[ 41.633117][ T27] audit: type=1800 audit(1575357844.833:28): pid=7986 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. [ 42.053867][ T8053] sshd (8053) used greatest stack depth: 24024 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 42.309783][ T27] audit: type=1800 audit(1575357845.603:29): pid=7986 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 42.329524][ T27] audit: type=1800 audit(1575357845.603:30): pid=7986 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. 2019/12/03 07:24:17 fuzzer started 2019/12/03 07:24:18 dialing manager at 10.128.0.26:38907 2019/12/03 07:24:18 syscalls: 2697 2019/12/03 07:24:18 code coverage: enabled 2019/12/03 07:24:18 comparison tracing: enabled 2019/12/03 07:24:18 extra coverage: extra coverage is not supported by the kernel 2019/12/03 07:24:18 setuid sandbox: enabled 2019/12/03 07:24:18 namespace sandbox: enabled 2019/12/03 07:24:18 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 07:24:18 fault injection: enabled 2019/12/03 07:24:18 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 07:24:18 net packet injection: enabled 2019/12/03 07:24:18 net device setup: enabled 2019/12/03 07:24:18 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 07:24:18 devlink PCI setup: PCI device 0000:00:10.0 is not available 07:24:19 executing program 0: r0 = creat(&(0x7f0000000080)='./file0\x00', 0x0) write$cgroup_type(r0, &(0x7f0000000100)='threaded\x00', 0xff34) fallocate(r0, 0x3, 0x0, 0x80000003) ioprio_get$uid(0x1, 0x0) 07:24:20 executing program 1: r0 = socket$nl_generic(0x10, 0x3, 0x10) r1 = syz_genetlink_get_family_id$SEG6(&(0x7f0000000100)='SEG6\x00') sendmsg$SEG6_CMD_SETHMAC(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000240)={0x2c, r1, 0x1, 0x0, 0x0, {}, [@SEG6_ATTR_SECRETLEN={0x8}, @SEG6_ATTR_ALGID={0x8}, @SEG6_ATTR_HMACKEYID={0x8}]}, 0x2c}, 0x1, 0x6c}, 0x0) syzkaller login: [ 56.825028][ T8150] IPVS: ftp: loaded support on port[0] = 21 07:24:20 executing program 2: bpf$PROG_LOAD(0x5, &(0x7f0000000200)={0xc, 0xe, &(0x7f00000005c0)=ANY=[@ANYBLOB="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"], &(0x7f0000000340)='syzkaller\x00'}, 0x48) [ 56.992121][ T8150] chnl_net:caif_netlink_parms(): no params data found [ 57.002114][ T8152] IPVS: ftp: loaded support on port[0] = 21 [ 57.098076][ T8150] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.119020][ T8150] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.139436][ T8150] device bridge_slave_0 entered promiscuous mode [ 57.156907][ T8150] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.169588][ T8150] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.177175][ T8150] device bridge_slave_1 entered promiscuous mode [ 57.208197][ T8156] IPVS: ftp: loaded support on port[0] = 21 [ 57.227488][ T8150] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.265600][ T8150] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link 07:24:20 executing program 3: write$P9_RXATTRCREATE(0xffffffffffffffff, &(0x7f0000000040)={0x3ba}, 0x7) r0 = openat$sequencer(0xffffffffffffff9c, &(0x7f00000019c0)='/dev/sequencer\x00', 0x1, 0x0) write$sndseq(r0, &(0x7f0000000040)=[{0x0, 0x0, 0x0, 0x0, @tick=0x4, {}, {}, @quote}], 0xff33) write$sndseq(r0, &(0x7f0000000040)=[{0xffffff81, 0x3, 0x0, 0x0, @tick, {}, {}, @quote}], 0x30) [ 57.322312][ T8152] chnl_net:caif_netlink_parms(): no params data found [ 57.341982][ T8150] team0: Port device team_slave_0 added [ 57.350205][ T8150] team0: Port device team_slave_1 added [ 57.464031][ T8150] device hsr_slave_0 entered promiscuous mode 07:24:20 executing program 4: r0 = socket$kcm(0x2b, 0x1, 0x0) sendmsg$kcm(r0, &(0x7f0000000640)={&(0x7f0000000000)=@nl=@unspec, 0x80, 0x0}, 0x20000000) [ 57.549064][ T8150] device hsr_slave_1 entered promiscuous mode [ 57.596480][ T8152] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.618832][ T8152] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.627248][ T8152] device bridge_slave_0 entered promiscuous mode [ 57.687921][ T8160] IPVS: ftp: loaded support on port[0] = 21 [ 57.694063][ T8152] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.702413][ T8152] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.719283][ T8152] device bridge_slave_1 entered promiscuous mode [ 57.773787][ T8164] IPVS: ftp: loaded support on port[0] = 21 [ 57.786656][ T8156] chnl_net:caif_netlink_parms(): no params data found [ 57.804835][ T8152] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link 07:24:21 executing program 5: r0 = socket$inet_udplite(0x2, 0x2, 0x88) ioctl(r0, 0x1000008912, &(0x7f00000000c0)="0800b5055e0bcfe87b0071") r1 = socket$alg(0x26, 0x5, 0x0) bind$alg(r1, &(0x7f00000001c0)={0x26, 'hash\x00', 0x0, 0x0, 'xxhash64\x00'}, 0x58) r2 = accept(r1, 0x0, 0x0) sendmmsg$inet6(r2, &(0x7f0000007240)=[{{0x0, 0x0, &(0x7f0000001580)=[{&(0x7f0000000280)="e51d0f32652d5ff4f8d8b2152a5d9c983b0f6dece8aec0be26ebd898", 0x1c}, {&(0x7f0000001380)="880134166044913e912b016e15f9cb2c942396cab4788b37", 0x18}], 0x2}}, {{0x0, 0x0, &(0x7f00000016c0)=[{&(0x7f0000001640)=';', 0x1}], 0x1, &(0x7f0000001700)=[@flowinfo={{0x14}}, @hoplimit={{0x14}}], 0x30}}], 0x2, 0x0) [ 57.837089][ T8150] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 57.933996][ T8150] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 57.980877][ T8152] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.013847][ T8150] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.074556][ T8152] team0: Port device team_slave_0 added [ 58.102505][ T8150] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.165014][ T8152] team0: Port device team_slave_1 added [ 58.171778][ T8156] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.179284][ T8156] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.187040][ T8156] device bridge_slave_0 entered promiscuous mode [ 58.196102][ T8156] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.203258][ T8156] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.211479][ T8156] device bridge_slave_1 entered promiscuous mode [ 58.236955][ T8166] IPVS: ftp: loaded support on port[0] = 21 [ 58.258429][ T8156] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.332118][ T8152] device hsr_slave_0 entered promiscuous mode [ 58.379352][ T8152] device hsr_slave_1 entered promiscuous mode [ 58.429074][ T8152] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.439449][ T8156] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.505333][ T8156] team0: Port device team_slave_0 added [ 58.517516][ T8156] team0: Port device team_slave_1 added [ 58.552529][ T8160] chnl_net:caif_netlink_parms(): no params data found [ 58.588491][ T8164] chnl_net:caif_netlink_parms(): no params data found [ 58.641878][ T8152] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 58.724235][ T8152] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 58.901489][ T8156] device hsr_slave_0 entered promiscuous mode [ 58.959817][ T8156] device hsr_slave_1 entered promiscuous mode [ 59.018850][ T8156] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.031084][ T8152] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 59.083360][ T8152] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 59.146136][ T8160] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.154022][ T8160] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.162142][ T8160] device bridge_slave_0 entered promiscuous mode [ 59.174646][ T8166] chnl_net:caif_netlink_parms(): no params data found [ 59.190417][ T8164] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.201052][ T8164] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.208638][ T8164] device bridge_slave_0 entered promiscuous mode [ 59.220859][ T8160] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.227925][ T8160] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.235889][ T8160] device bridge_slave_1 entered promiscuous mode [ 59.259333][ T8164] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.266410][ T8164] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.274584][ T8164] device bridge_slave_1 entered promiscuous mode [ 59.308381][ T8160] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.333682][ T8164] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.347456][ T8160] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.367381][ T8160] team0: Port device team_slave_0 added [ 59.378050][ T8160] team0: Port device team_slave_1 added [ 59.391531][ T8150] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.398398][ T8156] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 59.431435][ T8164] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.449514][ T8166] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.456588][ T8166] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.464895][ T8166] device bridge_slave_0 entered promiscuous mode [ 59.485372][ T8156] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 59.545397][ T8156] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 59.600864][ T8156] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 59.651602][ T8166] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.660489][ T8166] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.668168][ T8166] device bridge_slave_1 entered promiscuous mode [ 59.711363][ T8160] device hsr_slave_0 entered promiscuous mode [ 59.749133][ T8160] device hsr_slave_1 entered promiscuous mode [ 59.808926][ T8160] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.824859][ T8164] team0: Port device team_slave_0 added [ 59.835525][ T8164] team0: Port device team_slave_1 added [ 59.861035][ T8166] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.932156][ T8164] device hsr_slave_0 entered promiscuous mode [ 59.979118][ T8164] device hsr_slave_1 entered promiscuous mode [ 60.038904][ T8164] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.054250][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.062386][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.075345][ T8166] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.114463][ T8150] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.127628][ T8152] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.140034][ T8166] team0: Port device team_slave_0 added [ 60.145930][ T8160] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 60.216514][ T8160] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 60.283411][ T8160] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 60.341750][ T8166] team0: Port device team_slave_1 added [ 60.349714][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.358330][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.367681][ T8157] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.375032][ T8157] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.383963][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.394086][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.402745][ T8157] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.409872][ T8157] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.417391][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.425192][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.433008][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.454748][ T8152] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.466342][ T8160] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 60.553368][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 60.561500][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.582167][ T8164] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 60.650695][ T8164] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 60.751459][ T8166] device hsr_slave_0 entered promiscuous mode [ 60.789904][ T8166] device hsr_slave_1 entered promiscuous mode [ 60.848836][ T8166] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.860846][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.870559][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.879708][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.888277][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.898983][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.907339][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.916361][ T8164] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 60.951161][ T8164] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 61.006125][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.014487][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.023036][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.031939][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.040958][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.050982][ T8157] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.058220][ T8157] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.066711][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.075677][ T8150] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.108096][ T8155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.117317][ T8155] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.125899][ T8155] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.132997][ T8155] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.140892][ T8155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.159806][ T8156] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.187308][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.195331][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.203183][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 61.211230][ T8157] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 61.220223][ T8156] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.227580][ T8166] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 61.284322][ T8150] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.293672][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.303598][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.313405][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.322053][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.331005][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.340230][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.348230][ T8166] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 61.433390][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.442812][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.451746][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.462813][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.471412][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.480169][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.488411][ T1091] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.495513][ T1091] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.503720][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.512871][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.521560][ T1091] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.528766][ T1091] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.536435][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.545483][ T1091] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.554610][ T8166] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 61.624620][ T8166] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 61.681654][ T8152] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.695338][ T8171] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.706977][ T8164] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.745094][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.760643][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 166.778669][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 