[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.635127][ T27] audit: type=1800 audit(1578448250.368:25): pid=8453 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 51.673762][ T27] audit: type=1800 audit(1578448250.368:26): pid=8453 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 51.693765][ T27] audit: type=1800 audit(1578448250.368:27): pid=8453 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 '10.128.1.20' (ECDSA) to the list of known hosts. 2020/01/08 01:50:58 fuzzer started 2020/01/08 01:50:58 dialing manager at 10.128.0.26:35703 2020/01/08 01:50:59 syscalls: 2824 2020/01/08 01:50:59 code coverage: enabled 2020/01/08 01:50:59 comparison tracing: enabled 2020/01/08 01:50:59 extra coverage: enabled 2020/01/08 01:50:59 setuid sandbox: enabled 2020/01/08 01:50:59 namespace sandbox: enabled 2020/01/08 01:50:59 Android sandbox: /sys/fs/selinux/policy does not exist 2020/01/08 01:50:59 fault injection: enabled 2020/01/08 01:50:59 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/01/08 01:50:59 net packet injection: enabled 2020/01/08 01:50:59 net device setup: enabled 2020/01/08 01:50:59 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2020/01/08 01:50:59 devlink PCI setup: PCI device 0000:00:10.0 is not available 01:51:00 executing program 0: r0 = socket(0x10, 0x3, 0x0) write(r0, &(0x7f00000000c0)="240000001e005f0214fffffffffffff80200000001000000000000000600090000000000", 0x24) 01:51:00 executing program 1: r0 = syz_open_dev$dri(&(0x7f00000002c0)='/dev/dri/card#\x00', 0x36a7, 0x0) ioctl(r0, 0xffffffffffffffad, &(0x7f0000000080)) syzkaller login: [ 61.672121][ T8619] IPVS: ftp: loaded support on port[0] = 21 01:51:00 executing program 2: r0 = socket(0x200000000000011, 0x3, 0x0) ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000580)={'veth0_to_bond\x00', 0x0}) bind$packet(r0, &(0x7f0000000080)={0x11, 0x0, r1, 0x1, 0x0, 0x6, @local}, 0x14) getsockname$packet(r0, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000680)=0xff7d) bpf$PROG_LOAD(0x5, &(0x7f0000006c80)={0x3, 0x3, &(0x7f0000006b40)=@framed, &(0x7f0000006b80)='GPL\x00', 0x0, 0x1000000, 0x0, 0x0, 0x0, [], r2, 0x0, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0}, 0x70) getsockname$packet(0xffffffffffffffff, 0x0, 0x0) ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, 0x0) getsockname$packet(0xffffffffffffffff, 0x0, 0x0) bpf$PROG_LOAD(0x5, 0x0, 0x0) bpf$PROG_LOAD(0x5, 0x0, 0x0) getsockopt$inet6_IPV6_XFRM_POLICY(0xffffffffffffffff, 0x29, 0x23, 0x0, 0x0) socket(0x0, 0x0, 0x0) ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, 0x0) bind$packet(0xffffffffffffffff, 0x0, 0x0) getsockname$packet(0xffffffffffffffff, 0x0, 0x0) bpf$PROG_LOAD(0x5, 0x0, 0x0) bind$packet(0xffffffffffffffff, 0x0, 0x0) getsockname$packet(0xffffffffffffffff, 0x0, 0x0) bind$packet(0xffffffffffffffff, 0x0, 0x0) [ 61.843276][ T8621] IPVS: ftp: loaded support on port[0] = 21 [ 61.861940][ T8619] chnl_net:caif_netlink_parms(): no params data found [ 61.977664][ T8619] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.003496][ T8619] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.011607][ T8619] device bridge_slave_0 entered promiscuous mode [ 62.037596][ T8619] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.053484][ T8619] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.061358][ T8619] device bridge_slave_1 entered promiscuous mode [ 62.091821][ T8619] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.091996][ T8624] IPVS: ftp: loaded support on port[0] = 21 [ 62.117874][ T8619] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.165316][ T8619] team0: Port device team_slave_0 added [ 62.187725][ T8619] team0: Port device team_slave_1 added 01:51:00 executing program 3: unshare(0x600) r0 = eventfd2(0x0, 0x0) ppoll(&(0x7f0000000040)=[{r0}], 0x1, &(0x7f0000000080), 0x0, 0x0) [ 62.216515][ T8621] chnl_net:caif_netlink_parms(): no params data found [ 62.316325][ T8619] device hsr_slave_0 entered promiscuous mode [ 62.373800][ T8619] device hsr_slave_1 entered promiscuous mode [ 62.452101][ T8621] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.460786][ T8621] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.470898][ T8621] device bridge_slave_0 entered promiscuous mode [ 62.488152][ T8628] IPVS: ftp: loaded support on port[0] = 21 01:51:01 executing program 4: socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = dup2(r1, r0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = openat$md(0xffffffffffffff9c, &(0x7f0000000080)='/dev/md0\x00', 0x0, 0x0) ioctl$BLKPG(r3, 0x40140921, &(0x7f0000000040)={0x0, 0x0, 0x0, 0x0}) [ 62.511317][ T8621] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.521107][ T8621] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.531336][ T8621] device bridge_slave_1 entered promiscuous mode [ 62.681362][ T8621] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.742343][ T8624] chnl_net:caif_netlink_parms(): no params data found [ 62.776420][ T8621] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.786528][ T8619] netdevsim netdevsim0 netdevsim0: renamed from eth0 01:51:01 executing program 5: r0 = bpf$MAP_CREATE(0x0, &(0x7f0000011fd4)={0x2, 0x4, 0x4, 0x1, 0x0, 0x1}, 