BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 11393 Comm: syz.9.1389 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xfdc/0x2ebc kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:166
 debug_object_activate+0x94/0x23c lib/debugobjects.c:845
 debug_timer_activate kernel/time/timer.c:793 [inline]
 __mod_timer+0x524/0x8a8 kernel/time/timer.c:1124
 mod_timer+0x2c/0x3c kernel/time/timer.c:1195
 blk_stat_activate_nsecs block/blk-stat.h:151 [inline]
 rwb_arm_timer+0x118/0x138 block/blk-wbt.c:422
 wbt_wait+0x214/0x2c0 block/blk-wbt.c:661
 __rq_qos_throttle+0x6c/0xb4 block/blk-rq-qos.c:66
 rq_qos_throttle block/blk-rq-qos.h:164 [inline]
 blk_mq_get_new_requests block/blk-mq.c:3063 [inline]
 blk_mq_submit_bio+0x126c/0x2544 block/blk-mq.c:3202
 __submit_bio+0x1a0/0x480 block/blk-core.c:635
 __submit_bio_noacct_mq block/blk-core.c:722 [inline]
 submit_bio_noacct_nocheck+0x288/0xaac block/blk-core.c:753
 submit_bio_noacct+0xd7c/0x17f0 block/blk-core.c:884
 submit_bio+0x38c/0x528 block/blk-core.c:926
 blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]
 submit_bh_wbc+0x4c8/0x5ac fs/buffer.c:2737
 __block_write_full_folio+0x71c/0xbec fs/buffer.c:1830
 block_write_full_folio+0x2a0/0x348 include/linux/highmem.h:-1
 blkdev_writepages+0xec/0x184 block/fops.c:486
 do_writepages+0x284/0x47c mm/page-writeback.c:2571
 filemap_writeback+0x230/0x2bc mm/filemap.c:388
 filemap_fdatawrite_range mm/filemap.c:413 [inline]
 filemap_write_and_wait_range+0x90/0x114 mm/filemap.c:685
 filemap_write_and_wait include/linux/pagemap.h:65 [inline]
 sync_blockdev+0x50/0x6c block/bdev.c:276
 bdev_disk_changed+0x1a8/0x11ec block/partitions/core.c:658
 blkdev_get_whole+0x15c/0x240 block/bdev.c:756
 bdev_open+0x2b4/0x880 block/bdev.c:965
 bdev_file_open_by_dev+0x180/0x1d8 block/bdev.c:1067
 disk_scan_partitions+0x1b4/0x2d4 block/genhd.c:387
 blkdev_common_ioctl+0x10f8/0x1fe0 block/ioctl.c:712
 blkdev_ioctl+0x4ec/0x904 block/ioctl.c:791
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594