BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 9163 Comm: syz.8.827 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1810/0x6610 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5662
 _raw_spin_lock_nested+0x5c/0x78 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:538 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1362 [inline]
 rq_lock kernel/sched/sched.h:1652 [inline]
 ttwu_queue kernel/sched/core.c:3903 [inline]
 try_to_wake_up+0x3f0/0xcb4 kernel/sched/core.c:4228
 wake_up_process kernel/sched/core.c:4362 [inline]
 wake_up_q+0x98/0x108 kernel/sched/core.c:1010
 __mutex_unlock_slowpath+0x584/0x5e4 kernel/locking/mutex.c:951
 mutex_unlock+0x24/0x30 kernel/locking/mutex.c:543
 apply_workqueue_attrs kernel/workqueue.c:4118 [inline]
 alloc_and_link_pwqs kernel/workqueue.c:4241 [inline]
 alloc_workqueue+0x9a0/0xeec kernel/workqueue.c:4349
 loop_configure+0x538/0xf28 drivers/block/loop.c:1054
 lo_ioctl+0x19c/0x1aec drivers/block/loop.c:1546
 blkdev_ioctl+0x654/0xb74 block/ioctl.c:626
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __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
loop8: detected capacity change from 0 to 8192
REISERFS warning:  read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025
REISERFS (device loop8): found reiserfs format "3.6" with non-standard journal
REISERFS (device loop8): using ordered data mode
reiserfs: using flush barriers
REISERFS (device loop8): journal params: device loop8, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop8): checking transaction log (loop8)
REISERFS (device loop8): Using tea hash to sort names
REISERFS (device loop8): Created .reiserfs_priv - reserved for xattr storage.