loop5: detected capacity change from 0 to 512
EXT4-fs (loop5): mounted filesystem without journal. Opts: i_version,quota,min_batch_time=0x0000000000000005,,errors=continue. Quota mode: writeback.
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 10808 Comm: syz.5.1714 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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
 update_curr_rt+0x324/0x758 kernel/sched/rt.c:1041
 put_prev_task_rt+0x30/0x2c4 kernel/sched/rt.c:1674
 put_prev_task kernel/sched/sched.h:2190 [inline]
 put_prev_task_balance+0x104/0x134 kernel/sched/core.c:5629
 __pick_next_task kernel/sched/core.c:5664 [inline]
 pick_next_task kernel/sched/core.c:6192 [inline]
 __schedule+0x6ac/0x1c0c kernel/sched/core.c:6340
 preempt_schedule_irq+0x90/0x214 kernel/sched/core.c:6780
 arm64_preempt_schedule_irq+0x14c/0x21c arch/arm64/kernel/entry-common.c:260
 el1_interrupt+0x40/0x58 arch/arm64/kernel/entry-common.c:463
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522
 rcu_lock_release+0x1c/0x30 include/linux/rcupdate.h:317
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline]
 percpu_ref_tryget+0x150/0x230 include/linux/percpu-refcount.h:266
 css_tryget include/linux/cgroup.h:355 [inline]
 get_mem_cgroup_from_mm+0xfc/0x33c mm/memcontrol.c:991
 __mem_cgroup_charge+0x24/0xb0 mm/memcontrol.c:6800
 mem_cgroup_charge include/linux/memcontrol.h:700 [inline]
 __add_to_page_cache_locked+0x7b4/0xc58 mm/filemap.c:892
 add_to_page_cache_lru+0x13c/0x430 mm/filemap.c:984
 pagecache_get_page+0xa4c/0xcb4 mm/filemap.c:1951
 grab_cache_page_write_begin+0x68/0xb8 mm/filemap.c:3739
 ext4_write_begin+0x27c/0xdbc fs/ext4/inode.c:1197
 ext4_da_write_begin+0x380/0x83c fs/ext4/inode.c:2975
 generic_perform_write+0x204/0x480 mm/filemap.c:3785
 ext4_buffered_write_iter+0x408/0x538 fs/ext4/file.c:268
 ext4_file_write_iter+0x698/0x14cc include/linux/fs.h:-1
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x7c8/0xa2c fs/read_write.c:594
 ksys_write+0x120/0x210 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:656
 __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