DUID 00:04:4b:a6:d8:97:08:21:27:2e:fd:cf:3e:39:f6:c0:7f:1f forked to background, child pid 3213 [ 29.545572][ T3214] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.558968][ T3214] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.174' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 71.647356][ C1] [ 71.649722][ C1] ====================================================== [ 71.656724][ C1] WARNING: possible circular locking dependency detected [ 71.663983][ C1] 6.1.83-syzkaller #0 Not tainted [ 71.668988][ C1] ------------------------------------------------------ [ 71.676007][ C1] ksoftirqd/1/21 is trying to acquire lock: [ 71.681906][ C1] ffff8880b9928118 (krc.lock){..-.}-{2:2}, at: kvfree_call_rcu+0x1b2/0x8c0 [ 71.690733][ C1] [ 71.690733][ C1] but task is already holding lock: [ 71.698090][ C1] ffff888079702a38 (&trie->lock){..-.}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 71.706963][ C1] [ 71.706963][ C1] which lock already depends on the new lock. [ 71.706963][ C1] [ 71.717349][ C1] [ 71.717349][ C1] the existing dependency chain (in reverse order) is: [ 71.726365][ C1] [ 71.726365][ C1] -> #2 (&trie->lock){..-.}-{2:2}: [ 71.733654][ C1] lock_acquire+0x1f8/0x5a0 [ 71.738698][ C1] _raw_spin_lock_irqsave+0xd1/0x120 [ 71.744524][ C1] trie_delete_elem+0x90/0x690 [ 71.749814][ C1] 0xffffffffa0001db6 [ 71.754329][ C1] bpf_trace_run3+0x231/0x440 [ 71.759529][ C1] enqueue_timer+0x440/0x600 [ 71.764631][ C1] __mod_timer+0x92b/0xee0 [ 71.769556][ C1] queue_delayed_work_on+0x156/0x250 [ 71.775433][ C1] toggle_allocation_gate+0x427/0x480 [ 71.781315][ C1] process_one_work+0x8a9/0x11d0 [ 71.786762][ C1] worker_thread+0xa47/0x1200 [ 71.791953][ C1] kthread+0x28d/0x320 [ 71.796531][ C1] ret_from_fork+0x1f/0x30 [ 71.801458][ C1] [ 71.801458][ C1] -> #1 (&base->lock){-.-.}-{2:2}: [ 71.808746][ C1] lock_acquire+0x1f8/0x5a0 [ 71.813782][ C1] _raw_spin_lock_irqsave+0xd1/0x120 [ 71.819616][ C1] lock_timer_base+0x120/0x260 [ 71.824894][ C1] __mod_timer+0x1cb/0xee0 [ 71.829844][ C1] queue_delayed_work_on+0x156/0x250 [ 71.835663][ C1] kvfree_call_rcu+0x520/0x8c0 [ 71.840944][ C1] rtnl_register_internal+0x489/0x580 [ 71.846836][ C1] rtnl_register+0x32/0x70 [ 71.851847][ C1] ip_rt_init+0x335/0x3c7 [ 71.856687][ C1] ip_init+0xa/0x14 [ 71.861019][ C1] inet_init+0x2ae/0x3c0 [ 71.865787][ C1] do_one_initcall+0x265/0x8f0 [ 71.871079][ C1] do_initcall_level+0x157/0x207 [ 71.876537][ C1] do_initcalls+0x49/0x86 [ 71.881378][ C1] kernel_init_freeable+0x45c/0x60f [ 71.887086][ C1] kernel_init+0x19/0x290 [ 71.891922][ C1] ret_from_fork+0x1f/0x30 [ 71.896850][ C1] [ 71.896850][ C1] -> #0 (krc.lock){..-.