BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8314 Comm: syz.8.197 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
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+0xf9c/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 local_lock_acquire+0x3c/0x98 include/linux/local_lock_internal.h:38
 ___slab_alloc+0x1a8/0xf1c mm/slub.c:3773
 __slab_alloc+0x74/0xd0 mm/slub.c:3992
 __slab_alloc_node mm/slub.c:4067 [inline]
 slab_alloc_node mm/slub.c:4228 [inline]
 kmem_cache_alloc_noprof+0x2e0/0x3e8 mm/slub.c:4247
 mempool_alloc_slab+0x58/0x74 mm/mempool.c:587
 mempool_alloc_noprof+0x150/0x3f4 mm/mempool.c:406
 bvec_alloc block/bio.c:210 [inline]
 bio_alloc_bioset+0x30c/0xf9c block/bio.c:570
 btrfs_bio_alloc+0x54/0x13c fs/btrfs/bio.c:69
 alloc_new_bio fs/btrfs/extent_io.c:683 [inline]
 submit_extent_folio+0x650/0xf7c fs/btrfs/extent_io.c:747
 btrfs_do_readpage+0x138c/0x1a54 fs/btrfs/extent_io.c:1068
 btrfs_readahead+0x33c/0x6c4 fs/btrfs/extent_io.c:2619
 read_pages+0x13c/0x4c4 mm/readahead.c:160
 page_cache_ra_unbounded+0x628/0x71c mm/readahead.c:297
 do_page_cache_ra mm/readahead.c:327 [inline]
 page_cache_ra_order+0x930/0xb7c mm/readahead.c:529
 page_cache_sync_ra+0x580/0x73c mm/readahead.c:619
 page_cache_sync_readahead include/linux/pagemap.h:1369 [inline]
 defrag_one_cluster fs/btrfs/defrag.c:1313 [inline]
 btrfs_defrag_file+0x788/0x26d0 fs/btrfs/defrag.c:1455
 btrfs_ioctl_defrag+0x2a0/0x3cc fs/btrfs/ioctl.c:2572
 btrfs_ioctl+0xa30/0xc3c fs/btrfs/ioctl.c:-1
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596