[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 47.390543][ T25] audit: type=1800 audit(1575439678.512:25): pid=8254 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 47.419305][ T25] audit: type=1800 audit(1575439678.512:26): pid=8254 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 47.445173][ T25] audit: type=1800 audit(1575439678.512:27): pid=8254 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 '10.128.15.199' (ECDSA) to the list of known hosts. 2019/12/04 06:08:07 fuzzer started 2019/12/04 06:08:09 dialing manager at 10.128.0.26:42111 2019/12/04 06:08:09 syscalls: 2689 2019/12/04 06:08:09 code coverage: enabled 2019/12/04 06:08:09 comparison tracing: enabled 2019/12/04 06:08:09 extra coverage: extra coverage is not supported by the kernel 2019/12/04 06:08:09 setuid sandbox: enabled 2019/12/04 06:08:09 namespace sandbox: enabled 2019/12/04 06:08:09 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 06:08:09 fault injection: enabled 2019/12/04 06:08:09 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 06:08:09 net packet injection: enabled 2019/12/04 06:08:09 net device setup: enabled 2019/12/04 06:08:09 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 06:08:09 devlink PCI setup: PCI device 0000:00:10.0 is not available 06:08:10 executing program 0: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000200)='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_ENABLE_CAP_CPU(r2, 0xc008ae88, &(0x7f00000000c0)={0x7a, 0x4, [0x0, 0x0, 0x48b], [0x3a]}) 06:08:10 executing program 1: bpf$BPF_BTF_LOAD(0x12, &(0x7f0000004700)={&(0x7f0000000080)=ANY=[@ANYBLOB="9feb01001800000000000000300000003000000007000000000000000000000a02000000000000000000000d010000000000000001000004000000020400000002000000ffffff0000300000615f00"], &(0x7f0000004600)=""/210, 0x4f, 0x193, 0x1}, 0x20) syzkaller login: [ 59.268760][ T8419] IPVS: ftp: loaded support on port[0] = 21 [ 59.450930][ T8419] chnl_net:caif_netlink_parms(): no params data found [ 59.496724][ T8419] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.505623][ T8419] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.529590][ T8419] device bridge_slave_0 entered promiscuous mode 06:08:10 executing program 2: ioctl$RTC_SET_TIME(0xffffffffffffffff, 0x4024700a, &(0x7f0000000000)={0x39, 0x4023, 0x11}) r0 = syz_open_dev$dri(&(0x7f00000002c0)='/dev/dri/card#\x00', 0x0, 0x0) ioctl(r0, 0xffffffffffffffb2, &(0x7f0000000000)) [ 59.546874][ T8422] IPVS: ftp: loaded support on port[0] = 21 [ 59.554191][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.561423][ T8419] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.574274][ T8419] device bridge_slave_1 entered promiscuous mode [ 59.644238][ T8419] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.676416][ T8419] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.722721][ T8419] team0: Port device team_slave_0 added [ 59.744444][ T8419] team0: Port device team_slave_1 added 06:08:11 executing program 3: r0 = syz_init_net_socket$nfc_llcp(0x27, 0x1, 0x1) bind$nfc_llcp(r0, &(0x7f0000000100)={0x27, 0x0, 0x0, 0x0, 0x0, 0x0, "8811e78754a539d39c2bd6a40fa8c8aa024d86cdc834bc921c0525fec2541e21ccf67e1d7b55cabe9e068dd58ce565aa9a9d325ebac7627ffe7a54cdbd77b3", 0x2b}, 0x60) listen(r0, 0x0) ppoll(&(0x7f0000000040)=[{r0}], 0x1, &(0x7f0000000080)={0x0, 0x1c9c380}, 0x0, 0x0) [ 59.822301][ T8419] device hsr_slave_0 entered promiscuous mode [ 59.859897][ T8419] device hsr_slave_1 entered promiscuous mode [ 59.935784][ T8424] IPVS: ftp: loaded support on port[0] = 21 [ 59.947659][ T8422] chnl_net:caif_netlink_parms(): no params data found [ 60.074920][ T8419] netdevsim netdevsim0 netdevsim0: renamed from eth0 06:08:11 executing program 4: pipe(0x0) write$binfmt_script(0xffffffffffffffff, 0x0, 0x0) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000040)={0xffffffffffffffff, 0xffffffffffffffff}) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) r2 = socket$netlink(0x10, 0x3, 0x8000000004) writev(r2, &(0x7f00000000c0)=[{&(0x7f0000000300)="580000001400192340834b80040d8c560a067fbc45ff810500000000000058000b480400945f64009400050028925a01000000000000008000f0fffeffe809000000fff5dd0000001000010002081000418e00000004fcff", 0x58}], 0x1) recvmsg(r2, &(0x7f0000000080)={0x0, 0x0, 0x0}, 0x0) [ 60.145651][ T8422] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.155506][ T8422] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.164195][ T8422] device bridge_slave_0 entered promiscuous mode [ 60.177551][ T8422] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.185146][ T8422] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.196534][ T8422] device bridge_slave_1 entered promiscuous mode [ 60.205780][ T8419] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.273796][ T8419] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.284228][ T8427] IPVS: ftp: loaded support on port[0] = 21 [ 60.334742][ T8419] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 60.434320][ T8422] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.452618][ T8422] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link 06:08:11 executing program 5: r0 = socket$inet6(0xa, 0x3, 0x5) ioctl(r0, 0x1000008912, &(0x7f0000000000)="0815b5055e0bcfe87b3071") r1 = socket$alg(0x26, 0x5, 0x0) bind$alg(r1, &(0x7f0000000080)={0x26, 'hash\x00', 0x0, 0x0, 'poly1305-generic\x00'}, 0x58) r2 = accept(r1, 0x0, 