BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 9887 Comm: syz.0.1275 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 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:3777 [inline]
 validate_chain kernel/locking/lockdep.c:3798 [inline]
 __lock_acquire+0x1864/0x6634 kernel/locking/lockdep.c:5063
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154
 update_curr_rt+0x1b8/0x510 kernel/sched/rt.c:1079
 put_prev_task_rt+0x60/0x324 kernel/sched/rt.c:1836
 put_prev_task kernel/sched/sched.h:2220 [inline]
 put_prev_task_balance+0x104/0x134 kernel/sched/core.c:5851
 __pick_next_task kernel/sched/core.c:5886 [inline]
 pick_next_task kernel/sched/core.c:6381 [inline]
 __schedule+0x600/0x1a6c kernel/sched/core.c:6526
 preempt_schedule_irq+0x8c/0x1ac kernel/sched/core.c:6875
 arm64_preempt_schedule_irq+0x44/0x54 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]
 lock_acquire+0x24c/0x638 kernel/locking/lockdep.c:5679
 rcu_lock_acquire+0x44/0x54 include/linux/rcupdate.h:350
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 page_ext_get+0x2c/0x2c4 mm/page_ext.c:157
 __page_table_check_zero+0xf4/0x2b0 mm/page_table_check.c:146
 page_table_check_free include/linux/page_table_check.h:46 [inline]
 free_pages_prepare mm/page_alloc.c:1488 [inline]
 free_pcp_prepare mm/page_alloc.c:1537 [inline]
 free_unref_page_prepare+0xa18/0xb24 mm/page_alloc.c:3414
 free_unref_page+0x7c/0x3a0 mm/page_alloc.c:3509
 free_the_page mm/page_alloc.c:781 [inline]
 __free_pages+0x1a0/0x1cc mm/page_alloc.c:5747
 __free_slab+0x104/0x294 mm/slub.c:2021
 free_slab mm/slub.c:2036 [inline]
 discard_slab+0x58/0xd4 mm/slub.c:2042
 __slab_free+0x1dc/0x260 mm/slub.c:3600
 do_slab_free mm/slub.c:3641 [inline]
 ___cache_free+0x16c/0x19c mm/slub.c:3694
 qlink_free+0x5c/0xa0 mm/kasan/quarantine.c:168
 qlist_free_all+0x3c/0xcc mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x124/0x130 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x2c/0x88 mm/kasan/common.c:306
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x430 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 __kmem_cache_alloc_node+0x278/0x318 mm/slub.c:3398
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc+0xc4/0x180 mm/slab_common.c:949
 kmalloc_array include/linux/slab.h:615 [inline]
 kcalloc include/linux/slab.h:646 [inline]
 iter_file_splice_write+0x130/0xa38 fs/splice.c:624
 do_splice_from fs/splice.c:763 [inline]
 direct_splice_actor+0xe4/0x138 fs/splice.c:950
 splice_direct_to_actor+0x3ec/0x9e4 fs/splice.c:896
 do_splice_direct+0x168/0x25c fs/splice.c:1002
 do_sendfile+0x460/0xc8c fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64 fs/read_write.c:1309 [inline]
 __arm64_sys_sendfile64+0x138/0x374 fs/read_write.c:1309
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 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