BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 6608 Comm: syz.6.365 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c 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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 local_lock_acquire+0x4c/0x19c include/linux/local_lock_internal.h:29
 __radix_tree_preload+0x94/0x40c lib/radix-tree.c:332
 radix_tree_preload+0x38/0x54 lib/radix-tree.c:367
 add_free_nid+0x128/0x838 fs/f2fs/node.c:2329
 __flush_nat_entry_set fs/f2fs/node.c:3087 [inline]
 f2fs_flush_nat_entries+0x114c/0x1c78 fs/f2fs/node.c:3162
 f2fs_write_checkpoint+0x1000/0x175c fs/f2fs/checkpoint.c:1692
 f2fs_issue_checkpoint+0x25c/0x39c fs/f2fs/checkpoint.c:1865
 f2fs_sync_fs+0x1dc/0x518 fs/f2fs/super.c:1709
 f2fs_unlink+0x574/0xbb0 fs/f2fs/namei.c:585
 vfs_unlink+0x2e0/0x4f4 fs/namei.c:4330
 ovl_do_unlink fs/overlayfs/overlayfs.h:157 [inline]
 ovl_cleanup+0xdc/0x194 fs/overlayfs/dir.c:34
 ovl_check_rename_whiteout fs/overlayfs/super.c:1323 [inline]
 ovl_make_workdir fs/overlayfs/super.c:1424 [inline]
 ovl_get_workdir+0x894/0x10bc fs/overlayfs/super.c:1539
 ovl_fill_super+0x1390/0x2240 fs/overlayfs/super.c:2095
 mount_nodev+0x68/0x104 fs/super.c:1489
 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3078
 path_mount+0x5bc/0xe80 fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 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