}-{2:2}: [ 71.903888][ C1] validate_chain+0x1661/0x5950 [ 71.909251][ C1] __lock_acquire+0x125b/0x1f80 [ 71.914609][ C1] lock_acquire+0x1f8/0x5a0 [ 71.919623][ C1] _raw_spin_lock+0x2a/0x40 [ 71.924632][ C1] kvfree_call_rcu+0x1b2/0x8c0 [ 71.929901][ C1] trie_delete_elem+0x520/0x690 [ 71.935260][ C1] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 71.941227][ C1] bpf_trace_run3+0x231/0x440 [ 71.946413][ C1] enqueue_timer+0x440/0x600 [ 71.951517][ C1] __mod_timer+0x92b/0xee0 [ 71.956529][ C1] queue_delayed_work_on+0x156/0x250 [ 71.962325][ C1] srcu_gp_start_if_needed+0xce5/0x1080 [ 71.968378][ C1] rcu_core+0xad4/0x17e0 [ 71.973130][ C1] __do_softirq+0x2e9/0xa4c [ 71.978148][ C1] run_ksoftirqd+0xc1/0x120 [ 71.983158][ C1] smpboot_thread_fn+0x52c/0xa30 [ 71.988613][ C1] kthread+0x28d/0x320 [ 71.993210][ C1] ret_from_fork+0x1f/0x30 [ 71.998249][ C1] [ 71.998249][ C1] other info that might help us debug this: [ 71.998249][ C1] [ 72.008467][ C1] Chain exists of: [ 72.008467][ C1] krc.lock --> &base->lock --> &trie->lock [ 72.008467][ C1] [ 72.020186][ C1] Possible unsafe locking scenario: [ 72.020186][ C1] [ 72.027619][ C1] CPU0 CPU1 [ 72.032984][ C1] ---- ---- [ 72.038330][ C1] lock(&trie->lock); [ 72.042383][ C1] lock(&base->lock); [ 72.048965][ C1] lock(&trie->lock); [ 72.055539][ C1] lock(krc.lock); [ 72.059333][ C1] [ 72.059333][ C1] *** DEADLOCK *** [ 72.059333][ C1] [ 72.067460][ C1] 6 locks held by ksoftirqd/1/21: [ 72.072464][ C1] #0: ffffffff8d12aa00 (rcu_callback){....}-{0:0}, at: rcu_core+0xa64/0x17e0 [ 72.081417][ C1] #1: ffffffff8d171228 (tracepoint_srcu){....}-{0:0}, at: srcu_gp_start_if_needed+0x17f/0x1080 [ 72.091863][ C1] #2: ffffffff8d170f68 (tracepoint_srcu.lock){....}-{2:2}, at: spin_lock_irqsave_ssp_contention+0x106/0x440 [ 72.103443][ C1] #3: ffff8880b9928358 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x62d/0xee0 [ 72.112415][ C1] #4: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run3+0x146/0x440 [ 72.121814][ C1] #5: ffff888079702a38 (&trie->lock){..-.}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 72.131117][ C1] [ 72.131117][ C1] stack backtrace: [ 72.137001][ C1] CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.1.83-syzkaller #0 [ 72.144898][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 72.154947][ C1] Call Trace: [ 72.158216][ C1] [ 72.161140][ C1] dump_stack_lvl+0x1e3/0x2cb [ 72.165812][ C1] ? nf_tcp_handle_invalid+0x642/0x642 [ 72.171265][ C1] ? print_circular_bug+0x12b/0x1a0 [ 72.176452][ C1] check_noncircular+0x2fa/0x3b0 [ 72.181385][ C1] ? deref_stack_reg+0x17c/0x210 [ 72.186317][ C1] ? add_chain_block+0x850/0x850 [ 72.191252][ C1] ? lockdep_lock+0x11f/0x2a0 [ 72.195922][ C1] ? unwind_next_frame+0x111a/0x2220 [ 72.201196][ C1] ? _find_first_zero_bit+0xd0/0x100 [ 72.206473][ C1] validate_chain+0x1661/0x5950 [ 72.211316][ C1] ? print_irq_lock_scenario+0x180/0x180 [ 72.217006][ C1] ? reacquire_held_locks+0x660/0x660 [ 72.222461][ C1] ? lockdep_lock+0x11f/0x2a0 [ 72.227129][ C1] ? lockdep_unlock+0x165/0x300 [ 72.231968][ C1] ? lockdep_lock+0x2a0/0x2a0 [ 72.236639][ C1] ? mark_lock+0x9a/0x340 [ 72.241009][ C1] __lock_acquire+0x125b/0x1f80 [ 72.245894][ C1] lock_acquire+0x1f8/0x5a0 [ 72.250418][ C1] ? kvfree_call_rcu+0x1b2/0x8c0 [ 72.255362][ C1] ? read_lock_is_recursive+0x10/0x10 [ 72.260738][ C1] ? do_raw_spin_unlock+0x137/0x8a0 [ 72.265949][ C1] ? __virt_addr_valid+0x17f/0x520 [ 72.271053][ C1] ? __virt_addr_valid+0x17f/0x520 [ 72.276151][ C1] ? __virt_addr_valid+0x44a/0x520 [ 72.281252][ C1] ? __phys_addr+0xb6/0x170 [ 72.285746][ C1] _raw_spin_lock+0x2a/0x40 [ 72.290239][ C1] ? kvfree_call_rcu+0x1b2/0x8c0 [ 72.295158][ C1] kvfree_call_rcu+0x1b2/0x8c0 [ 72.299912][ C1] ? rcu_leak_callback+0x10/0x10 [ 72.304832][ C1] ? _raw_spin_lock_irqsave+0xdd/0x120 [ 72.310284][ C1] ? _raw_spin_lock+0x40/0x40 [ 72.314970][ C1] ? longest_prefix_match+0x318/0x640 [ 72.320335][ C1] trie_delete_elem+0x520/0x690 [ 72.325178][ C1] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 72.330624][ C1] bpf_trace_run3+0x231/0x440 [ 72.335292][ C1] ? bpf_trace_run3+0x146/0x440 [ 72.340128][ C1] ? bpf_trace_run2+0x410/0x410 [ 72.344971][ C1] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 72.350852][ C1] ? do_raw_spin_lock+0x14a/0x370 [ 72.355862][ C1] enqueue_timer+0x440/0x600 [ 72.360446][ C1] __mod_timer+0x92b/0xee0 [ 72.364855][ C1] ? mod_timer_pending+0x20/0x20 [ 72.369784][ C1] ? srcu_gp_start+0x1ba/0x330 [ 72.374539][ C1] ? __queue_delayed_work+0x16b/0x210 [ 72.379898][ C1] queue_delayed_work_on+0x156/0x250 [ 72.385169][ C1] ? delayed_work_timer_fn+0x80/0x80 [ 72.390627][ C1] ? _raw_spin_unlock+0x24/0x40 [ 72.395465][ C1] ? srcu_gp_start+0x1ba/0x330 [ 72.400217][ C1] srcu_gp_start_if_needed+0xce5/0x1080 [ 72.405757][ C1] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 72.411642][ C1] ? srcu_gp_start_if_needed+0x17f/0x1080 [ 72.417351][ C1] ? start_poll_synchronize_srcu+0x10/0x10 [ 72.423145][ C1] ? syscall_unregfunc+0x190/0x190 [ 72.428247][ C1] ? syscall_unregfunc+0x190/0x190 [ 72.433346][ C1] ? rcu_free_old_probes+0x20/0x20 [ 72.438443][ C1] ? call_srcu+0x44/0xd0 [ 72.442683][ C1] ? syscall_unregfunc+0x190/0x190 [ 72.447788][ C1] rcu_core+0xad4/0x17e0 [ 72.452022][ C1] ? rcu_core+0xa64/0x17e0 [ 72.456428][ C1] ? rcu_cpu_kthread_park+0x90/0x90 [ 72.461619][ C1] ? rcu_qs+0xed/0x190 [ 72.465682][ C1] ? rcu_softirq_qs+0x2f0/0x2f0 [ 72.470524][ C1] ? kvm_sched_clock_read+0x14/0x40 [ 72.475711][ C1] ? sched_clock_cpu+0x71/0x2b0 [ 72.480725][ C1] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 72.486693][ C1] ? print_irqtrace_events+0x210/0x210 [ 72.492143][ C1] __do_softirq+0x2e9/0xa4c [ 72.496640][ C1] ? run_ksoftirqd+0xc1/0x120 [ 72.501304][ C1] ? __entry_text_end+0x1feabe/0x1feabe [ 72.506840][ C1] ? run_ksoftirqd+0xa3/0x120 [ 72.511506][ C1] run_ksoftirqd+0xc1/0x120 [ 72.515997][ C1] ? ksoftirqd_should_run+0x20/0x20 [ 72.521181][ C1] ? ksoftirqd_should_run+0x20/0x20 [ 72.526364][ C1] smpboot_thread_fn+0x52c/0xa30 [ 72.531293][ C1] ? smpboot_thread_fn+0x4a/0xa30 [ 72.536310][ C1] kthread+0x28d/0x320 [ 72.540373][ C1] ? cpu_report_death+0x2b0/0x2b0 [ 72.545648][ C1] ? kthread_blkcg+0xd0/0xd0 [ 72.550231][ C1] ret_from_fork+0x1f/0x30 [ 72.554645][ C1]