BTRFS info (device loop5): using free space tree
BTRFS info (device loop5): enabling ssd optimizations
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 10578 Comm: syz.5.2321 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 dump_backtrace+0x1c0/0x1ec 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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 fs_reclaim_acquire+0xc4/0x124 mm/page_alloc.c:4765
 might_alloc include/linux/sched/mm.h:271 [inline]
 slab_pre_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3279 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x60/0x308 mm/slub.c:3383
 kmem_cache_zalloc include/linux/slab.h:689 [inline]
 btrfs_alloc_path+0x58/0x64 fs/btrfs/ctree.c:83
 btrfs_setxattr+0xd8/0x6fc fs/btrfs/xattr.c:94
 btrfs_setxattr_trans+0xfc/0x2e8 fs/btrfs/xattr.c:258
 __btrfs_set_acl+0x13c/0x2c0 fs/btrfs/acl.c:102
 btrfs_set_acl+0x104/0x1b8 fs/btrfs/acl.c:125
 set_posix_acl fs/posix_acl.c:1160 [inline]
 posix_acl_xattr_set+0x2f8/0x394 fs/posix_acl.c:1189
 __vfs_removexattr+0x36c/0x388 fs/xattr.c:479
 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:514
 vfs_removexattr+0x80/0x190 fs/xattr.c:536
 ovl_do_removexattr fs/overlayfs/overlayfs.h:270 [inline]
 ovl_workdir_create+0x348/0x658 fs/overlayfs/super.c:821
 ovl_make_workdir fs/overlayfs/super.c:1389 [inline]
 ovl_get_workdir+0x318/0x10bc fs/overlayfs/super.c:1539
 ovl_fill_super+0x1390/0x2240 fs/overlayfs/super.c:2095
 mount_nodev+0x68/0x104 fs/super.c:1489
 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3078
 path_mount+0x5bc/0xe80 fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 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