[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 47.312592][ T24] audit: type=1800 audit(1575445159.396:25): pid=8248 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 47.342472][ T24] audit: type=1800 audit(1575445159.396:26): pid=8248 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 47.380625][ T24] audit: type=1800 audit(1575445159.396:27): pid=8248 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 '10.128.0.85' (ECDSA) to the list of known hosts. 2019/12/04 07:39:30 fuzzer started syzkaller login: [ 58.934908][ T8405] cc1 (8405) used greatest stack depth: 23592 bytes left 2019/12/04 07:39:32 dialing manager at 10.128.0.26:42111 2019/12/04 07:39:32 syscalls: 2689 2019/12/04 07:39:32 code coverage: enabled 2019/12/04 07:39:32 comparison tracing: enabled 2019/12/04 07:39:32 extra coverage: extra coverage is not supported by the kernel 2019/12/04 07:39:32 setuid sandbox: enabled 2019/12/04 07:39:32 namespace sandbox: enabled 2019/12/04 07:39:32 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 07:39:32 fault injection: enabled 2019/12/04 07:39:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 07:39:32 net packet injection: enabled 2019/12/04 07:39:32 net device setup: enabled 2019/12/04 07:39:32 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 07:39:32 devlink PCI setup: PCI device 0000:00:10.0 is not available 07:39:33 executing program 0: r0 = fsopen(&(0x7f00000001c0)='cgroup2\x00w\xbe\xb8\x1b\xd7v|\xb6Wq\xed\xff\x7f\xd2\xe8\xf3Xu|]\x03\xf7\x13m\a\x9a\r[\x9e\"\xc6\xe7E8\xdf\xbb\xf8\xb1\x183\x94FI\xf4\xa66\xad\xef7\xaa\x9e\xf5\x19W\xda\x03Y\xdc\bO5\x97\xf5\xdfo\x0f\xe4[\xde0\xcc\xa2\x00s\xe2\xf3E\bc\x1aq?\xe55\xc4\xbf\xcc\xf6\\\x1a15\f\x8b(\x8a|\xa5\x86\x11\xe3G\x17I\xc2\xa5\x16q\xeb\x90\xe6Gj\x9a\xd7g\xf8\x8e>\xb2\x15\x89\a\xff\xdb\xc6\xf1%9\xce\xc13\x1a\xb1\xe9\xb1B\xfd\xb8\x18\xfc\xd8Md\xe7\xa6\x8dn/\xb3wx\x81\xedl\x8e\xa13\xcc\b\xa5\xa2\xe4', 0x0) fsconfig$FSCONFIG_CMD_RECONFIGURE(r0, 0x6, 0x0, 0x0, 0x0) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = dup(r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) fsmount(r0, 0x0, 0xb) 07:39:33 executing program 1: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000240)='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) add_key$keyring(0x0, 0x0, 0x0, 0x0, 0x0) keyctl$KEYCTL_PKEY_ENCRYPT(0x19, &(0x7f0000000280)={0x0, 0x0, 0x86}, 0x0, &(0x7f00000003c0), &(0x7f0000000400)=""/134) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_SET_USER_MEMORY_REGION(r1, 0x4020ae46, &(0x7f0000000400)={0x0, 0x3, 0x0, 0x2000, &(0x7f0000000000/0x2000)=nil}) syz_kvm_setup_cpu$x86(r1, 0xffffffffffffffff, &(0x7f0000000000/0x18000)=nil, 0x0, 0x0, 0x0, 0x0, 0x0) memfd_create(0x0, 0x0) ptrace(0x4200, 0x0) r3 = openat$nvme_fabrics(0xffffffffffffff9c, &(0x7f0000000040)='/dev/nvme-fabrics\x00', 0x12200, 0x0) getsockopt$inet6_dccp_int(r3, 0x21, 0x0, &(0x7f0000000080), &(0x7f00000000c0)=0x4) ioctl$FS_IOC_RESVSP(0xffffffffffffffff, 0x40305828, &(0x7f0000000000)={0x0, 0x1, 0xbf4}) ptrace$pokeuser(0x6, 0x0, 0x0, 0x0) open(&(0x7f0000000440)='./bus\x00', 0x0, 0x0) fsetxattr$trusted_overlay_nlink(0xffffffffffffffff, &(0x7f0000000100)='trusted.overlay.nlink\x00', 0x0, 0x0, 0x1) socket$inet6_udp(0xa, 0x2, 0x0) openat$rdma_cm(0xffffffffffffff9c, &(0x7f0000000200)='/dev/infiniband/rdma_cm\x00', 0x2, 0x0) ioctl$KVM_REGISTER_COALESCED_MMIO(r1, 0x4010ae67, &(0x7f00000001c0)={0x0, 0x119000}) syz_kvm_setup_cpu$x86(0xffffffffffffffff, r2, &(0x7f0000000000/0x18000)=nil, 0x0, 0xfefd, 0x0, 0x0, 0x663abba741622feb) ioctl$KVM_NMI(r2, 0xae9a) perf_event_open(&(0x7f0000000180)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1ff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xfffffffffffffffd, 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, 0x22000, 0x0, 0x0, 0x7}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) ioctl$KVM_RUN(r2, 0xae80, 0x0) [ 61.381860][ T8413] IPVS: ftp: loaded support on port[0] = 21 [ 61.521243][ T8415] IPVS: ftp: loaded support on port[0] = 21 07:39:33 executing program 2: bpf$PROG_LOAD(0x5, &(0x7f0000b7a000)={0x9, 0x4, &(0x7f0000010a00)=@framed={{}, [@alu={0x8000000201a7fe3, 0x0, 0x7, 0x61, 0x0, 0x3a}]}, &(0x7f0000000000)='syzkaller\x00'}, 0x48) [ 61.653431][ T8413] chnl_net:caif_netlink_parms(): no params data found [ 61.779505][ T8419] IPVS: ftp: loaded support on port[0] = 21 [ 61.792591][ T8415] chnl_net:caif_netlink_parms(): no