INFO: task kworker/u10:3:766 blocked for more than 430 seconds. Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u10:3 state:D stack:0 pid:766 tgid:766 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events_unbound bpf_map_free_deferred Call Trace: [] context_switch kernel/sched/core.c:5396 [inline] [] __schedule+0x1022/0x4094 kernel/sched/core.c:6785 [] __schedule_loop kernel/sched/core.c:6863 [inline] [] schedule+0xc4/0x35e kernel/sched/core.c:6878 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6935 [] __mutex_lock_common kernel/locking/mutex.c:679 [inline] [] __mutex_lock+0x9be/0x1292 kernel/locking/mutex.c:747 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:799 [] rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782 [] dev_map_free+0x11c/0x6bc kernel/bpf/devmap.c:214 [] bpf_map_free kernel/bpf/syscall.c:862 [inline] [] bpf_map_free_deferred+0x226/0x47a kernel/bpf/syscall.c:888 [] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3238 [] process_scheduled_works kernel/workqueue.c:3321 [inline] [] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3402 [] kthread+0x39c/0x7d4 kernel/kthread.c:464 [] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214 [] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327 Showing all locks held in the system: 2 locks held by kworker/0:1/10: 1 lock held by kworker/R-mm_pe/14: #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531 2 locks held by kworker/u10:1/36: #0: ffffaf806ed5d0d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline] #0: ffffaf806ed5d0d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1532 [inline] #0: ffffaf806ed5d0d8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1856 [inline] #0: ffffaf806ed5d0d8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x304/0x4094 kernel/sched/core.c:6709 #1: ffffaf806ed47688 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x22a/0x718 kernel/sched/psi.c:987 1 lock held by khungtaskd/37: #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766 3 locks held by kworker/u10:3/766: #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213 #1: ffff8f8002527b70 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213 #2: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782 2 locks held by kworker/0:2/925: 2 locks held by getty/3134: #0: ffffaf801ceae0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ffff8f800008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12b6 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/3164: 1 lock held by kworker/R-wg-cr/3348: #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531 1 lock held by kworker/R-wg-cr/3351: #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531 3 locks held by kworker/R-wg-cr/3354: #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline] #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: raw_spin_rq_lock kernel/sched/sched.h:1532 [inline] #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: rq_lock kernel/sched/sched.h:1856 [inline] #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: __schedule+0x304/0x4094 kernel/sched/core.c:6709 #1: ffffffff90f63960 (&obj_hash[i].lock){-.-.}-{2:2}, at: psi_task_switch+0x22a/0x718 kernel/sched/psi.c:987 #2: ffffffff90fe0d90 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x130/0x33e lib/debugobjects.c:818 1 lock held by kworker/R-wg-cr/3384: #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531 4 locks held by kworker/R-wg-cr/3401: 1 lock held by kworker/R-wg-cr/3405: #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531 2 locks held by kworker/0:0/3765: 1 lock held by kworker/0:3/3816: #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678 2 locks held by kworker/0:4/4539: 3 locks held by kworker/u10:4/4793: 2 locks held by kworker/0:5/4879: 2 locks held by kworker/0:6/4886: 2 locks held by kworker/0:7/4887: 2 locks held by kworker/0:8/4894: 2 locks held by kworker/0:9/4911: 2 locks held by syz.0.430/4913: #0: ffffffff88ff1700 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0xea/0x31c net/core/rtnetlink.c:573 #1: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782 4 locks held by syz-executor/4938: 2 locks held by kworker/0:10/4970: 1 lock held by kworker/R-wg-cr/5054: 2 locks held by kworker/R-wg-cr/5057: #0: ffffaf806ed3b0d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline] #0: ffffaf806ed3b0d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1532 [inline] #0: ffffaf806ed3b0d8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1856 [inline] #0: ffffaf806ed3b0d8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x304/0x4094 kernel/sched/core.c:6709 #1: ffffaf806ed25688 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x22a/0x718 kernel/sched/psi.c:987 2 locks held by kworker/R-wg-cr/5060: 2 locks held by kworker/0:11/5095: 2 locks held by kworker/0:12/5186: 2 locks held by kworker/1:3/5306: 2 locks held by kworker/0:13/5339: 1 lock held by syz.1.466/5344: #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782 2 locks held by modprobe/5448: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120 [] dump_stack+0x1c/0x24 lib/dump_stack.c:129 [] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113 [] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62 [] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350 [] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline] [] watchdog+0xcf2/0x11de kernel/hung_task.c:470 [] kthread+0x39c/0x7d4 kernel/kthread.c:464 [] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214 [] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker epc : preempt_count include/asm-generic/preempt.h:11 [inline] epc : should_resched include/asm-generic/preempt.h:77 [inline] epc : __local_bh_enable_ip+0x38e/0x5e8 kernel/softirq.c:414 ra : __local_bh_enable_ip+0x38a/0x5e8 kernel/softirq.c:412 epc : ffffffff80160e9a ra : ffffffff80160e96 sp : ffff8f8000006b10 gp : ffffffff89c7e9c0 tp : ffffaf8012ad9a40 t0 : ffff8f80000069d0 t1 : 0000000000000130 t2 : fffffffff2f20000 s0 : ffff8f8000006b60 s1 : 0000000000000102 a0 : 0000000000000000 a1 : ffffffff87d6da40 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001 a5 : 000000000021d0d6 a6 : 0000000000f00000 a7 : 0000000000000000 s2 : ffffaf8012ad9a40 s3 : ffffffff859e9a76 s4 : 0000000000000001 s5 : ffffffff910373c0 s6 : 1ffff5f00255b349 s7 : ffffffff89cbf9c0 s8 : ffff8f8000006da0 s9 : dfffffff00000000 s10: ffff8f8000006d40 s11: ffffaf803b382800 t3 : 1ffff5f006adc403 t4 : ffffaf801ff30128 t5 : ffffffff876a8388 t6 : 0000000000000002 status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001 [] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline] [] __local_bh_enable_ip+0x38e/0x5e8 kernel/softirq.c:412 [] local_bh_enable include/linux/bottom_half.h:33 [inline] [] ipt_do_table+0xe88/0x1c82 net/ipv4/netfilter/ip_tables.c:357 [] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] [] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623 [] nf_hook include/linux/netfilter.h:272 [inline] [] __ip_local_out+0x498/0xbb2 net/ipv4/ip_output.c:118 [] ip_local_out+0x2e/0x1a8 net/ipv4/ip_output.c:127 [] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439 [] synproxy_send_client_synack+0x6dc/0x8be net/netfilter/nf_synproxy_core.c:484 [] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline] [] nft_synproxy_do_eval+0x8ac/0xa52 net/netfilter/nft_synproxy.c:141 [] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247 [] expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] [] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:285 [] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161 [] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] [] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623 [] nf_hook include/linux/netfilter.h:272 [inline] [] NF_HOOK include/linux/netfilter.h:315 [inline] [] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254 [] dst_input include/net/dst.h:469 [inline] [] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:447 [] NF_HOOK include/linux/netfilter.h:317 [inline] [] NF_HOOK include/linux/netfilter.h:311 [inline] [] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:567 [] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977 [] __netif_receive_skb+0x2c/0x144 net/core/dev.c:6090 [] process_backlog+0x4f6/0x1cb0 net/core/dev.c:6442 [] __napi_poll.constprop.0+0xaa/0x4ba net/core/dev.c:7414 [] napi_poll net/core/dev.c:7478 [inline] [] net_rx_action+0xad4/0xefc net/core/dev.c:7605 [] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579 [] __do_softirq+0x12/0x1a kernel/softirq.c:613 [] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85 [] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360