[ 44.223675][ T26] audit: type=1800 audit(1575320458.791:26): pid=8057 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 44.256272][ T26] audit: type=1800 audit(1575320458.791:27): pid=8057 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 44.305296][ T26] audit: type=1800 audit(1575320458.791:28): pid=8057 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 44.988933][ T26] audit: type=1800 audit(1575320459.601:29): pid=8057 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.103' (ECDSA) to the list of known hosts. 2019/12/02 21:01:09 fuzzer started 2019/12/02 21:01:11 dialing manager at 10.128.0.26:38907 2019/12/02 21:01:11 syscalls: 2697 2019/12/02 21:01:11 code coverage: enabled 2019/12/02 21:01:11 comparison tracing: enabled 2019/12/02 21:01:11 extra coverage: extra coverage is not supported by the kernel 2019/12/02 21:01:11 setuid sandbox: enabled 2019/12/02 21:01:11 namespace sandbox: enabled 2019/12/02 21:01:11 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/02 21:01:11 fault injection: enabled 2019/12/02 21:01:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/02 21:01:11 net packet injection: enabled 2019/12/02 21:01:11 net device setup: enabled 2019/12/02 21:01:11 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/02 21:01:11 devlink PCI setup: PCI device 0000:00:10.0 is not available 21:01:12 executing program 0: mkdir(&(0x7f0000000240)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000080)='./file0\x00', &(0x7f00000000c0)='hugetlbfs\x00', 0x0, 0x0) llistxattr(&(0x7f0000000000)='./file0\x00', &(0x7f0000000100)=""/130, 0x82) 21:01:12 executing program 1: r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='hugetlb.2MB.usage_in_bytes\x00', 0xf0, 0x0) ioctl$PERF_EVENT_IOC_MODIFY_ATTRIBUTES(r0, 0x40086607, &(0x7f0000000000)={0x0, 0x70, 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, 0x10000000, 0x0, 0x0, @perf_bp={0x0}, 0x10814, 0x0, 0x2, 0x0, 0x2a1ce230}) openat$cgroup_ro(0xffffffffffffffff, &(0x7f00000003c0)='cpuacct.usage_percpu\x00', 0x0, 0x0) openat$cgroup_ro(0xffffffffffffffff, &(0x7f0000000480)='cgroup.controllers\x00', 0x0, 0x0) perf_event_open(0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0) r1 = socket$kcm(0x10, 0x3, 0x10) openat$cgroup_ro(0xffffffffffffffff, 0x0, 0x2761, 0x0) r2 = openat$cgroup_ro(0xffffffffffffffff, 0x0, 0x2761, 0x0) setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x84, 0x18, &(0x7f0000000ac0)=r2, 0x8) ioctl$sock_kcm_SIOCKCMUNATTACH(0xffffffffffffffff, 0x89e1, &(0x7f0000000000)) sendmsg(0xffffffffffffffff, 0x0, 0x0) ioctl$PERF_EVENT_IOC_SET_FILTER(0xffffffffffffffff, 0x8914, 0x0) openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x200002, 0x0) socketpair(0x1e, 0x1, 0x0, &(0x7f0000000140)={0x0, 0x0}) ioctl$TUNSETIFF(0xffffffffffffffff, 0x400454ca, &(0x7f0000000080)={'\xf6\xff\xff\xff\xff\xff\xff\xff\x00\xe9\xd5\x00', 0x200091}) socketpair$tipc(0x1e, 0x0, 0x0, &(0x7f0000001040)) socketpair(0x1, 0x0, 0x0, &(0x7f0000000740)) perf_event_open(&(0x7f0000000180)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1ff, 0x8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}, 0x0, 0x0, 0x10b6}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x32, 0x0, 0x0) openat$cgroup_ro(0xffffffffffffffff, 0x0, 0x0, 0x0) gettid() sendmsg$kcm(r1, &(0x7f0000000280)={0x0, 0x7a, &(0x7f0000000040)=[{&(0x7f0000000080)="2e0000002300817ee45de087185082cf0400b0eb04000e00160011000586f9835b3f0a009148790003f85acc7c45", 0x2e}], 0x1}, 0x0) syzkaller login: [ 58.316958][ T8219] IPVS: ftp: loaded support on port[0] = 21 [ 58.455998][ T8219] chnl_net:caif_netlink_parms(): no params data found [ 58.466388][ T8222] IPVS: ftp: loaded support on port[0] = 21 21:01:13 executing program 2: r0 = syz_open_dev$vbi(&(0x7f00000001c0)='/dev/vbi#\x00', 0x1, 0x2) ioctl$VIDIOC_PREPARE_BUF(r0, 0xc058565d, &(0x7f0000000200)={0x0, 0xa, 0x4, 0x0, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, "b31f6bd8"}, 0x0, 0x0, @offset, 0x4}) [ 58.532004][ T8219] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.542110][ T8219] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.554662][ T8219] device bridge_slave_0 entered promiscuous mode [ 58.571918][ T8219] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.580268][ T8219] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.589409][ T8219] device bridge_slave_1 entered promiscuous mode [ 58.637828][ T8219] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.687316][ T8219] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.756598][ T8222] chnl_net:caif_netlink_parms(): no params data found [ 58.770502][ T8219] team0: Port device team_slave_0 added [ 58.778855][ T8219] team0: Port device team_slave_1 added 21:01:13 executing program 3: r0 = openat$nvram(0xffffffffffffff9c, &(0x7f0000001540)='/dev/nvram\x00', 0x80c02, 0x0) perf_event_open(&(0x7f000025c000)={0x2, 0x70, 0x5aeb, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) pwritev(r0, &(0x7f0000001a00)=[{&(0x7f0000001680)='x', 0x1}], 0x1, 0x0) [ 58.813028][ T8225] IPVS: ftp: loaded support on port[0] = 21 [ 58.896519][ T8219] device hsr_slave_0 entered promiscuous mode [ 58.963949][ T8219] device hsr_slave_1 entered promiscuous mode 21:01:13 executing program 4: r0 = socket(0x42000000015, 0x805, 0x0) read$alg(r0, &(0x7f0000000380)=""/80, 0x50) [ 