BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 7163 Comm: syz.0.779 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0xb0/0x10c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 free_extent_buffer+0x184/0x390 fs/btrfs/extent_io.c:6335
 btrfs_release_path+0x10c/0x1c4 fs/btrfs/ctree.c:111
 btrfs_free_path+0x28/0x78 fs/btrfs/ctree.c:89
 btrfs_getxattr+0x204/0x248 fs/btrfs/xattr.c:75
 btrfs_xattr_handler_get+0x50/0x68 fs/btrfs/xattr.c:385
 __vfs_getxattr fs/xattr.c:401 [inline]
 vfs_getxattr+0x544/0x578 fs/xattr.c:434
 ovl_do_getxattr fs/overlayfs/overlayfs.h:195 [inline]
 ovl_getxattr fs/overlayfs/overlayfs.h:207 [inline]
 ovl_get_fh+0x9c/0x458 fs/overlayfs/namei.c:114
 ovl_check_origin fs/overlayfs/namei.c:401 [inline]
 ovl_lookup+0x34c/0x12a4 fs/overlayfs/namei.c:879
 lookup_one_qstr_excl+0x108/0x230 fs/namei.c:1563
 do_unlinkat+0x19c/0x600 fs/namei.c:4332
 __do_sys_unlinkat fs/namei.c:4391 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4384
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584