[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 42.095538][ T25] audit: type=1800 audit(1575388337.448:25): pid=7991 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 42.114917][ T25] audit: type=1800 audit(1575388337.448:26): pid=7991 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.134499][ T25] audit: type=1800 audit(1575388337.448:27): pid=7991 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 '10.128.0.133' (ECDSA) to the list of known hosts. 2019/12/03 15:52:25 fuzzer started 2019/12/03 15:52:27 dialing manager at 10.128.0.26:45711 2019/12/03 15:52:27 syscalls: 2689 2019/12/03 15:52:27 code coverage: enabled 2019/12/03 15:52:27 comparison tracing: enabled 2019/12/03 15:52:27 extra coverage: extra coverage is not supported by the kernel 2019/12/03 15:52:27 setuid sandbox: enabled 2019/12/03 15:52:27 namespace sandbox: enabled 2019/12/03 15:52:27 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 15:52:27 fault injection: enabled 2019/12/03 15:52:27 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 15:52:27 net packet injection: enabled 2019/12/03 15:52:27 net device setup: enabled 2019/12/03 15:52:27 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 15:52:27 devlink PCI setup: PCI device 0000:00:10.0 is not available 15:52:28 executing program 0: r0 = syz_open_dev$evdev(&(0x7f0000000100)='/dev/input/event#\x00', 0x0, 0x0) ioctl$EVIOCGRAB(r0, 0x40044590, &(0x7f0000001200)) ioctl$EVIOCREVOKE(r0, 0x40044590, 0x0) ioctl$EVIOCGBITKEY(r0, 0x80404521, &(0x7f0000000180)=""/4096) 15:52:28 executing program 1: pipe(&(0x7f0000000080)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = socket$inet6_tcp(0xa, 0x1, 0x0) r3 = fcntl$dupfd(r2, 0x0, r2) ioctl$PERF_EVENT_IOC_ENABLE(r3, 0x8912, 0x400200) sendmsg$nl_generic(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, 0x0}, 0x0) vmsplice(r1, &(0x7f00000000c0)=[{&(0x7f0000000180)="77690addcfbe1fbb66ec", 0xff3b}], 0x1, 0x1) close(r1) r4 = socket(0x10, 0x3, 0x0) setsockopt$netlink_NETLINK_TX_RING(r4, 0x10e, 0xc, &(0x7f0000000040)={0x7ff}, 0xad) write(0xffffffffffffffff, &(0x7f0000000180)="1c0000004a005f0214f9f424000904000a", 0x11) splice(r0, 0x0, r1, 0x0, 0x10000, 0x0) syzkaller login: [ 53.463387][ T8156] IPVS: ftp: loaded support on port[0] = 21 [ 53.625568][ T8156] chnl_net:caif_netlink_parms(): no params data found [ 53.664812][ T8159] IPVS: ftp: loaded support on port[0] = 21 15:52:29 executing program 2: r0 = socket$inet6_sctp(0xa, 0x10000000005, 0x84) getsockopt$inet_sctp6_SCTP_SOCKOPT_PEELOFF(r0, 0x84, 0xe, 0x0, &(0x7f0000000140)=0x15b) [ 53.688831][ T8156] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.699631][ T8156] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.708779][ T8156] device bridge_slave_0 entered promiscuous mode [ 53.732183][ T8156] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.739998][ T8156] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.749068][ T8156] device bridge_slave_1 entered promiscuous mode [ 53.807272][ T8156] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 53.831053][ T8156] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 53.913649][ T8156] team0: Port device team_slave_0 added [ 53.940341][ T8159] chnl_net:caif_netlink_parms(): no params data found [ 53.950592][ T8156] team0: Port device team_slave_1 added 15:52:29 executing program 3: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r0 = socket$inet6_tcp(0xa, 0x1, 0x0) bind$inet6(r0, &(0x7f0000000100)={0xa, 0x4e22}, 0x1c) getsockopt$inet_sctp6_SCTP_LOCAL_AUTH_CHUNKS(0xffffffffffffffff, 0x84, 0x1b, 0x0, 0x0) getsockopt$inet_sctp_SCTP_SOCKOPT_PEELOFF(0xffffffffffffffff, 0x84, 0x66, 0x0, 0x0) listen(r0, 0x0) r1 = socket$inet6_tcp(0xa, 0x1, 0x0) ioctl$sock_SIOCGSKNS(0xffffffffffffffff, 0x894c, 0x0) lsetxattr$security_ima(0x0, 0x0, 0x0, 0x0, 0x0) setsockopt$SO_TIMESTAMPING(0xffffffffffffffff, 0x1, 0x0, 0x0, 0x0) dup(0xffffffffffffffff) sendto$inet6(r1, 0x0, 0x0, 0x20000004, &(0x7f000031e000)={0xa, 0x4e22}, 0x1c) madvise(&(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0) sendmsg(0xffffffffffffffff, 0x0, 0x0) pipe(0x0) shutdown(r1, 0x1) recvfrom$inet6(r1, &(0x7f0000001840)=""/31, 0xfffffe0e, 0x100, &(0x7f0000001880)={0xa, 0x0, 0xffff}, 0x1c) r2 = accept4(r0, 0x0, 0x0, 0x0) sendto$inet6(r2, &(0x7f00000000c0), 0xfffffdda, 0x0, 0x0, 0x0) [ 53.973005][ T8162] IPVS: ftp: loaded support on port[0] = 21 [ 54.068763][ T8156] device hsr_slave_0 entered promiscuous mode [ 54.125862][ T8156] device hsr_slave_1 entered promiscuous mode 15:52:29 executing program 4: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4000000000004e22}, 0x1c) setsockopt$sock_int(r0, 0x1, 0xf, &(0x7f0000000040)=0x6, 0x4) r1 = socket$inet6_tcp(0xa, 0x1, 0x0) setsockopt$sock_int(r1, 0x1, 0xf, &(0x7f0000000080)=0x3ff, 0x4) bind$inet6(r1, &(0x7f0000000440)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r1, 0x0) [ 54.219626][ T8164] IPVS: ftp: loaded support on port[0] = 21 [ 54.253872][ T8159] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.266650][ T8159] bridge0: port 1(bridge_slave_0) entered disabled state [ 54.285777][ T8159] device bridge_slave_0 entered promiscuous mode [ 54.307591][ T8159] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.314647][ T8159] bridge0: port 2(bridge_slave_1) entered disabled state [ 54.335710][ T8159] device bridge_slave_1 entered promiscuous mode [ 54.415423][ T8159] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 54.447137][ T8159] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link 15:52:29 executing program 5: r0 = creat(&(0x7f0000000000)='./file0\x00', 0x0) fallocate(r0, 0x0, 0x0, 0x2000002) r1 = open$dir(&(0x7f0000000100)='./file0\x00', 0x4002, 0x0) truncate(&(0x7f0000000240)='./file0\x00', 0x90002) perf_event_open(&(0x7f0000000040)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 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, @perf_bp={0x0}}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) sendfile(r1, r1, 0x0, 0x8800000) [ 54.469433][ T8156] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 54.509626][ T8156] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 54.595028][ T8156] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 54.647662][ T8156] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 54.708763][ T8159] team0: Port device team_slave_0 added [ 54.728952][ T8169] IPVS: ftp: loaded support on port[0] = 21 [ 54.743869][ T8166] IPVS: ftp: loaded support on port[0] = 21 [ 54.750589][ T8162] chnl_net:caif_netlink_parms(): no params data found [ 54.764933][ T8159] team0: Port device team_slave_1 added [ 54.825487][ T8162] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.832650][ T8162] bridge0: port 1(bridge_slave_0) entered disabled state [ 54.841603][ T8162] device bridge_slave_0 entered promiscuous mode [ 54.897653][ T8159] device hsr_slave_0 entered promiscuous mode [ 54.955453][ T8159] device hsr_slave_1 entered promiscuous mode [ 55.005126][ T8159] debugfs: Directory 'hsr0' with parent '/' already present! [ 55.030489][ T8162] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.037807][ T8162] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.046621][ T8162] device bridge_slave_1 entered promiscuous mode [ 55.091945][ T8162] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.106164][ T8162] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.184920][ T8164] chnl_net:caif_netlink_parms(): no params data found [ 55.197595][ T8159] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 55.267874][ T8159] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 55.310895][ T8159] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 55.379130][ T8162] team0: Port device team_slave_0 added [ 55.390238][ T8159] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 55.448741][ T8166] chnl_net:caif_netlink_parms(): no params data found [ 55.464742][ T8162] team0: Port device team_slave_1 added [ 55.484430][ T8156] 8021q: adding VLAN 0 to HW filter on device bond0 [ 55.536348][ T8156] 8021q: adding VLAN 0 to HW filter on device team0 [ 55.543178][ T8166] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.551459][ T8166] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.559501][ T8166] device bridge_slave_0 entered promiscuous mode [ 55.570952][ T8166] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.578075][ T8166] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.586031][ T8166] device bridge_slave_1 entered promiscuous mode [ 55.602756][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 