59.007606][ T8222] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.018356][ T8222] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.026351][ T8222] device bridge_slave_0 entered promiscuous mode [ 59.069617][ T8227] IPVS: ftp: loaded support on port[0] = 21 [ 59.079767][ T8222] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.091918][ T8222] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.102415][ T8222] device bridge_slave_1 entered promiscuous mode [ 59.189226][ T8219] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 59.227609][ T8219] netdevsim netdevsim0 netdevsim1: renamed from eth1 21:01:13 executing program 5: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000180)='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) ioctl$KVM_HYPERV_EVENTFD(r1, 0x4020aeb2, &(0x7f0000000000)) [ 59.297966][ T8219] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.367891][ T8222] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.396691][ T8219] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.406181][ T8229] IPVS: ftp: loaded support on port[0] = 21 [ 59.446440][ T8222] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.514242][ T8231] IPVS: ftp: loaded support on port[0] = 21 [ 59.549465][ T8222] team0: Port device team_slave_0 added [ 59.583001][ T8222] team0: Port device team_slave_1 added [ 59.656044][ T8222] device hsr_slave_0 entered promiscuous mode [ 59.683965][ T8222] device hsr_slave_1 entered promiscuous mode [ 59.743821][ T8222] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.757457][ T8227] chnl_net:caif_netlink_parms(): no params data found [ 59.798570][ T8225] chnl_net:caif_netlink_parms(): no params data found [ 59.828629][ T8227] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.836502][ T8227] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.844557][ T8227] device bridge_slave_0 entered promiscuous mode [ 59.870335][ T8227] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.877695][ T8227] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.885725][ T8227] device bridge_slave_1 entered promiscuous mode [ 59.913264][ T8225] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.921566][ T8225] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.929472][ T8225] device bridge_slave_0 entered promiscuous mode [ 59.949093][ T8227] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.961109][ T8227] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.972248][ T8222] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 60.009403][ T8222] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 60.055483][ T8225] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.062596][ T8225] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.071704][ T8225] device bridge_slave_1 entered promiscuous mode [ 60.093566][ T8222] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 60.150546][ T8225] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.162676][ T8225] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.176028][ T8222] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 60.237626][ T8227] team0: Port device team_slave_0 added [ 60.268049][ T8227] team0: Port device team_slave_1 added [ 60.291271][ T8229] chnl_net:caif_netlink_parms(): no params data found [ 60.312630][ T8225] team0: Port device team_slave_0 added [ 60.330629][ T8219] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.356266][ T8225] team0: Port device team_slave_1 added [ 60.367205][ T8229] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.374427][ T8229] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.382056][ T8229] device bridge_slave_0 entered promiscuous mode [ 60.420269][ T8231] chnl_net:caif_netlink_parms(): no params data found [ 60.433471][ T8229] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.442788][ T8229] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.451512][ T8229] device bridge_slave_1 entered promiscuous mode [ 60.505488][ T8225] device hsr_slave_0 entered promiscuous mode [ 60.544153][ T8225] device hsr_slave_1 entered promiscuous mode [ 60.594387][ T8225] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.656531][ T8227] device hsr_slave_0 entered promiscuous mode [ 60.714153][ T8227] device hsr_slave_1 entered promiscuous mode [ 60.763755][ T8227] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.783526][ T8219] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.806175][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.814955][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.842631][ T8231] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.851262][ T8231] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.860087][ T8231] device bridge_slave_0 entered promiscuous mode [ 60.869428][ T8229] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.889652][ T8231] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.897082][ T8231] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.905033][ T8231] device bridge_slave_1 entered promiscuous mode [ 60.911840][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.920582][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.929432][ T3189] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.936681][ T3189] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.945308][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 