params data found [ 61.810982][ T8413] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.819510][ T8413] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.827846][ T8413] device bridge_slave_0 entered promiscuous mode [ 61.864885][ T8413] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.871988][ T8413] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.880870][ T8413] device bridge_slave_1 entered promiscuous mode [ 61.903733][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state 07:39:34 executing program 3: r0 = io_uring_setup(0xa4, &(0x7f0000000100)) io_uring_register$IORING_REGISTER_FILES_UPDATE(r0, 0x6, 0x0, 0x0) [ 61.911011][ T8415] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.919960][ T8415] device bridge_slave_0 entered promiscuous mode [ 61.952172][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.959264][ T8415] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.970359][ T8415] device bridge_slave_1 entered promiscuous mode [ 61.982564][ T8413] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.031266][ T8413] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.050120][ T8415] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.066241][ T8415] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.149663][ T8413] team0: Port device team_slave_0 added [ 62.174784][ T8415] team0: Port device team_slave_0 added [ 62.185184][ T8413] team0: Port device team_slave_1 added 07:39:34 executing program 4: r0 = socket$inet_dccp(0x2, 0x6, 0x0) setsockopt(r0, 0x800000000010d, 0x8000000011, &(0x7f00001c9fff), 0xc5) sendto$inet(r0, 0x0, 0x0, 0x40, 0x0, 0x0) [ 62.256465][ T8413] device hsr_slave_0 entered promiscuous mode [ 62.324697][ T8413] device hsr_slave_1 entered promiscuous mode [ 62.364954][ T8415] team0: Port device team_slave_1 added [ 62.374369][ T8419] chnl_net:caif_netlink_parms(): no params data found [ 62.399057][ T8424] IPVS: ftp: loaded support on port[0] = 21 07:39:34 executing program 5: r0 = memfd_create(&(0x7f0000000440)='\x00', 0x5) ioctl$FS_IOC_RESVSP(r0, 0x40305828, &(0x7f0000000040)={0x0, 0x0, 0x0, 0x1000}) [ 62.437982][ T8422] IPVS: ftp: loaded support on port[0] = 21 [ 62.505406][ T8415] device hsr_slave_0 entered promiscuous mode [ 62.544908][ T8415] device hsr_slave_1 entered promiscuous mode [ 62.582661][ T8415] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.627346][ T8419] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.640045][ T8426] IPVS: ftp: loaded support on port[0] = 21 [ 62.640869][ T8419] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.654091][ T8419] device bridge_slave_0 entered promiscuous mode [ 62.662682][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.669929][ T8419] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.677687][ T8419] device bridge_slave_1 entered promiscuous mode [ 62.688768][ T8413] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.735983][ T8413] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.827313][ T8413] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.895174][ T8413] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.996358][ T8419] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.030292][ T8419] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.097657][ T8419] team0: Port device team_slave_0 added [ 63.103935][ T8415] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 63.136145][ T8415] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 63.186655][ T8415] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 63.233879][ T8415] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 63.289378][ T8419] team0: Port device team_slave_1 added [ 63.436132][ T8419] device hsr_slave_0 entered promiscuous mode [ 63.472810][ T8419] device hsr_slave_1 entered promiscuous mode [ 63.512264][ T8419] debugfs: Directory 'hsr0' with parent '/' already present! [ 63.533819][ T8424] chnl_net:caif_netlink_parms(): no params data found [ 63.547365][ T8422] chnl_net:caif_netlink_parms(): no params data found [ 63.616395][ T8426] chnl_net:caif_netlink_parms(): no params data found [ 63.667444][ T8413] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.674711][ T8426] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.681780][ T8426] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.690358][ T8426] device bridge_slave_0 entered promiscuous mode [ 63.700779][ T8426] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.708197][ T8426] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.716073][ T8426] device bridge_slave_1 entered promiscuous mode [ 63.740712][ T8422] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.748622][ T8422] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.756849][ T8422] device bridge_slave_0 entered promiscuous mode [ 63.774101][ T8419] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 63.809798][ T8424] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.817436][ T8424] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.827861][ T8424] device bridge_slave_0 entered promiscuous mode [ 63.835465][ T8422] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.845822][ T8422] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.854805][ T8422] device bridge_slave_1 entered promiscuous mode [ 63.865958][ T8426] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.877747][ T8426] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.887858][ T8419] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 63.926208][ T8419] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 63.979938][ T8424] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.988067][ T8424] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.997154][ T8424] device bridge_slave_1 entered promiscuous mode [ 64.037220][ T8426] team0: Port device team_slave_0 added [ 64.045691][ T8426] team0: Port device team_slave_1 added [ 64.053729][ T8419] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 64.097237][ T8424] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.109562][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.118997][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.141392][ T8422] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.163073][ T8415] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.173570][ T8424] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.193859][ T8413] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.204873][ T8422] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.265526][ T8426] device hsr_slave_0 entered promiscuous mode [ 64.323939][ T8426] device hsr_slave_1 entered promiscuous mode [ 64.382414][ T8426] debugfs: Directory 'hsr0' with parent '/' already present! [ 64.411234][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.421005][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.429750][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 64.438556][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.447689][ T8431] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.455128][ T8431] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.470088][ T8424] team0: Port device team_slave_0 added [ 64.496249][ T8422] team0: Port device team_slave_0 added [ 64.506484][ T8422] team0: Port device team_slave_1 added [ 64.516241][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 64.526453][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 64.536021][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.545780][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.552990][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.563571][ T8424] team0: Port device team_slave_1 added [ 64.597331][ T8415] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.620610][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 64.629775][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 64.641038][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 64.650781][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.661870][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.705135][ T8422] device hsr_slave_0 entered promiscuous mode [ 64.762845][ T8422] device hsr_slave_1 entered promiscuous mode [ 64.802329][ T8422] debugfs: Directory 'hsr0' with parent '/' already present! [ 64.875022][ T8424] device hsr_slave_0 entered promiscuous mode [ 64.942612][ T8424] device hsr_slave_1 entered promiscuous mode [ 64.982386][ T8424] debugfs: Directory 'hsr0' with parent '/' already present! [ 65.011008][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 65.019931][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 65.028977][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.036651][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.044908][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 65.056420][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.065355][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 