0x13) bpf$MAP_LOOKUP_ELEM(0x1, &(0x7f0000000040)={r0, &(0x7f0000000000), &(0x7f0000000080)=""/4112}, 0x20) [ 62.836316][ T8619] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.940694][ T8619] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.976066][ T8619] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 63.081526][ T8631] IPVS: ftp: loaded support on port[0] = 21 [ 63.110830][ T8621] team0: Port device team_slave_0 added [ 63.138425][ T8633] IPVS: ftp: loaded support on port[0] = 21 [ 63.164739][ T8621] team0: Port device team_slave_1 added [ 63.194763][ T8624] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.201928][ T8624] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.210298][ T8624] device bridge_slave_0 entered promiscuous mode [ 63.218280][ T8628] chnl_net:caif_netlink_parms(): no params data found [ 63.259797][ T8624] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.268298][ T8624] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.276650][ T8624] device bridge_slave_1 entered promiscuous mode [ 63.346798][ T8621] device hsr_slave_0 entered promiscuous mode [ 63.393824][ T8621] device hsr_slave_1 entered promiscuous mode [ 63.453628][ T8621] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 63.461612][ T8621] Cannot create hsr debugfs directory [ 63.521481][ T8624] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.533064][ T8624] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.548426][ T8628] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.557266][ T8628] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.566523][ T8628] device bridge_slave_0 entered promiscuous mode [ 63.577450][ T8628] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.584970][ T8628] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.594107][ T8628] device bridge_slave_1 entered promiscuous mode [ 63.615151][ T8628] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.630638][ T8628] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.643992][ T8619] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.673221][ T8624] team0: Port device team_slave_0 added [ 63.702019][ T8624] team0: Port device team_slave_1 added [ 63.709779][ T8628] team0: Port device team_slave_0 added [ 63.727908][ T8619] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.738636][ T8628] team0: Port device team_slave_1 added [ 63.764132][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 63.772386][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.829399][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 63.839122][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.848219][ T2987] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.855579][ T2987] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.865174][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 63.873887][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 63.882816][ T2987] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.889914][ T2987] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.897597][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 63.926507][ T8633] chnl_net:caif_netlink_parms(): no params data found [ 63.941183][ T8631] chnl_net:caif_netlink_parms(): no params data found [ 63.950279][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 63.959100][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 64.005434][ T8624] device hsr_slave_0 entered promiscuous mode [ 64.043923][ T8624] device hsr_slave_1 entered promiscuous mode [ 64.083592][ T8624] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 64.091462][ T8624] Cannot create hsr debugfs directory [ 64.146429][ T8628] device hsr_slave_0 entered promiscuous mode [ 64.185921][ T8628] device hsr_slave_1 entered promiscuous mode [ 64.243604][ T8628] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 64.256080][ T8628] Cannot create hsr debugfs directory [ 64.311152][ T8621] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 64.362602][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 64.372151][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.381007][ T2987] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.397872][ T8621] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 64.460223][ T8621] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 64.547169][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 64.556555][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.565703][ T8621] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 64.625806][ T8631] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.632960][ T8631] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.640928][ T8631] device bridge_slave_0 entered promiscuous mode [ 64.651452][ T8631] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.658626][ T8631] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.666739][ T8631] device bridge_slave_1 entered promiscuous mode [ 64.682564][ T8633] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.690092][ T8633] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.697800][ T8633] device bridge_slave_0 entered promiscuous mode [ 64.717305][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 64.726730][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.741353][ T8619] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.756446][ T8619] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.779975][ T8633] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.787211][ T8633] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.795629][ T8633] device bridge_slave_1 entered promiscuous mode [ 64.803911][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 64.814740][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.855816][ T8631] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.868114][ T8631] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.917667][ T8624] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 64.957533][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 64.965961][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 64.978300][ T8619] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.986219][ T8628] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 65.033185][ T8621] 8021q: adding VLAN 0 to HW filter on device bond0 [ 65.042339][ T8624] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 65.106060][ T8624] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 65.145634][ T8624] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 65.195850][ T8628] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 65.247800][ T8631] team0: Port device team_slave_0 added [ 65.255371][ T8633] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 65.284717][ T8628] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 65.357268][ T8631] team0: Port device team_slave_1 added [ 65.363016][ T8628] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 65.405932][ T3082] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 65.414917][ T3082] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 65.422699][ T3082] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 65.431701][ T3082] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 65.442089][ T8633] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 65.453123][ T8621] 8021q: adding VLAN 0 to HW filter on device team0 [ 65.506529][ T8631] device hsr_slave_0 entered promiscuous mode [ 65.564553][ T8631] device hsr_slave_1 entered promiscuous mode [ 65.603567][ T8631] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 65.611163][ T8631] Cannot create hsr debugfs directory [ 65.634566][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 65.642965][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 65.691479][ T8619] device veth0_vlan entered promiscuous mode [ 65.706353][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 65.716052][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 65.725823][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 65.734744][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 65.743232][ T2678] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.750386][ T2678] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.758337][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 65.767118][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.775743][ T2678] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.783527][ T2678] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.791199][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.799867][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.810422][ T8633] team0: Port device team_slave_0 added [ 65.822249][ T8633] team0: Port device team_slave_1 added [ 65.837051][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 65.888649][ T8633] device hsr_slave_0 entered promiscuous mode [ 65.933800][ T8633] device hsr_slave_1 entered promiscuous mode [ 65.973705][ T8633] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 65.981301][ T8633] Cannot create hsr debugfs directory [ 65.992017][ T8619] device veth1_vlan entered promiscuous mode [ 66.021564][ T8621] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 66.033490][ T8621] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 66.048804][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 66.059679][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 66.069397][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 66.078585][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 66.087452][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.096879][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 66.105662][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 66.114237][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 66.122577][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 66.132129][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 66.140415][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 66.231019][ T8631] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 66.289299][ T8631] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 66.337726][ T8631] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 66.399065][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 66.406773][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 66.429467][ T8621] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 66.452301][ T8624] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.463040][ T8631] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 