[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 45.711173][ T27] audit: type=1800 audit(1578449764.815:25): pid=8231 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 45.730157][ T27] audit: type=1800 audit(1578449764.825:26): pid=8231 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 45.775947][ T27] audit: type=1800 audit(1578449764.825:27): pid=8231 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 '10.128.0.226' (ECDSA) to the list of known hosts. 2020/01/08 02:16:16 fuzzer started 2020/01/08 02:16:17 dialing manager at 10.128.0.26:35703 2020/01/08 02:16:17 syscalls: 2824 2020/01/08 02:16:17 code coverage: enabled 2020/01/08 02:16:17 comparison tracing: enabled 2020/01/08 02:16:17 extra coverage: enabled 2020/01/08 02:16:17 setuid sandbox: enabled 2020/01/08 02:16:17 namespace sandbox: enabled 2020/01/08 02:16:17 Android sandbox: /sys/fs/selinux/policy does not exist 2020/01/08 02:16:17 fault injection: enabled 2020/01/08 02:16:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/01/08 02:16:17 net packet injection: enabled 2020/01/08 02:16:17 net device setup: enabled 2020/01/08 02:16:17 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2020/01/08 02:16:17 devlink PCI setup: PCI device 0000:00:10.0 is not available 02:16:18 executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$nl_netfilter(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000bfdfdc)={0x18, 0x0, 0x10000001, 0x800000001, 0x0, 0x0, {}, [@nested={0x4, 0x1}]}, 0x18}}, 0x0) 02:16:19 executing program 1: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3, 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}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r0 = socket(0x1e, 0x1, 0x0) sendmsg(r0, &(0x7f0000000000)={&(0x7f0000000080)=@generic={0x10000000001e, "02ff0100000001000000000000000ae77f5bf86c48020002000000f1ffffff009a480075e6a50000de010300000000e4ff064b3f013a000000080000008f00000000ac50d5fe32c4000000007fffffff6a008356edb9a6341c1fd45624281e00070ecddd0206c39750c40000fd00000900000000000b0000db000004da36"}, 0x80, 0x0}, 0x0) sendmmsg$unix(r0, &(0x7f0000003f40), 0x4924924924925ce, 0x0) write$binfmt_elf32(r0, &(0x7f0000000340)={{0x7f, 0x45, 0x4c, 0x46, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x38}, [{0x0, 0x0, 0x0, 0x0, 0x0, 0xfffffe00}]}, 0x58) syzkaller login: [ 60.009905][ T8398] IPVS: ftp: loaded support on port[0] = 21 [ 60.162680][ T8398] chnl_net:caif_netlink_parms(): no params data found [ 60.207507][ T8398] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.216894][ T8398] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.226152][ T8398] device bridge_slave_0 entered promiscuous mode [ 60.236088][ T8398] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.244107][ T8398] bridge0: port 2(bridge_slave_1) entered disabled state 02:16:19 executing program 2: r0 = socket$kcm(0x2b, 0x1, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r0, 0x8912, 0x400200) syz_mount_image$jfs(&(0x7f0000000040)='jfs\x00', &(0x7f0000000080)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f00000004c0)={[{@quota='quota'}, {@errors_remount='errors=remount-ro'}], [{@subj_type={'subj_type'}}]}) [ 60.253062][ T8398] device bridge_slave_1 entered promiscuous mode [ 60.268112][ T8401] IPVS: ftp: loaded support on port[0] = 21 [ 60.297863][ T8398] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.323867][ T8398] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.374996][ T8398] team0: Port device team_slave_0 added [ 60.392052][ T8398] team0: Port device team_slave_1 added 02:16:19 executing program 3: r0 = socket(0x11, 0x800000003, 0x0) setsockopt$packet_buf(r0, 0x107, 0xf, &(0x7f00000001c0)="a2e6999b", 0x4) bind(r0, &(0x7f0000000080)=@generic={0x11, "0000010000000000080044944eeba71a4976e252922cb18f6e2e2aba000000012e0b3836005404b0e0301a4ce875f2e3ff5f163ee340b7679500800000000000000101013c5811039e15775027ecce66fd792bbf0e5bf5ff1b0816f3f6db1c00010000000000000049740000000000000006ad8e5ecc326d3a09ffc2c654"}, 0x80) write$binfmt_aout(r0, &(0x7f0000001440)={{0x108, 0x0, 0x0, 0x24a, 0x0, 0x0, 0x0, 0x0, 0x5}, "e606b1c2062a6d0000233b265b4232d0699d16cf07f7e31ebd07e3a90a82d307"}, 0xfdef) [ 60.543870][ T8398] device hsr_slave_0 entered promiscuous mode [ 60.602559][ T8398] device hsr_slave_1 entered promiscuous mode 02:16:19 executing program 4: r0 = socket$inet6(0xa, 0x3, 0x6b) ioctl(r0, 0x1000008912, &(0x7f0000000000)="0815b5055e0bcfe87b3071") unshare(0x0) r1 = socket(0x2, 0x2, 0x0) r2 = inotify_init() fstat(r1, &(0x7f00000001c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0}) fchown(r2, 0x0, r3) [ 60.758539][ T8406] IPVS: ftp: loaded support on port[0] = 21 [ 60.768698][ T8401] chnl_net:caif_netlink_parms(): no params data found [ 60.789524][ T8404] IPVS: ftp: loaded support on port[0] = 21 [ 60.897769][ T8401] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.923066][ T8401] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.931337][ T8401] device bridge_slave_0 entered promiscuous mode 02:16:20 executing program 5: r0 = socket$kcm(0x10, 0x2, 0x0) sendmsg$kcm(r0, &(0x7f00000003c0)={0x0, 0x0, &(0x7f0000000080)=[{&(0x7f0000000040)="2e0000001c008105e00f80ecdb4cb9f207c804a01c0000003f0006000a0002000a0ada1b40d805000500c50083b8", 0x2e}], 0x1}, 0x0) [ 60.988250][ T8401] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.999806][ T8401] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.009916][ T8401] device bridge_slave_1 entered promiscuous mode [ 61.026913][ T8408] IPVS: ftp: loaded support on port[0] = 21 [ 61.080939][ T8398] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 61.134752][ T8401] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.145348][ T8398] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 61.194141][ T8398] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 61.283499][ T8398] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 61.328614][ T8401] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.383470][ T8401] team0: Port device team_slave_0 added [ 61.413110][ T8401] team0: Port device team_slave_1 added [ 61.418910][ T8410] IPVS: ftp: loaded support on port[0] = 21 [ 61.425176][ T8406] chnl_net:caif_netlink_parms(): no params data found [ 61.493183][ T8401] device hsr_slave_0 entered promiscuous mode [ 61.541863][ T8401] device hsr_slave_1 entered promiscuous mode [ 61.601454][ T8401] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 61.609242][ T8401] Cannot create hsr debugfs directory [ 61.640753][ T8406] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.649402][ T8406] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.657189][ T8406] device bridge_slave_0 entered promiscuous mode [ 61.664542][ T8404] chnl_net:caif_netlink_parms(): no params data found [ 61.697056][ T8406] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.704298][ T8406] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.713023][ T8406] device bridge_slave_1 entered promiscuous mode [ 61.785546][ T8406] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.798896][ T8406] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.846077][ T8404] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.853297][ T8404] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.860782][ T8404] device bridge_slave_0 entered promiscuous mode [ 61.868245][ T8408] chnl_net:caif_netlink_parms(): no params data found [ 61.894868][ T8404] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.902054][ T8404] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.909584][ T8404] device bridge_slave_1 entered promiscuous mode [ 61.929633][ T8404] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.943842][ T8406] team0: Port device team_slave_0 added [ 61.961357][ T8404] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.982778][ T8406] team0: Port device team_slave_1 added [ 61.994969][ T8401] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 62.038033][ T8401] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 62.095118][ T8401] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 62.179007][ T8408] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.186438][ T8408] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.194203][ T8408] device bridge_slave_0 entered promiscuous mode [ 62.204312][ T8398] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.211606][ T8401] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 62.273571][ T8404] team0: Port device team_slave_0 added [ 62.281997][ T8404] team0: Port device team_slave_1 added [ 62.292764][ T8408] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.299957][ T8408] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.307961][ T8408] device bridge_slave_1 entered promiscuous mode [ 62.373468][ T8406] device hsr_slave_0 entered promiscuous mode [ 62.431800][ T8406] device hsr_slave_1 entered promiscuous mode [ 62.491185][ T8406] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 62.498772][ T8406] Cannot create hsr debugfs directory [ 62.530595][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 62.539946][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.548351][ T8410] chnl_net:caif_netlink_parms(): no params data found [ 62.605081][ T8404] device hsr_slave_0 entered promiscuous mode [ 62.661520][ T8404] device hsr_slave_1 entered promiscuous mode [ 62.691081][ T8404] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 62.698652][ T8404] Cannot create hsr debugfs directory [ 62.719197][ T8398] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.731252][ T8408] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.760473][ T8408] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.787443][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 62.796291][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.804908][ T2680] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.812057][ T2680] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.820032][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 62.828879][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.837465][ T2680] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.844549][ T2680] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.856314][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 62.872275][ T8408] team0: Port device team_slave_0 added [ 62.883033][ T8408] team0: Port device team_slave_1 added [ 62.902529][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 62.936044][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 62.945770][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 