60.957074][ T8229] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.983039][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.992865][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.001575][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.008824][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.032207][ T8222] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.047887][ T8231] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.061494][ T8229] team0: Port device team_slave_0 added [ 61.067587][ T8225] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 61.125606][ T8222] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.133802][ T8231] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.146911][ T8229] team0: Port device team_slave_1 added [ 61.164814][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.173354][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.182423][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.190387][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.198254][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.207785][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.216493][ T8225] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 61.246902][ T8225] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 61.306425][ T8225] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 61.357346][ T8227] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 61.416189][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.424525][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.432980][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.456892][ T8231] team0: Port device team_slave_0 added [ 61.463251][ T8227] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 61.500973][ T8227] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 61.547376][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.557332][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.565961][ T8232] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.573004][ T8232] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.580765][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.589491][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.598142][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.608242][ T8231] team0: Port device team_slave_1 added [ 61.656817][ T8229] device hsr_slave_0 entered promiscuous mode [ 61.724089][ T8229] device hsr_slave_1 entered promiscuous mode [ 61.773913][ T8229] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.782441][ T8227] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 61.854861][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.863543][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.872381][ T3189] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.879481][ T3189] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.887470][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.895921][ T3189] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.908517][ T8219] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.947911][ T8231] device hsr_slave_0 entered promiscuous mode [ 62.004173][ T8231] device hsr_slave_1 entered promiscuous mode [ 62.053872][ T8231] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.074653][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 62.113161][ T8219] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.130058][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 62.140004][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 62.151958][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.160559][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 62.169735][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.178185][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 62.186686][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.194979][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.202382][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.210797][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.241058][ T8222] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 62.258243][ T8222] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.290178][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 62.300737][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.315800][ T8231] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 62.348791][ T8231] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 62.386142][ T8229] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 62.441274][ T8225] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.462305][ T8231] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 167.493601][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 167.500421][ C1] rcu: 1-...!: (10499 ticks this GP) idle=baa/1/0x4000000000000002 softirq=11529/11529 fqs=0 [ 167.510911][ C1] (t=10501 jiffies g=6449 q=144) [ 167.515928][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g6449 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 167.527293][ C1] rcu: RCU grace-period kthread stack dump: [ 167.533606][ C1] rcu_preempt I29032 10 2 0x80004000 [ 167.540079][ C1] Call Trace: [ 167.543394][ C1] __schedule+0x9a0/0xcc0 [ 167.547773][ C1] schedule+0x181/0x210 [ 167.552050][ C1] schedule_timeout+0x14f/0x240 [ 167.556997][ C1] ? run_local_timers+0x120/0x120 [ 167.562048][ C1] rcu_gp_kthread+0xed8/0x1770 [ 167.566845][ C1] kthread+0x332/0x350 [ 167.571049][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 167.576162][ C1] ? kthread_blkcg+0xe0/0xe0 [ 167.580889][ C1] ret_from_fork+0x24/0x30 [ 167.585388][ C1] NMI backtrace for cpu 1 [ 167.589899][ C1] CPU: 1 PID: 7889 Comm: udevd Not tainted 5.4.0-syzkaller #0 [ 167.600385][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.610438][ C1] Call Trace: [ 167.614817][ C1] [ 167.617708][ C1] dump_stack+0x1fb/0x318 [ 167.622146][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 167.632238][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 167.639203][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 167.647454][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 167.653435][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 167.659336][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 167.664473][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 167.669668][ C1] ? trace_hardirqs_off+0x74/0x80 [ 167.674686][ C1] update_process_times+0x12d/0x180 [ 167.679878][ C1] tick_sched_timer+0x263/0x420 [ 167.684720][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 167.690259][ C1] __hrtimer_run_queues+0x403/0x840 [ 167.695490][ C1] hrtimer_interrupt+0x38c/0xda0 [ 167.700436][ C1] ? debug_smp_processor_id+0x9/0x20 [ 167.705718][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 167.711256][ C1] apic_timer_interrupt+0xf/0x20 [ 167.716357][ C1] [ 167.719286][ C1] RIP: 0010:free_thread_stack+0x195/0x590 [ 167.724995][ C1] Code: 2e 00 74 08 4c 89 e7 e8 09 a4 69 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 eb a3 69 00 <48> 8b 1b e9 82 ff ff ff e8 de 2c 2e 00 43 80 3c 2e 00 75 18 eb 1e [ 167.744879][ C1] RSP: 0018:ffffc90006ea77b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 167.753300][ C1] RAX: 1ffff11013d8d4b1 RBX: ffff88809ec6a588 RCX: ffff88808f800600 [ 167.761527][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002434cc0 [ 167.771594][ C1] RBP: ffffc90006ea77f0 R08: 000000000003a768 R09: ffffed10150aba97 [ 167.779566][ C1] R10: ffffed10150aba97 R11: 0000000000000000 R12: ffff88809ec6a620 [ 167.787760][ C1] R13: dffffc0000000000 R14: 1ffff11013d8d4c4 R15: ffff8880a855d4a8 [ 167.796025][ C1] ? free_thread_stack+0x168/0x590 [ 167.801129][ C1] put_task_stack+0xa3/0x130 [ 167.805710][ C1] finish_task_switch+0x3f1/0x550 [ 167.810730][ C1] __schedule+0x9a8/0xcc0 [ 167.815062][ C1] preempt_schedule_irq+0xc1/0x140 [ 167.820165][ C1] retint_kernel+0x1b/0x2b [ 167.824576][ C1] RIP: 0010:__rcu_read_unlock+0xc4/0x680 [ 167.830656][ C1] Code: eb 23 44 8d 7b ff 43 8a 44 35 00 84 c0 0f 85 c6 04 00 00 45 89 3c 24 81 c3 fd ff ff 3f 81 fb fd ff ff 3f 76 0f 48 83 c4 28 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 0f 0b eb ed 44 89 e1 80 e1 07 80 c1 [ 167.851069][ C1] RSP: 0018:ffffc90006ea7a08 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 [ 167.859562][ C1] RAX: ffffffff81c95100 RBX: dffffc0000000000 RCX: ffff88808f800600 [ 167.867531][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880aec37e60 [ 167.875493][ C1] RBP: ffffc90006ea7a28 R08: dffffc0000000000 R09: ffffed1015d86fcd [ 167.883455][ C1] R10: ffffed1015d86fcd R11: 0000000000000000 R12: ffff88808f800978 [ 167.891417][ C1] R13: 1ffff11011f0012f R14: dffffc0000000000 R15: 0000000000000001 [ 167.899393][ C1] ? prepend_path+0x610/0xa70 [ 167.904068][ C1] prepend_path+0x735/0xa70 [ 167.908750][ C1] d_absolute_path+0xde/0x190 [ 167.913425][ C1] tomoyo_realpath_from_path+0x46b/0x7c0 [ 167.919056][ C1] tomoyo_path_perm+0x192/0x850 [ 167.923923][ C1] tomoyo_inode_getattr+0x1c/0x20 [ 167.929029][ C1] security_inode_getattr+0xd5/0x150 [ 167.934394][ C1] vfs_getattr+0x2a/0x6d0 [ 167.938892][ C1] ? user_path_at_empty+0x40/0x50 [ 167.943908][ C1] __se_sys_newstat+0x9a/0x150 [ 167.948664][ C1] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 167.954723][ C1] ? prepare_exit_to_usermode+0x221/0x5b0 [ 167.960433][ C1] ? check_preemption_disabled+0xb4/0x260 [ 167.966246][ C1] ? debug_smp_processor_id+0x9/0x20 [ 167.971537][ C1] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 167.977250][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 167.982717][ C1] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 167.988870][ C1] __x64_sys_newstat+0x5b/0x70 [ 167.993826][ C1] do_syscall_64+0xf7/0x1c0 [ 167.999095][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 168.007247][ C1] RIP: 0033:0x7f03e484cc65 [ 168.011658][ C1] Code: 00 00 00 e8 5d 01 00 00 48 83 c4 18 c3 90 90 90 90 90 90 90 90 83 ff 01 48 89 f0 77 18 48 89 c7 48 89 d6 b8 04 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 17 f3 c3 90 48 8b 05 a1 51 2b 00 64 c7 00 16 [ 168.031261][ C1] RSP: 002b:00007ffcf9b72938 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 [ 168.040112][ C1] RAX: ffffffffffffffda RBX: 00007ffcf9b729d0 RCX: 00007f03e484cc65 [ 168.048081][ C1] RDX: 00007ffcf9b72940 RSI: 00007ffcf9b72940 RDI: 00007ffcf9b729d0 [ 168.056066][ C1] RBP: 00000000016e32b0 R08: 00007ffcf9b729e0 R09: 00007f03e48a2de0 [ 168.064035][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000016e1250 [ 168.072003][ C1] R13: 0000000000000000 R14: 00000000016e1250 R15: 000000000000000b