66.562547][ T8628] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.601811][ T8624] 8021q: adding VLAN 0 to HW filter on device team0 [ 66.610306][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 66.624875][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.669685][ T8621] device veth0_vlan entered promiscuous mode [ 66.685528][ T8621] device veth1_vlan entered promiscuous mode [ 66.713172][ T8628] 8021q: adding VLAN 0 to HW filter on device team0 [ 66.772418][ T8628] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 66.789342][ T8628] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 66.805961][ T8638] netlink: 'syz-executor.0': attribute type 9 has an invalid length. [ 171.623353][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 171.630272][ C0] rcu: 0-...!: (10499 ticks this GP) idle=d92/1/0x4000000000000002 softirq=12591/12591 fqs=7 [ 171.640771][ C0] (t=10500 jiffies g=7249 q=382) [ 171.645789][ C0] rcu: rcu_preempt kthread starved for 10481 jiffies! g7249 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 171.657163][ C0] rcu: RCU grace-period kthread stack dump: [ 171.663046][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 171.671438][ C0] Call Trace: [ 171.674829][ C0] __schedule+0x9a0/0xcc0 [ 171.679163][ C0] schedule+0x181/0x210 [ 171.683316][ C0] schedule_timeout+0x14f/0x240 [ 171.688189][ C0] ? run_local_timers+0x120/0x120 [ 171.693209][ C0] rcu_gp_kthread+0xed8/0x1770 [ 171.697975][ C0] kthread+0x332/0x350 [ 171.702045][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 171.707236][ C0] ? kthread_blkcg+0xe0/0xe0 [ 171.711830][ C0] ret_from_fork+0x24/0x30 [ 171.716252][ C0] NMI backtrace for cpu 0 [ 171.720572][ C0] CPU: 0 PID: 8591 Comm: udevd Not tainted 5.5.0-rc5-syzkaller #0 [ 171.728786][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 171.738842][ C0] Call Trace: [ 171.742128][ C0] [ 171.745067][ C0] dump_stack+0x1fb/0x318 [ 171.749395][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 171.754236][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 171.760387][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 171.766443][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 171.772440][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 171.778362][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 171.783477][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 171.788674][ C0] ? trace_hardirqs_off+0x74/0x80 [ 171.793967][ C0] update_process_times+0x12d/0x180 [ 171.799157][ C0] tick_sched_timer+0x263/0x420 [ 171.803996][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 171.809531][ C0] __hrtimer_run_queues+0x403/0x840 [ 171.814757][ C0] hrtimer_interrupt+0x38c/0xda0 [ 171.819711][ C0] ? debug_smp_processor_id+0x9/0x20 [ 171.824992][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 171.830527][ C0] apic_timer_interrupt+0xf/0x20 [ 171.835448][ C0] [ 171.838386][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 [ 171.844442][ C0] Code: 84 00 00 00 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d f4 f4 ed 07 48 89 de e8 84 f4 3b 00 5b 5d c3 cc 48 8b 04 24 <65> 48 8b 0c 25 c0 1d 02 00 65 8b 15 38 5f 8b 7e f7 c2 00 01 1f 00 [ 171.864034][ C0] RSP: 0018:ffffc90001df7ad8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 171.872434][ C0] RAX: ffffffff814897d3 RBX: 0000000000000000 RCX: ffff8880a7934500 [ 171.880394][ C0] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002576100 [ 171.888359][ C0] RBP: ffffc90001df7b00 R08: 000000000003a728 R09: ffffed1012590709 [ 171.896319][ C0] R10: ffffed1012590709 R11: 0000000000000000 R12: dffffc0000000000 [ 171.904279][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff888092c83838 [ 171.912266][ C0] ? mod_memcg_page_state+0x123/0x190 [ 171.917637][ C0] ? free_thread_stack+0x124/0x590 [ 171.922738][ C0] ? mod_memcg_page_state+0x123/0x190 [ 171.928101][ C0] free_thread_stack+0x168/0x590 [ 171.933027][ C0] put_task_stack+0xa3/0x130 [ 171.937608][ C0] finish_task_switch+0x3f1/0x550 [ 171.942808][ C0] __schedule+0x9a8/0xcc0 [ 171.947163][ C0] schedule+0x181/0x210 [ 171.951582][ C0] schedule_hrtimeout_range_clock+0x3c7/0x510 [ 171.957771][ C0] ? trace_hrtimer_expire_exit+0x2d0/0x2d0 [ 171.963679][ C0] schedule_hrtimeout_range+0x2a/0x40 [ 171.969047][ C0] ep_poll+0xa4d/0xe80 [ 171.973118][ C0] ? do_task_dead+0xc0/0xc0 [ 171.977615][ C0] ? __kasan_check_read+0x11/0x20 [ 171.982647][ C0] do_epoll_wait+0x1ee/0x260 [ 171.987229][ C0] __x64_sys_epoll_wait+0x9a/0xb0 [ 171.992245][ C0] do_syscall_64+0xf7/0x1c0 [ 171.996739][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 172.002616][ C0] RIP: 0033:0x7f7b9f194943 [ 172.007041][ C0] Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 [ 172.026634][ C0] RSP: 002b:00007ffcac489fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 [ 172.035034][ C0] RAX: ffffffffffffffda RBX: 0000000001cec250 RCX: 00007f7b9f194943 [ 172.042996][ C0] RDX: 0000000000000004 RSI: 00007ffcac48a0b0 RDI: 0000000000000007 [ 172.051043][ C0] RBP: 0000000000625500 R08: 00007ffcac489fd0 R09: 00007ffcac4c20b8 [ 172.059006][ C0] R10: 000000000000ee30 R11: 0000000000000246 R12: 0000000001ced730 [ 172.066966][ C0] R13: 00007ffcac48b107 R14: 0000000000000005 R15: 0000000001cec250