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
------------[ 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: 5897 Comm: syz.3.406 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 : ffff800020e37180
x29: ffff800020e37280 x28: ffff0000f5dd85d0 x27: ffff000000000005
x26: ffff800020e371e0 x25: 00000000fffffff4 x24: ffff0000f5dd86f0
x23: 0000000000000001 x22: 1fffe0001ebbb0de x21: ffff0000f5dd85d8
x20: dfff800000000000 x19: ffff0000f5dd85d0 x18: ffff800011a5bd40
x17: 0000000000000000 x16: ffff8000082d3a08 x15: 0000000000000000
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100
x11: ff00800009f03a00 x10: 0000000000000000 x9 : ffff800009f03a00
x8 : ffff0000d69e5340 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020e36858 x4 : 00000000ffffffff x3 : 0000000000000c40
x2 : ffff0000d6834480 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
 btrfs_insert_empty_items+0xa4/0x178 fs/btrfs/ctree.c:4185
 btrfs_insert_empty_item fs/btrfs/ctree.h:3137 [inline]
 btrfs_insert_inode_ref+0x1ac/0x9f0 fs/btrfs/inode-item.c:325
 btrfs_add_link+0x16c/0x9f8 fs/btrfs/inode.c:6707
 btrfs_link+0x374/0x684 fs/btrfs/inode.c:6882
 vfs_link+0x5b4/0x744 fs/namei.c:4607
 do_linkat+0x234/0x4bc fs/namei.c:4678
 __do_sys_linkat fs/namei.c:4706 [inline]
 __se_sys_linkat fs/namei.c:4703 [inline]
 __arm64_sys_linkat+0xe4/0x100 fs/namei.c:4703
 __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 ]---