166.785441][ C0] rcu: 0-...!: (10499 ticks this GP) idle=832/1/0x4000000000000002 softirq=10732/10732 fqs=0 [ 166.795923][ C0] (t=10501 jiffies g=6301 q=51) [ 166.800849][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g6301 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 166.813145][ C0] rcu: RCU grace-period kthread stack dump: [ 166.819567][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 166.827540][ C0] Call Trace: [ 166.830826][ C0] __schedule+0x9a0/0xcc0 [ 166.835151][ C0] schedule+0x181/0x210 [ 166.839300][ C0] schedule_timeout+0x14f/0x240 [ 166.844149][ C0] ? run_local_timers+0x120/0x120 [ 166.849171][ C0] rcu_gp_kthread+0xed8/0x1770 [ 166.853960][ C0] kthread+0x332/0x350 [ 166.858012][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 166.863109][ C0] ? kthread_blkcg+0xe0/0xe0 [ 166.867716][ C0] ret_from_fork+0x24/0x30 [ 166.872141][ C0] NMI backtrace for cpu 0 [ 166.876483][ C0] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.4.0-syzkaller #0 [ 166.884186][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.894246][ C0] Workqueue: events linkwatch_event [ 166.899433][ C0] Call Trace: [ 166.902704][ C0] [ 166.905547][ C0] dump_stack+0x1fb/0x318 [ 166.909882][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 166.914721][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 166.920862][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 166.926914][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 166.932881][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 166.938782][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 166.943884][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 166.949073][ C0] ? trace_hardirqs_off+0x74/0x80 [ 166.954088][ C0] update_process_times+0x12d/0x180 [ 166.959274][ C0] tick_sched_timer+0x263/0x420 [ 166.964110][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.969647][ C0] __hrtimer_run_queues+0x403/0x840 [ 166.974848][ C0] hrtimer_interrupt+0x38c/0xda0 [ 166.979788][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.985098][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 166.990633][ C0] apic_timer_interrupt+0xf/0x20 [ 166.995592][ C0] [ 166.998527][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 [ 167.004664][ C0] Code: cc 07 48 89 de e8 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 [ 167.024339][ C0] RSP: 0018:ffffc90000cbf620 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 167.032737][ C0] RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff8880a9d9a140 [ 167.040694][ C0] RDX: 0000000000000001 RSI: 00000000fffffffc RDI: ffffea0002a5a040 [ 167.048655][ C0] RBP: ffffc90000cbf648 R08: dffffc0000000000 R09: fffffbfff120248a [ 167.056611][ C0] R10: fffffbfff120248a R11: 0000000000000000 R12: dffffc0000000000 [ 167.064572][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880920ff9e8 [ 167.072542][ C0] ? mod_memcg_page_state+0x123/0x190 [ 167.077904][ C0] ? mod_memcg_page_state+0x123/0x190 [ 167.083262][ C0] free_thread_stack+0x168/0x590 [ 167.088201][ C0] put_task_stack+0xa3/0x130 [ 167.092777][ C0] finish_task_switch+0x3f1/0x550 [ 167.097790][ C0] __schedule+0x9a8/0xcc0 [ 167.102115][ C0] preempt_schedule_irq+0xc1/0x140 [ 167.107214][ C0] retint_kernel+0x1b/0x2b [ 167.111616][ C0] RIP: 0010:ip6_route_add+0x10/0x130 [ 167.116890][ C0] Code: 83 43 89 e8 82 61 cb fa e9 5a fe ff 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 49 89 d6 <89> f3 49 89 ff e8 76 ea 8f fa 4c 89 ff 89 de 4c 89 f2 e8 09 01 00 [ 167.141119][ C0] RSP: 0018:ffffc90000cbf8a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 167.149526][ C0] RAX: 1ffff92000197f20 RBX: ffff88808d4f80c0 RCX: 0000000000000000 [ 167.157485][ C0] RDX: 0000000000000000 RSI: 0000000000000cc0 RDI: ffffc90000cbf8d8 [ 167.165455][ C0] RBP: ffffc90000cbf8c8 R08: ffffffff86e3fe69 R09: fffffbfff1287025 [ 167.173411][ C0] R10: fffffbfff1287025 R11: 0000000000000000 R12: ffffc90000cbf968 [ 167.181369][ C0] R13: ffff88806cb06000 R14: 0000000000000000 R15: dffffc0000000000 [ 167.189342][ C0] ? addrconf_add_dev+0x239/0x540 [ 167.194364][ C0] addrconf_add_dev+0x3c8/0x540 [ 167.199223][ C0] addrconf_dev_config+0x114/0x280 [ 167.204460][ C0] addrconf_notify+0xc8d/0x3c90 [ 167.209331][ C0] ? lockdep_hardirqs_on+0x3c5/0x7d0 [ 167.214614][ C0] ? __local_bh_enable_ip+0x13a/0x240 [ 167.219996][ C0] ? clusterip_netdev_event+0x48b/0x4a0 [ 167.225557][ C0] ? trace_hardirqs_on+0x74/0x80 [ 167.230492][ C0] ? __local_bh_enable_ip+0x13a/0x240 [ 167.235856][ C0] ? clusterip_netdev_event+0x48b/0x4a0 [ 167.241386][ C0] ? tls_dev_event+0x619/0xc00 [ 167.246136][ C0] ? clusterip_netdev_event+0x48b/0x4a0 [ 167.251668][ C0] ? ip6mr_device_event+0x1ee/0x210 [ 167.256855][ C0] raw_notifier_call_chain+0xec/0x190 [ 167.262225][ C0] netdev_state_change+0x147/0x1f0 [ 167.267324][ C0] linkwatch_do_dev+0x10e/0x160 [ 167.272161][ C0] __linkwatch_run_queue+0x446/0x730 [ 167.277437][ C0] linkwatch_event+0x4c/0x60 [ 167.282017][ C0] process_one_work+0x7ef/0x10d0 [ 167.286957][ C0] worker_thread+0xc01/0x1630 [ 167.291642][ C0] kthread+0x332/0x350 [ 167.295693][ C0] ? rcu_lock_release+0x30/0x30 [ 167.300530][ C0] ? kthread_blkcg+0xe0/0xe0 [ 167.305193][ C0] ret_from_fork+0x24/0x30