 x16: ffff8000082d9364 x15: 0000000000000000
x14: 0000000000000001 x13: 1ffff00002a98f96 x12: 0000000000ff0100
x11: ff00800009f36768 x10: 0000000000000000 x9 : ffff800009f36768
x8 : ffff0000c4b95340 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000214c6a38 x4 : 00000000ffffffff x3 : 0000000000000c40
x2 : ffff0000cb816000 x1 : 00000000fffffff4 x0 : 0000000000000000
Call trace:
 btrfs_free_tree_block+0xa50/0xa84 fs/btrfs/extent-tree.c:3299
 btrfs_force_cow_block+0xb30/0x188c fs/btrfs/ctree.c:505
 btrfs_cow_block+0x2d0/0x708 fs/btrfs/ctree.c:623
 btrfs_search_slot+0xa50/0x237c fs/btrfs/ctree.c:-1
 btrfs_lookup_match_dir fs/btrfs/dir-item.c:181 [inline]
 btrfs_lookup_dir_item+0x140/0x258 fs/btrfs/dir-item.c:219
 __btrfs_unlink_inode+0x128/0x7bc fs/btrfs/inode.c:4316
 btrfs_unlink_inode fs/btrfs/inode.c:4406 [inline]
 btrfs_unlink+0x18c/0x300 fs/btrfs/inode.c:4459
 vfs_unlink+0x2e0/0x4f4 fs/namei.c:4330
 do_unlinkat+0x328/0x500 fs/namei.c:4398
 __do_sys_unlinkat fs/namei.c:4441 [inline]
 __se_sys_unlinkat fs/namei.c:4434 [inline]
 __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4434
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 17fffe90 9795d345 d4210000 9795d343 (d4210000) 
---[ end trace 0000000000000000 ]---