[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 43.864742][ T25] audit: type=1800 audit(1575362057.751:25): pid=8108 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 43.884104][ T25] audit: type=1800 audit(1575362057.761:26): pid=8108 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.926842][ T25] audit: type=1800 audit(1575362057.761:27): pid=8108 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. 2019/12/03 08:34:28 fuzzer started 2019/12/03 08:34:30 dialing manager at 10.128.0.26:38907 2019/12/03 08:34:30 syscalls: 2697 2019/12/03 08:34:30 code coverage: enabled 2019/12/03 08:34:30 comparison tracing: enabled 2019/12/03 08:34:30 extra coverage: extra coverage is not supported by the kernel 2019/12/03 08:34:30 setuid sandbox: enabled 2019/12/03 08:34:30 namespace sandbox: enabled 2019/12/03 08:34:30 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 08:34:30 fault injection: enabled 2019/12/03 08:34:30 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 08:34:30 net packet injection: enabled 2019/12/03 08:34:30 net device setup: enabled 2019/12/03 08:34:30 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 08:34:30 devlink PCI setup: PCI device 0000:00:10.0 is not available 08:34:31 executing program 0: capset(&(0x7f0000000000)={0x20080522}, &(0x7f0000000040)) r0 = socket$inet6_udplite(0xa, 0x2, 0x88) getsockopt$IP6T_SO_GET_INFO(r0, 0x29, 0x40, 0x0, &(0x7f0000000100)) 08:34:31 executing program 1: syz_open_dev$dmmidi(0x0, 0x0, 0x110002) r0 = getpid() perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x1f, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext={0x1000000000, 0x6}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) bpf$BPF_TASK_FD_QUERY(0x14, 0x0, 0x0) bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000200)={r0, 0xffffffffffffffff, 0x0, 0x12, &(0x7f00000001c0)='/dev/input/mouse#\x00'}, 0x30) r1 = getpid() sched_setscheduler(r1, 0x5, &(0x7f0000000380)) perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x41c1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) socket$inet_tcp(0x2, 0x1, 0x0) setsockopt$sock_int(0xffffffffffffffff, 0x1, 0x0, 0x0, 0x0) r2 = openat$autofs(0xffffffffffffff9c, &(0x7f0000000040)='/dev/autofs\x00', 0x800, 0x0) r3 = openat$rdma_cm(0xffffffffffffff9c, &(0x7f0000000140)='/dev/infiniband/rdma_cm\x00', 0x2, 0x0) write$RDMA_USER_CM_CMD_CREATE_ID(r3, &(0x7f0000000280)={0x0, 0x18, 0xfa00, {0x0, &(0x7f0000000000)={0xffffffffffffffff}, 0x13f}}, 0x20) write$RDMA_USER_CM_CMD_RESOLVE_IP(r3, &(0x7f0000000400)={0x3, 0x40, 0xfa00, {{0xa, 0x0, 0x0, @dev}, {0xa, 0x0, 0x0, @ipv4={[], [], @multicast1}}, r4}}, 0x48) write$RDMA_USER_CM_CMD_RESOLVE_IP(r3, &(0x7f00000000c0)={0x3, 0x40, 0xfa00, {{0x2, 0x0, 0x0, @rand_addr="04d80adce20f9259329568b6080100ec"}, {0x2, 0x0, 0xfffffffffffffffd, @local={0xfe, 0x80, [0x0, 0x0, 0x0, 0x0, 0x0, 0xf000000, 0xfd000000, 0x0, 0x4]}}, r4}}, 0x48) ioctl$SNDCTL_DSP_SETDUPLEX(r2, 0x5016, 0x0) write$RDMA_USER_CM_CMD_ACCEPT(0xffffffffffffffff, 0x0, 0x0) ioctl$PPPIOCCONNECT(0xffffffffffffffff, 0x4004743a, 0x0) syzkaller login: [ 57.892934][ T8271] IPVS: ftp: loaded support on port[0] = 21 08:34:31 executing program 2: r0 = socket$inet(0x2, 0x4000000000000001, 0x0) ioctl$sock_inet_SIOCADDRT(r0, 0x890b, &(0x7f0000000100)={0x0, {}, {0x2, 0x0, @dev}, {0x2, 0x0, @initdev={0xac, 0x1e, 0x0, 0x0}}, 0x18f}) [ 58.051261][ T8273] IPVS: ftp: loaded support on port[0] = 21 [ 58.062545][ T8271] chnl_net:caif_netlink_parms(): no params data found [ 58.146597][ T8271] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.167170][ T8271] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.186952][ T8271] device bridge_slave_0 entered promiscuous mode [ 58.216489][ T8271] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.224799][ T8271] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.248963][ T8271] device bridge_slave_1 entered promiscuous mode [ 58.265771][ T8276] IPVS: ftp: loaded support on port[0] = 21 08:34:32 executing program 3: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000013c0)='/dev/ptmx\x00', 0x1, 0x0) ioctl$TCSETS(r0, 0x40045431, &(0x7f0000000080)) r1 = syz_open_pts(r0, 0x0) ioctl$TIOCSETD(r1, 0x5423, &(0x7f00000000c0)=0x3) r2 = fcntl$dupfd(r0, 0x0, r1) write$P9_RSYMLINK(r2, &(0x7f0000000180)={0x14}, 0x10000015a) r3 = socket$inet6_tcp(0xa, 0x1, 0x0) r4 = dup2(r3, r3) ioctl$PERF_EVENT_IOC_ENABLE(r4, 0x8912, 0x400200) r5 = socket$inet_icmp_raw(0x2, 0x3, 0x1) mmap(&(0x7f0000106000/0x3000)=nil, 0x3000, 0x0, 0x11, r5, 0x0) [ 58.300511][ T8271] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.335962][ T8271] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.401825][ T8273] chnl_net:caif_netlink_parms(): no params data found [ 58.417318][ T8271] team0: Port device team_slave_0 added [ 58.428204][ T8271] team0: Port device team_slave_1 added 08:34:32 executing program 4: r0 = openat$snapshot(0xffffffffffffff9c, &(0x7f0000000100)='/dev/snapshot\x00', 0x0, 0x0) ioctl$VHOST_SET_VRING_KICK(r0, 0x3310, 0x0) [ 58.679524][ T8271] device hsr_slave_0 entered promiscuous mode [ 58.748873][ T8271] device hsr_slave_1 entered promiscuous mode 08:34:32 executing program 5: r0 = socket$kcm(0x2b, 0x1, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r0, 0x8912, 0x400200) bpf$PROG_LOAD(0x5, &(0x7f000000e000)={0x3, 0x4, &(0x7f0000000040)=@framed={{0xffffffb4, 0x5, 0x0, 0x0, 0x0, 0x61, 0x10, 0x8c}, [@ldst={0x3, 0x0, 0x3, 0x1c10a1, 0x0, 0x48}]}, &(0x7f0000003ff6)='G\x00', 0x5, 0xfd90, &(0x7f000000cf3d)=""/195, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x0, 0x10, &(0x7f0000000000), 0xf7}, 0x48) [ 58.813516][ T8280] IPVS: ftp: loaded support on port[0] = 21 [ 58.853245][ T8282] IPVS: ftp: loaded support on port[0] = 21 [ 58.860028][ T8273] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.868114][ T8273] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.876001][ T8273] device bridge_slave_0 entered promiscuous mode [ 58.888526][ T8273] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.895612][ T8273] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.905068][ T8273] device bridge_slave_1 entered promiscuous mode [ 58.958397][ T8276] chnl_net:caif_netlink_parms(): no params data found [ 58.977514][ T8273] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.990139][ T8273] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.023015][ T8271] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 59.071764][ T8271] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 59.142435][ T8273] team0: Port device team_slave_0 added [ 59.151582][ T8273] team0: Port device team_slave_1 added [ 59.174648][ T8271] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.220802][ T8271] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.283610][ T8285] IPVS: ftp: loaded support on port[0] = 21 [ 59.340084][ T8273] device hsr_slave_0 entered promiscuous mode [ 59.397643][ T8273] device hsr_slave_1 entered promiscuous mode [ 59.436983][ T8273] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.462329][ T8276] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.470580][ T8276] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.478658][ T8276] device bridge_slave_0 entered promiscuous mode [ 59.505284][ T8276] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.514058][ T8276] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.521848][ T8276] device bridge_slave_1 entered promiscuous mode [ 59.560562][ T8273] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 59.621543][ T8273] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 59.697769][ T8276] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.712832][ T8276] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.727300][ T8273] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 59.779781][ T8276] team0: Port device team_slave_0 added [ 59.788061][ T8276] team0: Port device team_slave_1 added [ 59.794135][ T8273] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 59.883896][ T8280] chnl_net:caif_netlink_parms(): no params data found [ 59.958643][ T8276] device hsr_slave_0 entered promiscuous mode [ 59.997577][ T8276] device hsr_slave_1 entered promiscuous mode [ 60.036923][ T8276] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.084803][ T8282] chnl_net:caif_netlink_parms(): no params data found [ 60.111561][ T8285] chnl_net:caif_netlink_parms(): no params data found [ 60.156428][ T8282] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.164213][ T8282] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.172318][ T8282] device bridge_slave_0 entered promiscuous mode [ 60.180528][ T8282] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.187842][ T8282] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.195849][ T8282] device bridge_slave_1 entered promiscuous mode [ 60.206198][ T8280] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.213614][ T8280] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.223094][ T8280] device bridge_slave_0 entered promiscuous mode [ 60.236563][ T8271] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.261676][ T8280] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.270288][ T8280] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.278458][ T8280] device bridge_slave_1 entered promiscuous mode [ 60.305699][ T8285] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.313212][ T8285] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.321998][ T8285] device bridge_slave_0 entered promiscuous mode [ 60.339010][ T8271] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.350693][ T8282] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.370919][ T8285] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.379115][ T8285] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.387619][ T8285] device bridge_slave_1 entered promiscuous mode [ 60.394671][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.403374][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.412389][ T8276] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.469950][ T8282] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.488807][ T8280] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.512529][ T8276] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 60.560303][ T8280] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.578729][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.588524][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.598993][ T43] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.606390][ T43] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.614408][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.623601][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.632749][ T43] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.640602][ T43] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.648535][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.658154][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.666701][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.675762][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.685191][ T8276] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 60.728939][ T8276] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 60.784338][ T8285] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.796650][ T8285] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.821724][ T3192] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 60.831774][ T3192] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.842038][ T8282] team0: Port device team_slave_0 added [ 60.863727][ T8271] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 60.875509][ T8271] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.894235][ T8280] team0: Port device team_slave_0 added [ 60.905336][ T8285] team0: Port device team_slave_0 added [ 60.914525][ T8282] team0: Port device team_slave_1 added [ 60.922404][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.931345][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.940356][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.949222][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.958955][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.967841][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.977256][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.996580][ T8273] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.006093][ T8280] team0: Port device team_slave_1 added [ 61.020923][ T8285] team0: Port device team_slave_1 added [ 61.109222][ T8282] device hsr_slave_0 entered promiscuous mode [ 61.147419][ T8282] device hsr_slave_1 entered promiscuous mode [ 61.187103][ T8282] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.249098][ T8280] device hsr_slave_0 entered promiscuous mode [ 61.287173][ T8280] device hsr_slave_1 entered promiscuous mode [ 61.327021][ T8280] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.345008][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 61.353357][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 61.367526][ T8271] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.383523][ T8273] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.393923][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.401822][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.480127][ T8285] device hsr_slave_0 entered promiscuous mode [ 61.527569][ T8285] device hsr_slave_1 entered promiscuous mode [ 61.567012][ T8285] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.591541][ T8282] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 61.661218][ T8282] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 166.696753][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 166.703773][ C1] (detected by 1, t=10502 