55.611432][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 55.667694][ T8162] device hsr_slave_0 entered promiscuous mode [ 55.705445][ T8162] device hsr_slave_1 entered promiscuous mode [ 55.745175][ T8162] debugfs: Directory 'hsr0' with parent '/' already present! [ 55.755315][ T8164] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.762467][ T8164] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.770531][ T8164] device bridge_slave_0 entered promiscuous mode [ 55.778797][ T8164] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.785940][ T8164] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.794123][ T8164] device bridge_slave_1 entered promiscuous mode [ 55.835427][ T8174] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 55.844386][ T8174] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 55.856271][ T8174] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.863512][ T8174] bridge0: port 1(bridge_slave_0) entered forwarding state [ 55.871955][ T8174] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 55.880975][ T8174] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 55.889383][ T8174] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.896456][ T8174] bridge0: port 2(bridge_slave_1) entered forwarding state [ 55.908241][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 55.918330][ T8166] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.931449][ T8166] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.952942][ T8166] team0: Port device team_slave_0 added [ 55.962366][ T8164] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.973506][ T8164] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.983976][ T8169] chnl_net:caif_netlink_parms(): no params data found [ 55.997695][ T8166] team0: Port device team_slave_1 added [ 56.022591][ T8164] team0: Port device team_slave_0 added [ 56.047795][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 56.063901][ T8159] 8021q: adding VLAN 0 to HW filter on device bond0 [ 56.083327][ T8156] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 56.094245][ T8156] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 56.108951][ T8164] team0: Port device team_slave_1 added [ 56.132297][ T8169] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.140680][ T8169] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.149993][ T8169] device bridge_slave_0 entered promiscuous mode [ 56.158098][ T8169] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.166854][ T8169] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.174462][ T8169] device bridge_slave_1 entered promiscuous mode [ 56.181907][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 56.190501][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 56.199265][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 56.207644][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 56.216193][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 56.224364][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 56.232831][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 56.241431][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 56.250081][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 56.259236][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 56.267115][ T8168] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 56.317594][ T8166] device hsr_slave_0 entered promiscuous mode [ 56.375371][ T8166] device hsr_slave_1 entered promiscuous mode [ 56.415127][ T8166] debugfs: Directory 'hsr0' with parent '/' already present! [ 56.422747][ T8162] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 56.498536][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 56.506402][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 56.513979][ T8162] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 56.558617][ T8159] 8021q: adding VLAN 0 to HW filter on device team0 [ 56.617925][ T8164] device hsr_slave_0 entered promiscuous mode [ 56.696145][ T8164] device hsr_slave_1 entered promiscuous mode [ 56.765539][ T8164] debugfs: Directory 'hsr0' with parent '/' already present! [ 56.774318][ T8169] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.785704][ T8169] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.799090][ T8162] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 56.884831][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 56.893481][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 56.902048][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.909134][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.916922][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 56.924317][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 56.938077][ T8162] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 56.994184][ T8171] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 57.002599][ T8171] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 57.011425][ T8171] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 57.020384][ T8171] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.027490][ T8171] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.038491][ T8169] team0: Port device team_slave_0 added [ 57.072626][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 57.081733][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 57.091140][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 57.100392][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 57.108959][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 57.117789][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 57.127343][ T8169] team0: Port device team_slave_1 added [ 57.134054][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 57.142132][ T8166] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 57.196905][ T8164] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 57.238830][ T8164] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 57.287698][ T8164] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 57.358671][ T8164] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 57.399679][ T8156] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 57.413244][ T8166] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 57.457263][ T8166] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 57.508252][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 57.517049][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 57.532708][ T8159] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 57.546354][ T8159] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 57.568913][ T8159] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 57.577605][ T8166] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 57.667728][ T8169] device hsr_slave_0 entered promiscuous mode [ 57.685415][ T8169] device hsr_slave_1 entered promiscuous mode [ 57.725168][ T8169] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.732821][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 57.741210][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 57.749684][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 57.757394][ T3117] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 57.850170][ T8162] 8021q: adding VLAN 0 to HW filter on device bond0 [ 162.894954][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 162.901720][ C1] rcu: 1-...!: (10499 ticks this GP) idle=b3e/1/0x4000000000000002 softirq=10870/10870 fqs=1 [ 162.912265][ C1] (t=10500 jiffies g=6309 q=315) [ 162.917302][ C1] rcu: rcu_preempt kthread starved for 10498 jiffies! g6309 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 162.928396][ C1] rcu: RCU grace-period kthread stack dump: [ 162.934298][ C1] rcu_preempt R running task 29104 10 2 0x80004000 [ 162.942214][ C1] Call Trace: [ 162.945507][ C1] __schedule+0x9a0/0xcc0 [ 162.950561][ C1] schedule+0x181/0x210 [ 162.954722][ C1] schedule_timeout+0x14f/0x240 [ 162.960009][ C1] ? run_local_timers+0x120/0x120 [ 162.965127][ C1] rcu_gp_kthread+0xed8/0x1770 [ 162.969889][ C1] kthread+0x332/0x350 [ 162.973944][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 162.979143][ C1] ? kthread_blkcg+0xe0/0xe0 [ 162.984158][ C1] ret_from_fork+0x24/0x30 [ 162.988583][ C1] NMI backtrace for cpu 1 [ 162.992942][ C1] CPU: 1 PID: 8179 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 163.001265][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 163.011327][ C1] Call Trace: [ 163.014688][ C1] [ 163.017534][ C1] dump_stack+0x1fb/0x318 [ 