Interruptibility = 00000008 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff812048fe RSP = 0xffff8881b35bf390 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f3537b68700 GSBase=ffff8881dad00000 TRBase=fffffe0000003000 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=206729, q=180) rcu: All QSes seen, last rcu_preempt kthread activity 10492 (4295085283-4295074791), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor3 R running task 22656 2487 24918 0x00000000 Call Trace: sched_show_task.cold.84+0x2b6/0x30a kernel/sched/core.c:5293 print_other_cpu_stall.cold.69+0x80e/0x8db kernel/rcu/tree.c:1301 check_cpu_stall kernel/rcu/tree.c:1429 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xfd7/0x13f0 kernel/rcu/tree.c:2521 update_process_times+0x2d/0x70 kernel/time/timer.c:1635 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:161 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xaf/0xd0 kernel/locking/spinlock.c:184 Code: b0 40 72 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 28 48 83 3d 38 f5 8e 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb ad e8 8c 31 1d f9 eb bb 0f 0b 0f 0b e8 aa ab e0 RSP: 0018:ffff888180e1f528 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 1ffff110399721d4 RDX: 1ffffffff12e4816 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff888180e1f538 R08: ffff8881ccb90ea0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881ccb90600 R12: ffff8881d21472a0 R13: ffff888180e1f660 R14: 0000000000000000 R15: 0000000000000282 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline] __skb_try_recv_datagram+0x236/0x5b0 net/core/datagram.c:272 unix_dgram_recvmsg+0x2e4/0x1b10 net/unix/af_unix.c:2105 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:802 __sys_recvfrom+0x311/0x5d0 net/socket.c:1846 __do_sys_recvfrom net/socket.c:1864 [inline] __se_sys_recvfrom net/socket.c:1860 [inline] __x64_sys_recvfrom+0xe1/0x1a0 net/socket.c:1860 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457659 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd89fa0cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002d RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457659 RDX: 0000000000000044 RSI: 0000000020003540 RDI: 0000000000000009 RBP: 000000000072bf00 R08: 0000000020003640 R09: 00000000007071c9 R10: 0000000000010062 R11: 0000000000000246 R12: 00007fd89fa0d6d4 R13: 00000000004c3a2a R14: 00000000004d5e00 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10492 jiffies! g206729 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 22464 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0xa41/0x21e0 kernel/sched/core.c:3472 schedule+0xef/0x370 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1803 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1948 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2105 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001cb4a9000 CR4=00000000001426e0 Sysenter RSP=fffffe0000032200 CS:RIP=0010:ffffffff88001360 EFER = 0x0000000000000d01 PAT = 0x0407050600070106 *** Control State *** PinBased=0000003f CPUBased=b5986dfa SecondaryExec=000000ca EntryControls=0000d1ff ExitControls=002fefff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=80000306 errcode=00000000 ilen=00000003 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xfffffd1db0dde2e9 EPT pointer = 0x00000001b7cb301e device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves