BUG: MAX_STACK_TRACE_ENTRIES too low! turning off the locking correctness validator. CPU: 2 UID: 0 PID: 597 Comm: kworker/2:9 Not tainted 6.13.0-rc1-syzkaller-00001-ge70140ba0d2b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: events bpf_prog_free_deferred Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 save_trace+0x78f/0xb60 kernel/locking/lockdep.c:579 check_prev_add kernel/locking/lockdep.c:3222 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x312a/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 htab_lock_bucket kernel/bpf/hashtab.c:167 [inline] htab_map_delete_elem+0x1c8/0x740 kernel/bpf/hashtab.c:1448 bpf_prog_57115342e4867123+0x48/0x4c bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2351 [inline] bpf_trace_run2+0x231/0x590 kernel/trace/bpf_trace.c:2392 __traceiter_kfree+0x2d/0x50 include/trace/events/kmem.h:94 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x258/0x4b0 mm/slub.c:4733 bpf_free_used_maps kernel/bpf/core.c:2757 [inline] bpf_prog_free_deferred+0x12e/0x6f0 kernel/bpf/core.c:2794 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244