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: 4431 Comm: syz.0.6 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+0x9e4/0xa1c fs/btrfs/extent-tree.c:3299
lr : btrfs_free_tree_block+0x9e4/0xa1c fs/btrfs/extent-tree.c:3299
sp : ffff8000213e6980
x29: ffff8000213e6a80 x28: ffff0000cc485360 x27: ffff000000000002
x26: ffff8000213e69e0 x25: 00000000fffffff4 x24: ffff0000cc485480
x23: 0000000000000001 x22: 1fffe00019890a90 x21: ffff0000cc485368
x20: dfff800000000000 x19: ffff0000cc485360 x18: ffff800011a5bd40
x17: 0000000000000000 x16: ffff8000082d3a08 x15: 0000000000000000
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100
x11: ff00800009f03a00 x10: 0000000000000000 x9 : ffff800009f03a00
x8 : ffff0000d5c28000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000213e6058 x4 : 00000000ffffffff x3 : 0000000000000c40
x2 : ffff0000d6fa5c80 x1 : 00000000fffffff4 x0 : 0000000000000000
Call trace:
 btrfs_free_tree_block+0x9e4/0xa1c fs/btrfs/extent-tree.c:3299
 btrfs_force_cow_block+0xb20/0x187c fs/btrfs/ctree.c:505
 btrfs_cow_block+0x2d0/0x710 fs/btrfs/ctree.c:623
 btrfs_search_slot+0xa54/0x2364 fs/btrfs/ctree.c:2087
 lookup_inline_extent_backref+0x28c/0xe78 fs/btrfs/extent-tree.c:847
 lookup_extent_backref fs/btrfs/extent-tree.c:1074 [inline]
 __btrfs_free_extent+0x21c/0x2320 fs/btrfs/extent-tree.c:2984
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1696 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1720 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1969 [inline]
 __btrfs_run_delayed_refs+0xba4/0x3280 fs/btrfs/extent-tree.c:2032
 btrfs_run_delayed_refs+0x124/0x47c fs/btrfs/extent-tree.c:2163
 btrfs_commit_transaction+0x1d4/0x29f0 fs/btrfs/transaction.c:2174
 try_flush_qgroup+0x228/0x314 fs/btrfs/qgroup.c:3778
 __btrfs_qgroup_reserve_meta+0x68/0xc4 fs/btrfs/qgroup.c:4075
 btrfs_qgroup_reserve_meta_prealloc fs/btrfs/qgroup.h:384 [inline]
 start_transaction+0x254/0x104c fs/btrfs/transaction.c:592
 btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:766
 btrfs_create_common+0x13c/0x224 fs/btrfs/inode.c:6785
 btrfs_create+0x104/0x128 fs/btrfs/inode.c:6831
 vfs_create+0x2bc/0x438 fs/namei.c:3192
 do_mknodat+0x360/0x54c fs/namei.c:4043
 __do_sys_mknodat fs/namei.c:4071 [inline]
 __se_sys_mknodat fs/namei.c:4068 [inline]
 __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4068
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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: 17fffea4 97967dc3 d4210000 97967dc1 (d4210000) 
---[ end trace 0000000000000000 ]---