0x0) sendto$x25(r2, &(0x7f0000000000)="df49f9d49c7f4c52fd992df3fbce33e816afeaaf4017327c", 0xfffffffffffffdcb, 0x8000, 0x0, 0xfffffffffffffcf2) [ 60.481944][ T8430] IPVS: ftp: loaded support on port[0] = 21 [ 60.562452][ T8422] team0: Port device team_slave_0 added [ 60.576481][ T8424] chnl_net:caif_netlink_parms(): no params data found [ 60.599187][ T8422] team0: Port device team_slave_1 added [ 60.687542][ T8433] IPVS: ftp: loaded support on port[0] = 21 [ 60.741299][ T8422] device hsr_slave_0 entered promiscuous mode [ 60.789876][ T8422] device hsr_slave_1 entered promiscuous mode [ 60.849535][ T8422] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.866504][ T8424] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.874556][ T8424] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.882625][ T8424] device bridge_slave_0 entered promiscuous mode [ 60.893263][ T8424] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.900512][ T8424] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.908788][ T8424] device bridge_slave_1 entered promiscuous mode [ 61.007746][ T8427] chnl_net:caif_netlink_parms(): no params data found [ 61.027723][ T8424] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.037376][ T8422] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 61.093053][ T8422] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 61.144376][ T8422] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 61.192338][ T8422] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 61.271410][ T8424] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.320767][ T8424] team0: Port device team_slave_0 added [ 61.337973][ T8427] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.346200][ T8427] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.354276][ T8427] device bridge_slave_0 entered promiscuous mode [ 61.366954][ T8430] chnl_net:caif_netlink_parms(): no params data found [ 61.380028][ T8424] team0: Port device team_slave_1 added [ 61.397066][ T8427] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.406150][ T8427] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.414099][ T8427] device bridge_slave_1 entered promiscuous mode [ 61.440392][ T8427] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.492151][ T8424] device hsr_slave_0 entered promiscuous mode [ 61.529797][ T8424] device hsr_slave_1 entered promiscuous mode [ 61.569617][ T8424] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.578771][ T8427] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.607226][ T8419] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.688615][ T8430] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.696000][ T8430] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.703858][ T8430] device bridge_slave_0 entered promiscuous mode [ 61.712946][ T8430] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.720082][ T8430] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.727829][ T8430] device bridge_slave_1 entered promiscuous mode [ 61.738012][ T8424] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 61.794617][ T8424] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 61.852829][ T8427] team0: Port device team_slave_0 added [ 61.858709][ T8424] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 61.909066][ T8419] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.921763][ T8433] chnl_net:caif_netlink_parms(): no params data found [ 61.932377][ T8427] team0: Port device team_slave_1 added [ 61.938614][ T8424] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 62.002411][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 62.012122][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.054672][ T8430] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.071554][ T8430] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.083367][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 62.092633][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.101395][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.108606][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.116902][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 62.126646][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.135182][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.142276][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.159098][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 62.222457][ T8427] device hsr_slave_0 entered promiscuous mode [ 62.259767][ T8427] device hsr_slave_1 entered promiscuous mode [ 62.309590][ T8427] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.321037][ T8433] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.328118][ T8433] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.336249][ T8433] device bridge_slave_0 entered promiscuous mode [ 62.344995][ T8433] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.352172][ T8433] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.360223][ T8433] device bridge_slave_1 entered promiscuous mode [ 62.367540][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 62.384723][ T8430] team0: Port device team_slave_0 added [ 62.405474][ T8430] team0: Port device team_slave_1 added [ 62.425370][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 62.462672][ T8433] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.475180][ T8433] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.490497][ T8422] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.504777][ T8427] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 62.582392][ T8430] device hsr_slave_0 entered promiscuous mode [ 62.610147][ T8430] device hsr_slave_1 entered promiscuous mode [ 62.649433][ T8430] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.668914][ T8433] team0: Port device team_slave_0 added [ 62.680479][ T8427] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 62.722564][ T8427] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 62.782518][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 62.791454][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.800535][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 62.809528][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.818735][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.829474][ T8433] team0: Port device team_slave_1 added [ 62.891324][ T8433] device hsr_slave_0 entered promiscuous mode [ 62.942470][ T8433] device hsr_slave_1 entered promiscuous mode [ 62.969386][ T8433] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.979814][ T8427] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 63.027605][ T8424] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.037503][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 63.046304][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.054904][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 63.064356][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 63.095264][ T8422] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.106232][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 63.115535][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 63.149626][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 63.157436][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.168437][ T8419] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 63.183904][ T8430] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 63.234803][ T8424] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.241931][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 63.252389][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.260942][ T3000] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.268177][ T3000] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.276731][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 63.285388][ T8433] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 63.332007][ T8433] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 63.367498][ T8433] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 63.422782][ T8430] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 63.502539][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 63.511652][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 63.521178][ T2716] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.528272][ T2716] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.535965][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 63.545374][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 63.554524][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.562949][ T2716] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.570200][ T2716] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.577969][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 63.586856][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 63.595497][ T2716] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.602640][ T2716] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.610356][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 63.619690][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 63.632802][ T8433] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 63.680981][ T8430] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 63.749467][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 63.758243][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 63.770473][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 63.778125][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 63.789105][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 63.798776][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 63.807480][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 63.816366][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 63.825169][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 63.833755][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 63.843665][ T3000] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 63.856502][ T8430] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 63.935618][ T8419] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 63.955094][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 63.964180][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 63.992234][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.000264][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 64.009063][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.017914][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 64.026781][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.058485][ T8427] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.067998][ T8424] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.090673][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 64.103706][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.164579][ T8422] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.176841][ T8422] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.199966][ T8440] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 169.219213][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 169.227586][ C0] rcu: 0-....: (10500 ticks this GP) idle=7b6/1/0x4000000000000002 softirq=11436/11436 fqs=5249 [ 169.243151][ C0] (t=10502 jiffies g=6953 q=286) [ 169.249462][ C0] NMI backtrace for cpu 0 [ 169.254790][ C0] CPU: 0 PID: 8422 Comm: syz-executor.1 Not tainted 5.4.0-syzkaller #0 [ 169.265413][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 169.280354][ C0] Call Trace: [ 169.285567][ C0] [ 169.290599][ C0] dump_stack+0x1fb/0x318 [ 169.296998][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 169.304179][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 169.311673][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 169.318350][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 169.325007][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 169.331519][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 169.336882][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 169.342927][ C0] ? trace_hardirqs_off+0x74/0x80 [ 169.349060][ C0] update_process_times+0x12d/0x180 [ 169.355434][ C0] tick_sched_timer+0x263/0x420 [ 169.360884][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 169.367747][ C0] __hrtimer_run_queues+0x403/0x840 [ 169.373240][ C0] hrtimer_interrupt+0x38c/0xda0 [ 169.378587][ C0] ? debug_smp_processor_id+0x9/0x20 [ 169.384392][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 169.390819][ C0] apic_timer_interrupt+0xf/0x20 [ 169.398662][ C0] [ 169.401605][ C0] RIP: 0010:__memcg_kmem_uncharge+0x6/0x2e0 [ 169.408256][ C0] Code: ce 8c 07 00 74 12 48 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 [ 169.429892][ C0] RSP: 0018:ffffc90001f97040 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 169.439260][ C0] RAX: ffffffff81486ea4 RBX: ffffea0002583cc0 RCX: ffff8880a24b2240 [ 169.448611][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002583cc0 [ 169.457709][ C0] RBP: ffffc90001f97048 R08: 000000000003a768 R09: ffffed1012c6e287 [ 169.467303][ C0] R10: ffffed1012c6e287 R11: 0000000000000000 R12: ffff88808ba0a1a0 [ 169.475899][ C0] R13: dffffc0000000000 R14: 1ffff11011741434 R15: ffff888096371428 [ 169.485882][ C0] ? free_thread_stack+0x124/0x590 [ 169.491834][ C0] free_thread_stack+0x12e/0x590 [ 169.498176][ C0] put_task_stack+0xa3/0x130 [ 169.503210][ C0] finish_task_switch+0x3f1/0x550 [ 169.509204][ C0] __schedule+0x9a8/0xcc0 [ 169.513788][ C0] ? ___preempt_schedule+0x16/0x18 [ 169.519686][ C0] preempt_schedule+0xdb/0x120 [ 169.526106][ C0] ? __dev_change_flags+0x165/0x680 [ 169.533232][ C0] ___preempt_schedule+0x16/0x18 [ 169.538993][ C0] ? mark_lock+0x107/0x1650 [ 169.544681][ C0] __local_bh_enable_ip+0x17d/0x240 [ 169.550977][ C0] ? __dev_change_flags+0x165/0x680 [ 169.557938][ C0] _raw_spin_unlock_bh+0x2f/0x40 [ 169.563175][ C0] __dev_change_flags+0x165/0x680 [ 169.568901][ C0] ? do_syscall_64+0xf7/0x1c0 [ 169.574162][ C0] dev_change_flags+0x8a/0x190 [ 169.582022][ C0] do_setlink+0xb2e/0x3960 [ 169.588548][ C0] ? memset+0x31/0x40 [ 169.594032][ C0] ? __nla_validate_parse+0x18cd/0x1f40 [ 169.603324][ C0] ? __kasan_check_read+0x11/0x20 [ 169.612414][ C0] rtnl_newlink+0x14dd/0x1bd0 [ 169.619257][ C0] ? rtnl_newlink+0x371/0x1bd0 [ 169.628481][ C0] ? rcu_lock_release+0x21/0x30 [ 169.635863][ C0] ? __mutex_lock_common+0x4f5/0x2e10 [ 169.647030][ C0] ? rtnetlink_rcv_msg+0x83c/0xd40 [ 169.656957][ C0] ? rcu_lock_release+0x9/0x30 [ 169.664543][ C0] ? rtnl_setlink+0x490/0x490 [ 169.676148][ C0] rtnetlink_rcv_msg+0x889/0xd40 [ 169.684591][ C0] ? __local_bh_enable_ip+0x13a/0x240 [ 169.696436][ C0] ? local_bh_enable+0x9/0x30 [ 169.705246][ C0] ? trace_hardirqs_on+0x74/0x80 [ 169.713953][ C0] ? __local_bh_enable_ip+0x13a/0x240 [ 169.723019][ C0] ? local_bh_enable+0x1f/0x30 [ 169.729657][ C0] ? rcu_lock_release+0x9/0x30 [ 169.739050][ C0] ? rcu_lock_release+0x9/0x30 [ 169.750305][ C0] netlink_rcv_skb+0x19e/0x3d0 [ 169.762816][ C0] ? rtnetlink_bind+0x80/0x80 [ 169.769744][ C0] rtnetlink_rcv+0x1c/0x20 [ 169.777994][ C0] netlink_unicast+0x767/0x920 [ 169.783292][ C0] netlink_sendmsg+0xa21/0xd40 [ 169.788257][ C0] ? netlink_getsockopt+0x9f0/0x9f0 [ 169.793849][ C0] __sys_sendto+0x442/0x5e0 [ 169.798942][ C0] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 169.805496][ C0] ? prepare_exit_to_usermode+0x221/0x5b0 [ 169.812557][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 169.821011][ C0] __x64_sys_sendto+0xe5/0x100 [ 169.827246][ C0] do_syscall_64+0xf7/0x1c0 [ 169.833325][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 169.842483][ C0] RIP: 0033:0x414373 [ 169.848324][ C0] Code: ff 0f 83 b0 19 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d fd 40 66 00 00 75 17 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 81 19 00 00 c3 48 83 ec 08 e8 87 fa ff ff [ 169.878529][ C0] RSP: 002b:00007fffa2536498 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 169.889547][ C0] RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414373 [ 169.899667][ C0] RDX: 0000000000000020 RSI: 0000000000a72250 RDI: 0000000000000003 [ 169.910234][ C0] RBP: 0000000000000000 R08: 00007fffa25364a0 R09: 000000000000000c [ 169.918467][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 169.930330][ C0] R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003