65.074317][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.083293][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.090708][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.099206][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 65.108361][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 65.117023][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 65.137048][ T8427] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 65.146017][ T8427] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 65.175326][ T8422] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 65.227011][ T8426] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 65.294930][ T8426] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 65.354593][ T8426] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 65.394801][ T8426] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 65.437969][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.447970][ T8422] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 65.485227][ T8422] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 65.558034][ T8422] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 65.605361][ T8413] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 65.617285][ T8424] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 65.684242][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.708683][ T8419] 8021q: adding VLAN 0 to HW filter on device bond0 [ 65.720150][ T8424] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 65.763672][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 65.775247][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.783853][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 65.793092][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.801662][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 65.837900][ T8413] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 65.846942][ T8424] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 65.883593][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 65.895718][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 65.905820][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 65.914779][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 65.923485][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 65.930979][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 65.940876][ T8415] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 65.958749][ T8419] 8021q: adding VLAN 0 to HW filter on device team0 [ 65.968425][ T8424] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 66.029460][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 66.039923][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.072466][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.081508][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.090426][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.097887][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.106557][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.116096][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.125267][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.132465][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.190640][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 66.200511][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 66.209704][ T8431] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 171.192099][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 171.201994][ C1] rcu: 1-...!: (10499 ticks this GP) idle=d8e/1/0x4000000000000002 softirq=12222/12222 fqs=148 [ 171.214326][ C1] (t=10502 jiffies g=6905 q=71) [ 171.220649][ C1] rcu: rcu_preempt kthread starved for 10205 jiffies! g6905 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 171.232261][ C1] rcu: RCU grace-period kthread stack dump: [ 171.238234][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 171.246234][ C1] Call Trace: [ 171.249873][ C1] __schedule+0x9a0/0xcc0 [ 171.254316][ C1] schedule+0x181/0x210 [ 171.259183][ C1] schedule_timeout+0x14f/0x240 [ 171.264400][ C1] ? run_local_timers+0x120/0x120 [ 171.270121][ C1] rcu_gp_kthread+0xed8/0x1770 [ 171.274884][ C1] kthread+0x332/0x350 [ 171.278946][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 171.284153][ C1] ? kthread_blkcg+0xe0/0xe0 [ 171.288736][ C1] ret_from_fork+0x24/0x30 [ 171.293242][ C1] NMI backtrace for cpu 1 [ 171.297563][ C1] CPU: 1 PID: 8383 Comm: udevd Not tainted 5.4.0-syzkaller #0 [ 171.305088][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 171.315131][ C1] Call Trace: [ 171.318404][ C1] [ 171.321247][ C1] dump_stack+0x1fb/0x318 [ 171.325574][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 171.330410][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 171.337603][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 171.344978][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 171.351218][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 171.357202][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 171.362396][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 171.368630][ C1] ? trace_hardirqs_off+0x74/0x80 [ 171.374811][ C1] update_process_times+0x12d/0x180 [ 171.380384][ C1] tick_sched_timer+0x263/0x420 [ 171.385241][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 171.391028][ C1] __hrtimer_run_queues+0x403/0x840 [ 171.396336][ C1] hrtimer_interrupt+0x38c/0xda0 [ 171.401764][ C1] ? debug_smp_processor_id+0x9/0x20 [ 171.407166][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 171.412994][ C1] apic_timer_interrupt+0xf/0x20 [ 171.418011][ C1] [ 171.420951][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 171.427966][ C1] Code: 64 02 3b 00 5b 5d c3 cc 48 8b 04 24 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 b8 81 8b 7e f7 c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 <83> fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 8d 7e 01 8b 89 84 [ 171.448695][ C1] RSP: 0018:ffffc90001d97728 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 171.457459][ C1] RAX: ffffffff81487326 RBX: ffffea0002337e00 RCX: ffff8880976e0400 [ 171.465653][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002337e00 [ 171.473824][ C1] RBP: ffffc90001d97750 R08: 000000000003a768 R09: ffffed1012669717 [ 171.482833][ C1] R10: ffffed1012669717 R11: 0000000000000000 R12: ffff8880a1bb90a0 [ 171.491576][ C1] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88809334b8a8 [ 171.500002][ C1] ? mod_memcg_page_state+0x16/0x190 [ 171.505457][ C1] ? free_thread_stack+0x124/0x590 [ 171.510557][ C1] ? mod_memcg_page_state+0x16/0x190 [ 171.515849][ C1] free_thread_stack+0x168/0x590 [ 171.520969][ C1] put_task_stack+0xa3/0x130 [ 171.525551][ C1] finish_task_switch+0x3f1/0x550 [ 171.530572][ C1] __schedule+0x9a8/0xcc0 [ 171.534904][ C1] schedule+0x181/0x210 [ 171.539052][ C1] schedule_hrtimeout_range_clock+0x3c7/0x510 [ 171.545201][ C1] ? trace_hrtimer_expire_exit+0x2d0/0x2d0 [ 171.551086][ C1] schedule_hrtimeout_range+0x2a/0x40 [ 171.556549][ C1] poll_schedule_timeout+0x11c/0x1c0 [ 171.561911][ C1] do_sys_poll+0x82f/0x1240 [ 171.566720][ C1] ? debug_object_activate+0x2f7/0x6f0 [ 171.572257][ C1] ? debug_object_active_state+0x1e3/0x4a0 [ 171.578669][ C1] ? __lock_acquire+0xc75/0x1be0 [ 171.583602][ C1] ? __x32_compat_sys_ppoll_time64+0xd0/0xd0 [ 171.589577][ C1] ? trace_hardirqs_on+0x74/0x80 [ 171.594505][ C1] ? ktime_get_ts64+0x6e/0x2c0 [ 171.599262][ C1] ? ktime_get_ts64+0x6e/0x2c0 [ 171.604557][ C1] ? read_seqcount_begin+0x125/0x1c0 [ 171.609833][ C1] ? trace_hardirqs_on+0x74/0x80 [ 171.614756][ C1] ? ktime_get_ts64+0x6e/0x2c0 [ 171.619689][ C1] ? read_seqcount_begin+0x17a/0x1c0 [ 171.625121][ C1] ? ktime_get_ts64+0x236/0x2c0 [ 171.630105][ C1] ? timespec64_add_safe+0x171/0x1b0 [ 171.635513][ C1] __se_sys_poll+0x1b0/0x360 [ 171.640212][ C1] __x64_sys_poll+0x7b/0x90 [ 171.644723][ C1] do_syscall_64+0xf7/0x1c0 [ 171.649239][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 171.655123][ C1] RIP: 0033:0x7f34f1d35678 [ 171.659704][ C1] Code: 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 90 90 90 48 83 ec 28 8b 05 82 8f 2b 00 85 c0 75 17 48 63 d2 b8 07 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 48 83 c4 28 c3 89 54 24 08 48 89 74 24 10 [ 171.679566][ C1] RSP: 002b:00007ffc178cbfa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 [ 171.688754][ C1] RAX: ffffffffffffffda RBX: 20c49ba5e353f7cf RCX: 00007f34f1d35678 [ 171.697070][ C1] RDX: 000000000000ee2f RSI: 0000000000000001 RDI: 00007ffc178cc060 [ 171.705567][ C1] RBP: 0000000000000000 R08: 00007ffc178cbfb0 R09: 00007ffc1795c0b8 [ 171.713704][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000025b21d0 [ 171.722292][ C1] R13: 00000000000020f2 R14: 00007ffc178cc034 R15: 0000000002599250