device bridge94 entered promiscuous mode device bridge116 entered promiscuous mode INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 1, t=10502 jiffies, g=17687, c=17686, q=391) All QSes seen, last rcu_preempt kthread activity 10497 (4295001944-4294991447), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.1 R running task 29280 23706 6344 0x00000008 Call Trace: sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline] check_cpu_stall kernel/rcu/tree.c:1616 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:set_track mm/kasan/kasan.c:459 [inline] RIP: 0010:kasan_kmalloc mm/kasan/kasan.c:551 [inline] RIP: 0010:kasan_kmalloc+0xa2/0xe0 mm/kasan/kasan.c:529 RSP: 0000:ffff8880aeb07620 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: ffffed10114aa110 RBX: ffff88808a550880 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000400 RDI: ffffed10114aa110 RBP: ffff88808a550480 R08: 0000000000000000 R09: ffffed10114aa110 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000001090220 R13: 0000000000000000 R14: ffff88812fe54ac0 R15: ffff88808a55087f slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc_node mm/slab.c:3333 [inline] kmem_cache_alloc_node_trace+0x144/0x7b0 mm/slab.c:3659 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] sctp_packet_transmit+0x30c/0x2d70 net/sctp/output.c:580 sctp_outq_flush+0xc54/0x2dd0 net/sctp/outqueue.c:1187 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline] sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150 sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611 RSP: 0000:ffff88820cc47e20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2cd3 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888052c00d44 RBP: ffffed100a580098 R08: 0000007fb2f67c32 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888052c004c0 R13: ffffffff87d16698 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:exit_to_usermode_loop+0x6c/0x220 arch/x86/entry/common.c:152 RSP: 0000:ffff88820cc47ef8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff09 RAX: 0000000000040000 RBX: 0000000000000008 RCX: ffffc9000611b000 RDX: 000000000001606b RSI: ffffffff81006125 RDI: ffff888052c00d44 RBP: dffffc0000000000 R08: 0000007fb2f667ac R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffed100a580098 R13: ffff88820cc47f58 R14: ffff888052c004c0 R15: ffffffff87d16698 prepare_exit_to_usermode+0x1af/0x210 arch/x86/entry/common.c:199 retint_user+0x8/0x18 RIP: 0033:0x45c829 RSP: 002b:00007fc0c4c3dcf8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: 000000000078c0e8 RCX: 000000000045c829 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000078c0ec RBP: 000000000078c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078c0ec R13: 00007fffaa7cdabf R14: 00007fc0c4c3e9c0 R15: 000000000078c0ec rcu_preempt kthread starved for 10545 jiffies! g17687 c17686 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29920 8 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404