jiffies, g=6237, q=83) [ 166.710176][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953791-4294943288), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 166.723516][ C1] rcu_preempt R running task 29104 10 2 0x80004008 [ 166.731403][ C1] Call Trace: [ 166.734677][ C1] [ 166.737545][ C1] sched_show_task+0x40f/0x560 [ 166.742310][ C1] rcu_sched_clock_irq+0x1861/0x1ad0 [ 166.747588][ C1] update_process_times+0x12d/0x180 [ 166.752776][ C1] tick_sched_timer+0x263/0x420 [ 166.757613][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.763152][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.768366][ C1] hrtimer_interrupt+0x38c/0xda0 [ 166.773325][ C1] ? debug_smp_processor_id+0x9/0x20 [ 166.778616][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 166.784165][ C1] apic_timer_interrupt+0xf/0x20 [ 166.789089][ C1] [ 166.792019][ C1] RIP: 0010:__memcg_kmem_uncharge+0xd/0x2e0 [ 166.797899][ C1] Code: 81 c3 08 02 00 00 48 89 df 4c 89 f6 e8 dc 7d ff ff 5b 41 5e 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 <50> 89 f3 49 89 fc 48 b8 00 00 00 00 00 fc ff df 4c 8d 77 38 4d 89 [ 166.820829][ C1] RSP: 0018:ffffc90000d0fc10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.829240][ C1] RAX: ffffffff81486ea4 RBX: ffffea00024b7780 RCX: ffff8880a9de8280 [ 166.837207][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00024b7780 [ 166.845162][ C1] RBP: ffffc90000d0fc38 R08: 000000000003a768 R09: fffffbfff120248a [ 166.853209][ C1] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff88808cceada0 [ 166.861166][ C1] R13: dffffc0000000000 R14: 1ffff1101199d5b4 R15: ffff8880950656a8 [ 166.869141][ C1] ? free_thread_stack+0x124/0x590 [ 166.874247][ C1] free_thread_stack+0x12e/0x590 [ 166.879176][ C1] put_task_stack+0xa3/0x130 [ 166.883772][ C1] finish_task_switch+0x3f1/0x550 [ 166.888789][ C1] __schedule+0x9a8/0xcc0 [ 166.893117][ C1] schedule+0x181/0x210 [ 166.897263][ C1] schedule_timeout+0x14f/0x240 [ 166.902104][ C1] ? run_local_timers+0x120/0x120 [ 166.907144][ C1] rcu_gp_kthread+0xed8/0x1770 [ 166.911905][ C1] kthread+0x332/0x350 [ 166.915958][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 166.921055][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.925634][ C1] ret_from_fork+0x24/0x30 [ 166.930066][ C1] rcu: rcu_preempt kthread starved for 10525 jiffies! g6237 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 166.941146][ C1] rcu: RCU grace-period kthread stack dump: [ 166.947022][ C1] rcu_preempt R running task 29104 10 2 0x80004008 [ 166.954911][ C1] Call Trace: [ 166.958182][ C1] [ 166.961025][ C1] sched_show_task+0x40f/0x560 [ 166.965785][ C1] rcu_check_gp_kthread_starvation+0x170/0x1b0 [ 166.972038][ C1] rcu_sched_clock_irq+0x17d3/0x1ad0 [ 166.977335][ C1] update_process_times+0x12d/0x180 [ 166.982536][ C1] tick_sched_timer+0x263/0x420 [ 166.987375][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.992912][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.998110][ C1] hrtimer_interrupt+0x38c/0xda0 [ 167.003053][ C1] ? debug_smp_processor_id+0x9/0x20 [ 167.008329][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 167.013865][ C1] apic_timer_interrupt+0xf/0x20 [ 167.018786][ C1] [ 167.021717][ C1] RIP: 0010:__memcg_kmem_uncharge+0xd/0x2e0 [ 167.027598][ C1] Code: 81 c3 08 02 00 00 48 89 df 4c 89 f6 e8 dc 7d ff ff 5b 41 5e 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 <50> 89 f3 49 89 fc 48 b8 00 00 00 00 00 fc ff df 4c 8d 77 38 4d 89 [ 167.047191][ C1] RSP: 0018:ffffc90000d0fc10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 167.055588][ C1] RAX: ffffffff81486ea4 RBX: ffffea00024b7780 RCX: ffff8880a9de8280 [ 167.063547][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00024b7780 [ 167.071507][ C1] RBP: ffffc90000d0fc38 R08: 000000000003a768 R09: fffffbfff120248a [ 167.079551][ C1] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff88808cceada0 [ 167.087511][ C1] R13: dffffc0000000000 R14: 1ffff1101199d5b4 R15: ffff8880950656a8 [ 167.095502][ C1] ? free_thread_stack+0x124/0x590 [ 167.101130][ C1] free_thread_stack+0x12e/0x590 [ 167.106057][ C1] put_task_stack+0xa3/0x130 [ 167.110725][ C1] finish_task_switch+0x3f1/0x550 [ 167.115742][ C1] __schedule+0x9a8/0xcc0 [ 167.120069][ C1] schedule+0x181/0x210 [ 167.124212][ C1] schedule_timeout+0x14f/0x240 [ 167.129078][ C1] ? run_local_timers+0x120/0x120 [ 167.134216][ C1] rcu_gp_kthread+0xed8/0x1770 [ 167.138988][ C1] kthread+0x332/0x350 [ 167.143047][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 167.148152][ C1] ? kthread_blkcg+0xe0/0xe0 [ 167.152733][ C1] ret_from_fork+0x24/0x30