163.021855][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 163.026689][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 163.032826][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 163.038876][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 163.044866][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 163.050768][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 163.055900][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 163.061098][ C1] ? trace_hardirqs_off+0x74/0x80 [ 163.066114][ C1] update_process_times+0x12d/0x180 [ 163.071312][ C1] tick_sched_timer+0x263/0x420 [ 163.076175][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 163.081727][ C1] __hrtimer_run_queues+0x403/0x840 [ 163.086938][ C1] hrtimer_interrupt+0x38c/0xda0 [ 163.091911][ C1] ? debug_smp_processor_id+0x9/0x20 [ 163.097196][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 163.102743][ C1] apic_timer_interrupt+0xf/0x20 [ 163.107668][ C1] [ 163.110601][ C1] RIP: 0010:free_thread_stack+0x124/0x590 [ 163.116309][ C1] Code: ff 48 c1 e8 06 48 83 e0 c0 48 bf 00 00 00 00 00 ea ff ff 48 01 c7 be 03 00 00 00 e8 06 a2 60 00 e9 5d 04 00 00 e8 5c 2d 2e 00 <48> 89 df 31 f6 e8 42 af 6e 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 43 [ 163.135911][ C1] RSP: 0018:ffffc900023e7818 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 163.144318][ C1] RAX: ffffffff81486ea4 RBX: ffffea0001b0ce40 RCX: ffff88809540c240 [ 163.152277][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0001b0ce40 [ 163.160238][ C1] RBP: ffffc900023e7850 R08: 000000000003a768 R09: ffffed10150f274f [ 163.168202][ C1] R10: ffffed10150f274f R11: 0000000000000000 R12: ffff8880988950a0 [ 163.176593][ C1] R13: dffffc0000000000 R14: 1ffff11013112a14 R15: ffff8880a8793a68 [ 163.184560][ C1] ? free_thread_stack+0x124/0x590 [ 163.189662][ C1] ? free_thread_stack+0x124/0x590 [ 163.194766][ C1] put_task_stack+0xa3/0x130 [ 163.199346][ C1] finish_task_switch+0x3f1/0x550 [ 163.204370][ C1] __schedule+0x9a8/0xcc0 [ 163.208698][ C1] preempt_schedule_irq+0xc1/0x140 [ 163.213796][ C1] retint_kernel+0x1b/0x2b [ 163.218198][ C1] RIP: 0010:trace_mm_page_alloc+0x0/0x1f0 [ 163.223907][ C1] Code: c2 d0 4e bf 88 8b 4d 84 31 c0 e8 9b be ff ff eb a3 0f 0b e9 7a d9 ff ff e8 0d 13 9f ff 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 50 89 4d d0 89 55 d4 49 be [ 163.243495][ C1] RSP: 0000:ffffc900023e7a60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 163.251893][ C1] RAX: 1ffff9200047cf00 RBX: ffffea0001bf8e00 RCX: 0000000000000001 [ 163.259850][ C1] RDX: 0000000000100dca RSI: 0000000000000000 RDI: ffffea0001bf8e00 [ 163.267805][ C1] RBP: ffffc900023e7af0 R08: ffffffff81b169ec R09: ffffed100dfc7000 [ 163.275762][ C1] R10: fffff9400037f1c7 R11: 0000000000000000 R12: 1ffff9200047cf57 [ 163.283718][ C1] R13: dffffc0000000000 R14: 0000000000100dca R15: 0000000000000000 [ 163.291710][ C1] ? page_poisoning_enabled+0x1c/0x30 [ 163.297163][ C1] ? __alloc_pages_nodemask+0x2e3/0x5d0 [ 163.302701][ C1] alloc_pages_vma+0x4f7/0xd50 [ 163.307456][ C1] wp_page_copy+0x1e2/0x1ca0 [ 163.312051][ C1] ? do_raw_spin_unlock+0x136/0x260 [ 163.317249][ C1] do_wp_page+0x5e4/0x16d0 [ 163.321652][ C1] ? __kasan_check_write+0x14/0x20 [ 163.326769][ C1] handle_mm_fault+0x23c5/0x2890 [ 163.331712][ C1] do_user_addr_fault+0x589/0xaf0 [ 163.336732][ C1] __do_page_fault+0xd3/0x1f0 [ 163.341409][ C1] do_page_fault+0x99/0xb0 [ 163.345902][ C1] page_fault+0x39/0x40 [ 163.350054][ C1] RIP: 0033:0x40f6c8 [ 163.353932][ C1] Code: 8b 34 c6 4a 8d 04 2e 48 3d ff ff ff 7e 0f 86 77 ff ff ff bf 64 fe 4b 00 31 c0 e8 13 27 ff ff 31 ff e8 5c 23 ff ff 0f 1f 40 00 <89> 3c b5 00 00 73 00 eb b6 31 ed 0f 1f 44 00 00 80 3d 7e 2f 66 00 [ 163.373532][ C1] RSP: 002b:00007ffdc69756e0 EFLAGS: 00010246 [ 163.379584][ C1] RAX: 00000000817c3a0f RBX: 00000000bace1edf RCX: 0000001b32720000 [ 163.387716][ C1] RDX: 0000000000000000 RSI: 0000000000001a0f RDI: ffffffff817c3a0f [ 163.395673][ C1] RBP: 0000000000000000 R08: 00000000817c3a0f R09: 00000000817c3a13 [ 163.403630][ C1] R10: 00007ffdc6975880 R11: 0000000000000246 R12: 000000000075bfa8 [ 163.411673][ C1] R13: 0000000080000000 R14: 00007f9f4f585008 R15: 0000000000000000 [ 163.422342][ C1] ? trace_hardirqs_off_caller+0xf/0x80