62.954771][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.964288][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 63.033746][ T8408] device hsr_slave_0 entered promiscuous mode [ 63.074057][ T8408] device hsr_slave_1 entered promiscuous mode [ 63.111177][ T8408] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 63.118813][ T8408] Cannot create hsr debugfs directory [ 63.136484][ T8410] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.144579][ T8410] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.154032][ T8410] device bridge_slave_0 entered promiscuous mode [ 63.161199][ T8406] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 63.217195][ T8406] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 63.264792][ T8406] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 63.322540][ T8410] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.329621][ T8410] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.337842][ T8410] device bridge_slave_1 entered promiscuous mode [ 63.345744][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 63.355447][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 63.364032][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 63.372462][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 63.385152][ T8398] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 63.396379][ T8398] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 63.406780][ T8406] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 63.475455][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 63.484168][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 63.527171][ T8410] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.540240][ T8410] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.551232][ T8404] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 63.620550][ T8404] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 63.655597][ T8404] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 63.719945][ T8410] team0: Port device team_slave_0 added [ 63.728540][ T8410] team0: Port device team_slave_1 added [ 63.742108][ T8404] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 63.783414][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 63.790868][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 63.842911][ T8410] device hsr_slave_0 entered promiscuous mode [ 63.881528][ T8410] device hsr_slave_1 entered promiscuous mode [ 63.921199][ T8410] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 63.928786][ T8410] Cannot create hsr debugfs directory [ 63.958624][ T8398] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.002862][ T8408] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 64.057439][ T8408] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 64.114316][ T8408] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 64.174373][ T8408] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 64.269998][ T8401] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.303684][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 64.313044][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 64.322140][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.329726][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.348737][ T8398] device veth0_vlan entered promiscuous mode [ 64.359302][ T8401] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.379072][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 64.387773][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 64.396638][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 64.405698][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 64.419641][ T8398] device veth1_vlan entered promiscuous mode [ 64.445845][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 64.455088][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 64.464603][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.473093][ T2912] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.480128][ T2912] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.488333][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 64.498949][ T8406] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.518768][ T8404] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.546945][ T8410] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 64.592982][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 64.601960][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 64.610939][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.619374][ T2764] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.626463][ T2764] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.634930][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.642667][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.650193][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 64.658865][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 64.667353][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 64.675979][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.685409][ T2764] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.697472][ T8404] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.713542][ T8410] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 64.757162][ T8410] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 64.813413][ T8410] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 64.832346][ T8406] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.839191][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 64.847595][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.856841][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 64.865203][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.873612][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.881333][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.895193][ T8401] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.907601][ T8401] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.932392][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 64.958639][ T2912] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.977911][ T2912] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.985025][ T2912] bridge0: port 1(bridge_slave_0) entered forwarding state [ 169.970960][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 169.977838][ C1] rcu: 1-...!: (10499 ticks this GP) idle=bda/1/0x4000000000000002 softirq=11393/11393 fqs=1 [ 169.988326][ C1] (t=10500 jiffies g=6601 q=136) [ 169.993342][ C1] rcu: rcu_preempt kthread starved for 10498 jiffies! g6601 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 170.004430][ C1] rcu: RCU grace-period kthread stack dump: [ 170.010310][ C1] rcu_preempt R running task 29104 10 2 0x80004000 [ 170.018200][ C1] Call Trace: [ 170.021484][ C1] __schedule+0x9a0/0xcc0 [ 170.025811][ C1] schedule+0x181/0x210 [ 170.029960][ C1] schedule_timeout+0x14f/0x240 [ 170.034800][ C1] ? run_local_timers+0x120/0x120 [ 170.039817][ C1] rcu_gp_kthread+0xed8/0x1770 [ 170.044578][ C1] kthread+0x332/0x350 [ 170.048633][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 170.053745][ C1] ? kthread_blkcg+0xe0/0xe0 [ 170.058322][ C1] ret_from_fork+0x24/0x30 [ 170.062749][ C1] NMI backtrace for cpu 1 [ 170.067067][ C1] CPU: 1 PID: 8415 Comm: syz-executor.0 Not tainted 5.5.0-rc5-syzkaller #0 [ 170.075633][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 170.085674][ C1] Call Trace: [ 170.088946][ C1] [ 170.091792][ C1] dump_stack+0x1fb/0x318 [ 170.096116][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 170.100954][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 170.107104][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 170.113159][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 170.119128][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 170.125006][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 170.130121][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 170.135313][ C1] ? trace_hardirqs_off+0x74/0x80 [ 170.140328][ C1] update_process_times+0x12d/0x180 [ 170.145519][ C1] tick_sched_timer+0x263/0x420 [ 170.150381][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 170.155939][ C1] __hrtimer_run_queues+0x403/0x840 [ 170.161609][ C1] hrtimer_interrupt+0x38c/0xda0 [ 170.166558][ C1] ? debug_smp_processor_id+0x9/0x20 [ 170.171836][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 170.177369][ C1] apic_timer_interrupt+0xf/0x20 [ 170.182306][ C1] [ 170.185256][ C1] RIP: 0010:free_thread_stack+0x151/0x590 [ 170.190985][ C1] Code: 31 f6 e8 02 8d 6f 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 73 94 6a 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 55 94 6a 00 48 8b 3b be fc ff ff ff e8 28 04 00 [ 170.210596][ C1] RSP: 0018:ffffc90001ff7c70 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 170.218997][ C1] RAX: 1ffff11012bdd7f1 RBX: ffff888095eebf88 RCX: 0000000000000000 [ 170.226959][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00023bff40 [ 170.234928][ C1] RBP: ffffc90001ff7ca8 R08: dffffc0000000000 R09: fffffbfff12c962d [ 170.242888][ C1] R10: fffffbfff12c962d R11: 0000000000000000 R12: ffff8880a7933020 [ 170.251371][ C1] R13: dffffc0000000000 R14: 1ffff11014f26604 R15: ffff88808f603438 [ 170.259357][ C1] put_task_stack+0xa3/0x130 [ 170.263941][ C1] finish_task_switch+0x3f1/0x550 [ 170.268958][ C1] __schedule+0x9a8/0xcc0 [ 170.273287][ C1] ? ___preempt_schedule+0x16/0x18 [ 170.278383][ C1] preempt_schedule+0xdb/0x120 [ 170.283138][ C1] ___preempt_schedule+0x16/0x18 [ 170.288068][ C1] ? do_group_exit+0x2a8/0x2b0 [ 170.292823][ C1] _raw_spin_unlock_irq+0x77/0x80 [ 170.297835][ C1] do_group_exit+0x2a8/0x2b0 [ 170.302433][ C1] __do_sys_exit_group+0x17/0x20 [ 170.307361][ C1] __se_sys_exit_group+0x14/0x20 [ 170.312286][ C1] __x64_sys_exit_group+0x3b/0x40 [ 170.317297][ C1] do_syscall_64+0xf7/0x1c0 [ 170.321810][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 170.327710][ C1] RIP: 0033:0x45af49 [ 170.331599][ C1] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 170.351192][ C1] RSP: 002b:00007ffc15a6c788 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 170.359604][ C1] RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045af49 [ 170.367565][ C1] RDX: 0000000000414ae1 RSI: fffffffffffffff7 RDI: 0000000000000000 [ 170.375542][ C1] RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffc15a6c7e0 [ 170.383667][ C1] R10: 0000000000760448 R11: 0000000000000246 R12: 0000000000000001 [ 170.391636][ C1] R13: 00007ffc15a6c7e0 R14: 0000000000000000 R15: 00007ffc15a6c7f0