BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 10759 Comm: syz.4.1742 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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
 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
 read_mems_allowed_begin include/linux/cpuset.h:153 [inline]
 get_any_partial mm/slub.c:2292 [inline]
 get_partial mm/slub.c:2334 [inline]
 ___slab_alloc+0x808/0xe98 mm/slub.c:3131
 __slab_alloc+0x74/0xd0 mm/slub.c:3240
 slab_alloc_node mm/slub.c:3325 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x298/0x308 mm/slub.c:3383
 alloc_extent_state+0x34/0x41c fs/btrfs/extent-io-tree.c:146
 __set_extent_bit+0x214/0x1964 fs/btrfs/extent-io-tree.c:979
 set_extent_bit+0x58/0x70 fs/btrfs/extent-io-tree.c:1171
 set_extent_dirty fs/btrfs/extent-io-tree.h:182 [inline]
 btrfs_update_block_group+0x5c4/0x968 fs/btrfs/block-group.c:3491
 do_free_extent_accounting fs/btrfs/extent-tree.c:2873 [inline]
 __btrfs_free_extent+0xda4/0x22ac fs/btrfs/extent-tree.c:3205
 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+0xbb4/0x32f4 fs/btrfs/extent-tree.c:2032
 btrfs_run_delayed_refs+0x124/0x46c fs/btrfs/extent-tree.c:2163
 commit_cowonly_roots+0x550/0x71c fs/btrfs/transaction.c:1328
 btrfs_commit_transaction+0x10e8/0x2884 fs/btrfs/transaction.c:2444
 btrfs_sync_file+0xae4/0xf74 fs/btrfs/file.c:2022
 vfs_fsync_range+0x168/0x188 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2962 [inline]
 btrfs_do_write_iter+0x828/0x10ac fs/btrfs/file.c:1691
 btrfs_file_write_iter+0x2c/0x3c fs/btrfs/file.c:1705
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3ec/0x7f0 fs/read_write.c:584
 ksys_write+0x12c/0x224 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __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