BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6524 Comm: syz.2.333 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 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+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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 debug_object_activate+0x7c/0x468 lib/debugobjects.c:698
 debug_rcu_head_queue kernel/rcu/rcu.h:190 [inline]
 call_rcu+0x54/0x954 kernel/rcu/tree.c:2834
 thread_stack_delayed_free kernel/fork.c:229 [inline]
 free_thread_stack kernel/fork.c:339 [inline]
 release_task_stack kernel/fork.c:526 [inline]
 put_task_stack+0x134/0x1dc kernel/fork.c:533
 finish_task_switch+0x570/0x620 kernel/sched/core.c:5155
 context_switch kernel/sched/core.c:5247 [inline]
 __schedule+0xde0/0x1b18 kernel/sched/core.c:6561
 preempt_schedule_irq+0x8c/0x1b8 kernel/sched/core.c:6873
 arm64_preempt_schedule_irq+0x44/0x58 arch/arm64/kernel/entry-common.c:265
 __el1_irq arch/arm64/kernel/entry-common.c:474 [inline]
 el1_interrupt+0x3c/0x54 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
 read_seqbegin+0x90/0x15c include/linux/seqlock.h:893
 zone_span_seqbegin include/linux/memory_hotplug.h:132 [inline]
 page_outside_zone_boundaries mm/page_alloc.c:627 [inline]
 bad_range+0x9c/0x260 mm/page_alloc.c:654
 rmqueue mm/page_alloc.c:3887 [inline]
 get_page_from_freelist+0x1e70/0x1fc0 mm/page_alloc.c:4325
 __alloc_pages+0x1cc/0x53c mm/page_alloc.c:5614
 alloc_pages+0x434/0x6f8 mm/mempolicy.c:-1
 folio_alloc+0x28/0x6c mm/mempolicy.c:2292
 filemap_alloc_folio+0xc4/0x428 mm/filemap.c:999
 page_cache_ra_unbounded+0x198/0x57c mm/readahead.c:248
 do_page_cache_ra mm/readahead.c:300 [inline]
 page_cache_ra_order+0x850/0xa1c mm/readahead.c:564
 ondemand_readahead+0x600/0xb0c mm/readahead.c:690
 page_cache_async_ra+0x1b0/0x1cc mm/readahead.c:739
 do_async_mmap_readahead mm/filemap.c:3191 [inline]
 filemap_fault+0x4c0/0xe8c mm/filemap.c:3245
 __do_fault+0x11c/0x3d8 mm/memory.c:4280
 do_read_fault mm/memory.c:4631 [inline]
 do_fault mm/memory.c:4760 [inline]
 handle_pte_fault mm/memory.c:5031 [inline]
 __handle_mm_fault mm/memory.c:5173 [inline]
 handle_mm_fault+0x1ac0/0x2ff0 mm/memory.c:5294
 faultin_page mm/gup.c:1026 [inline]
 __get_user_pages+0x338/0x798 mm/gup.c:1250
 __get_user_pages_locked mm/gup.c:1454 [inline]
 get_dump_page+0x13c/0x5c4 mm/gup.c:1952
 dump_user_range+0x10c/0x5e8 fs/coredump.c:975
 elf_core_dump+0x27bc/0x2cc4 fs/binfmt_elf.c:2354
 do_coredump+0x10c4/0x1c4c fs/coredump.c:824
 get_signal+0xdec/0x1310 kernel/signal.c:2857
 do_signal arch/arm64/kernel/signal.c:1081 [inline]
 do_notify_resume+0x29c/0x2b28 arch/arm64/kernel/signal.c:1134
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_da+0xb4/0x154 arch/arm64/kernel/entry-common.c:516
 el0t_64_sync_handler+0x90/0xf0 arch/arm64/kernel/entry-common.c:658
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585