[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 43.712989][ T23] audit: type=1800 audit(1575353228.627:25): pid=8084 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 43.745695][ T23] audit: type=1800 audit(1575353228.637:26): pid=8084 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.767164][ T23] audit: type=1800 audit(1575353228.637:27): pid=8084 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 '10.128.1.16' (ECDSA) to the list of known hosts. 2019/12/03 06:07:18 fuzzer started 2019/12/03 06:07:20 dialing manager at 10.128.0.26:38907 2019/12/03 06:07:20 syscalls: 2697 2019/12/03 06:07:20 code coverage: enabled 2019/12/03 06:07:20 comparison tracing: enabled 2019/12/03 06:07:20 extra coverage: extra coverage is not supported by the kernel 2019/12/03 06:07:20 setuid sandbox: enabled 2019/12/03 06:07:20 namespace sandbox: enabled 2019/12/03 06:07:20 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 06:07:20 fault injection: enabled 2019/12/03 06:07:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 06:07:20 net packet injection: enabled 2019/12/03 06:07:20 net device setup: enabled 2019/12/03 06:07:20 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 06:07:20 devlink PCI setup: PCI device 0000:00:10.0 is not available 06:07:21 executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendmsg$nl_route(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={&(0x7f0000000040)=@ipv4_newroute={0x2c, 0x18, 0x1, 0x0, 0x0, {}, [@RTA_ENCAP_TYPE={0x8, 0x1e, 0x4}, @RTA_GATEWAY={0x8, 0x4, @loopback}]}, 0x2c}}, 0x0) 06:07:21 executing program 1: setrlimit(0x2, &(0x7f0000e63ff0)={0x0, 0x80000001}) r0 = socket$inet6_tcp(0xa, 0x1, 0x0) r1 = dup2(r0, r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) mmap(&(0x7f0000000000/0xfff000)=nil, 0xfff000, 0x3, 0x32, 0xffffffffffffffff, 0x0) syzkaller login: [ 56.780226][ T8247] IPVS: ftp: loaded support on port[0] = 21 06:07:21 executing program 2: r0 = syz_open_dev$sndctrl(&(0x7f00000000c0)='/dev/snd/controlC#\x00', 0x0, 0x0) ioctl$SNDRV_CTL_IOCTL_ELEM_ADD(r0, 0xc1105517, &(0x7f0000000540)={{0x0, 0x0, 0x0, 0x0, 'syz1\x00'}, 0x3, 0x0, 0x9, 0x0, 0x1, 0x0, 'syz1\x00', &(0x7f0000000040)=['si\'\xd3\x15\xc6'], 0x6}) [ 56.940768][ T8250] IPVS: ftp: loaded support on port[0] = 21 [ 56.952037][ T8247] chnl_net:caif_netlink_parms(): no params data found [ 57.073818][ T8247] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.096544][ T8247] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.116848][ T8247] device bridge_slave_0 entered promiscuous mode [ 57.132218][ T8252] IPVS: ftp: loaded support on port[0] = 21 [ 57.137018][ T8247] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.146791][ T8247] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.156893][ T8247] device bridge_slave_1 entered promiscuous mode [ 57.204650][ T8247] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link 06:07:22 executing program 3: r0 = syz_open_procfs(0x0, &(0x7f0000000180)='ns\x00') getdents(r0, &(0x7f00000000c0)=""/126, 0xfec0) getdents(r0, 0x0, 0x0) [ 57.248220][ T8247] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.343397][ T8250] chnl_net:caif_netlink_parms(): no params data found [ 57.369810][ T8247] team0: Port device team_slave_0 added [ 57.403065][ T8247] team0: Port device team_slave_1 added [ 57.461442][ T8252] chnl_net:caif_netlink_parms(): no params data found 06:07:22 executing program 4: syz_emit_ethernet(0x4e, &(0x7f00000000c0)={@local, @link_local, [], {@ipv6={0x86dd, {0x0, 0x6, "ee0600", 0x18, 0x32, 0x0, @empty, @local, {[], @icmpv6=@mld={0x0, 0x0, 0x0, 0x0, 0x0, @mcast1={0x0}}}}}}}, 0x0) [ 57.519607][ T8247] device hsr_slave_0 entered promiscuous mode [ 57.577210][ T8247] device hsr_slave_1 entered promiscuous mode [ 57.635484][ T8250] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.657095][ T8250] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.676479][ T8250] device bridge_slave_0 entered promiscuous mode [ 57.717846][ T8250] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.725019][ T8250] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.737128][ T8250] device bridge_slave_1 entered promiscuous mode [ 57.745755][ T8256] IPVS: ftp: loaded support on port[0] = 21 06:07:22 executing program 5: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000180)='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) syz_kvm_setup_cpu$x86(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000000/0x18000)=nil, &(0x7f0000000100)=[@text16={0x10, &(0x7f0000000040)="6766c74424000a0000006766c7442402020000006766c744240600000000670f010b24cecec3f9cecf1466b9d5020000bad104ed66ba000000000f30b86c008ee8f20f09ba400066b886409b0c66ef0f221af72ff30fc7b6b90066b8090000000f23d00f21f866352000000c0f23f8", 0xcb4e5786}], 0x1, 0x0, 0x0, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_SET_USER_MEMORY_REGION(r1, 0x4020ae46, &(0x7f0000000400)={0x0, 0x3, 0x0, 0x2000, &(0x7f0000000000/0x2000)=nil}) syz_kvm_setup_cpu$x86(r1, 0xffffffffffffffff, &(0x7f0000000000/0x18000)=nil, 0x0, 0x0, 0x0, 0x0, 0x0) ioctl$KVM_REGISTER_COALESCED_MMIO(r1, 0x4010ae67, &(0x7f00000001c0)={0x0, 0x119000}) syz_kvm_setup_cpu$x86(0xffffffffffffffff, r2, &(0x7f0000000000/0x18000)=nil, 0x0, 0x0, 0x0, 0x0, 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000180)={0xffffffffffffffff}) r4 = dup(r3) ioctl$PERF_EVENT_IOC_ENABLE(r4, 0x8912, 0x400200) sendmsg$IPVS_CMD_GET_DEST(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, 0x0}, 0x0) bind$inet6(0xffffffffffffffff, 0x0, 0x0) ioctl$KVM_NMI(r2, 0xae9a) ioctl$KVM_RUN(r2, 0xae80, 0x0) [ 57.783080][ T8250] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.807715][ T8250] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.842714][ T8258] IPVS: ftp: loaded support on port[0] = 21 [ 57.854528][ T8247] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 57.964022][ T8252] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.971882][ T8252] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.979807][ T8252] device bridge_slave_0 entered promiscuous mode [ 57.991625][ T8252] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.998853][ T8252] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.006784][ T8252] device bridge_slave_1 entered promiscuous mode [ 58.013981][ T8247] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.059617][ T8247] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.131467][ T8247] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.193965][ T8250] team0: Port device team_slave_0 added [ 58.205303][ T8250] team0: Port device team_slave_1 added [ 58.279182][ T8250] device hsr_slave_0 entered promiscuous mode [ 58.316821][ T8250] device hsr_slave_1 entered promiscuous mode [ 58.366570][ T8250] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.388503][ T8260] IPVS: ftp: loaded support on port[0] = 21 [ 58.408704][ T8252] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.423596][ T8252] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.471106][ T8252] team0: Port device team_slave_0 added [ 58.482084][ T8252] team0: Port device team_slave_1 added [ 58.500791][ T8250] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 58.579147][ T8250] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 58.621006][ T8250] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 58.688045][ T8250] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 58.808075][ T8252] device hsr_slave_0 entered promiscuous mode [ 58.846843][ T8252] device hsr_slave_1 entered promiscuous mode [ 58.906592][ T8252] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.935282][ T8258] chnl_net:caif_netlink_parms(): no params data found [ 59.021166][ T8252] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 59.099430][ T8256] chnl_net:caif_netlink_parms(): no params data found [ 59.117521][ T8258] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.124743][ T8258] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.132730][ T8258] device bridge_slave_0 entered promiscuous mode [ 59.141357][ T8252] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 59.201691][ T8252] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 59.242828][ T8252] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 59.282199][ T8258] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.289917][ T8258] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.298400][ T8258] device bridge_slave_1 entered promiscuous mode [ 59.343395][ T8258] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.394562][ T8258] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.404304][ T8256] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.412828][ T8256] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.421255][ T8256] device bridge_slave_0 entered promiscuous mode [ 59.428985][ T8256] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.436044][ T8256] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.443974][ T8256] device bridge_slave_1 entered promiscuous mode [ 59.452512][ T8260] chnl_net:caif_netlink_parms(): no params data found [ 59.482953][ T8247] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.491767][ T8250] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.515021][ T8258] team0: Port device team_slave_0 added [ 59.534038][ T8247] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.553691][ T8256] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.571708][ T1102] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.580814][ T1102] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.591331][ T8258] team0: Port device team_slave_1 added [ 59.604424][ T8250] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.613268][ T8256] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.635656][ T8260] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.644551][ T8260] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.652657][ T8260] device bridge_slave_0 entered promiscuous mode [ 59.661165][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.670413][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.679184][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.686463][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.694564][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.703307][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.711916][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 59.720561][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.729187][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.736251][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.744542][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 59.774069][ T8260] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.782276][ T8260] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.790289][ T8260] device bridge_slave_1 entered promiscuous mode [ 59.803888][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 59.813656][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.822846][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.831445][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.838571][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.846664][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 59.855118][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 59.863864][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.872265][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.879351][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.887188][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 59.895677][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.979210][ T8258] device hsr_slave_0 entered promiscuous mode [ 60.026877][ T8258] device hsr_slave_1 entered promiscuous mode [ 60.086799][ T8258] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.113056][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 60.121371][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.130867][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.140656][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.150228][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.159486][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.168193][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.177204][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.185585][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.194358][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.203048][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.211925][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.220843][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.231250][ T8252] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.241943][ T3813] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.251683][ T3813] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.261737][ T8256] team0: Port device team_slave_0 added [ 60.269669][ T8260] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.282479][ T8260] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.300809][ T8250] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.312229][ T8250] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.333123][ T8256] team0: Port device team_slave_1 added [ 60.339697][ T8247] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.351284][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.359571][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.368417][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.376961][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.385175][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.420410][ T8261] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.428452][ T8261] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.470177][ T8256] device hsr_slave_0 entered promiscuous mode [ 60.516977][ T8256] device hsr_slave_1 entered promiscuous mode [ 60.556594][ T8256] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.566051][ T8260] team0: Port device team_slave_0 added [ 60.576575][ T8260] team0: Port device team_slave_1 added [ 60.588275][ T8252] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.610698][ T8266] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.618677][ T8266] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.626237][ T8266] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.635063][ T8266] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.643501][ T8266] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.650698][ T8266] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.664446][ T8250] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.676927][ T8258] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 60.708776][ T8258] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 60.735839][ T8258] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 60.788989][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 60.806475][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.815051][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.824251][ T48] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.831380][ T48] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.839515][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.860709][ T8247] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.899080][ T8260] device hsr_slave_0 entered promiscuous mode [ 166.126354][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 166.133099][ C1] rcu: 1-...!: (1 GPs behind) idle=93a/1/0x4000000000000002 softirq=11235/11236 fqs=24 [ 166.143912][ C1] (t=10500 jiffies g=6309 q=132) [ 166.149120][ C1] rcu: rcu_preempt kthread starved for 10446 jiffies! g6309 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 166.160199][ C1] rcu: RCU grace-period kthread stack dump: [ 166.166075][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 166.173997][ C1] Call Trace: [ 166.177287][ C1] __schedule+0x9a0/0xcc0 [ 166.181625][ C1] schedule+0x181/0x210 [ 166.185774][ C1] schedule_timeout+0x14f/0x240 [ 166.190618][ C1] ? run_local_timers+0x120/0x120 [ 166.195664][ C1] rcu_gp_kthread+0xed8/0x1770 [ 166.200451][ C1] kthread+0x332/0x350 [ 166.204516][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 166.209644][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.214249][ C1] ret_from_fork+0x24/0x30 [ 166.218671][ C1] NMI backtrace for cpu 1 [ 166.222993][ C1] CPU: 1 PID: 87 Comm: kworker/u4:3 Not tainted 5.4.0-syzkaller #0 [ 166.230968][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.241010][ C1] Workqueue: events_unbound fsnotify_mark_destroy_workfn [ 166.248024][ C1] Call Trace: [ 166.251285][ C1] [ 166.254116][ C1] dump_stack+0x1fb/0x318 [ 166.258423][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 166.263261][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 166.269391][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 166.275430][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 166.281387][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 166.287252][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 166.292470][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 166.297738][ C1] ? trace_hardirqs_off+0x74/0x80 [ 166.302785][ C1] update_process_times+0x12d/0x180 [ 166.308000][ C1] tick_sched_timer+0x263/0x420 [ 166.312839][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.318361][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.323539][ C1] hrtimer_interrupt+0x38c/0xda0 [ 166.328486][ C1] ? debug_smp_processor_id+0x9/0x20 [ 166.340711][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 166.346243][ C1] apic_timer_interrupt+0xf/0x20 [ 166.351162][ C1] [ 166.354077][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 166.360378][ C1] Code: 64 02 3b 00 5b 5d c3 cc 48 8b 04 24 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 b8 81 8b 7e f7 c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 <83> fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 8d 7e 01 8b 89 84 [ 166.380003][ C1] RSP: 0018:ffffc900011978a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.388392][ C1] RAX: ffffffff81487326 RBX: ffffea00026ed380 RCX: ffff8880a9432200 [ 166.396354][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00026ed380 [ 166.404314][ C1] RBP: ffffc900011978c8 R08: dffffc0000000000 R09: fffffbfff120248a [ 166.412301][ C1] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff88809ed5ab20 [ 166.420254][ C1] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff888091609728 [ 166.428217][ C1] ? mod_memcg_page_state+0x16/0x190 [ 166.433481][ C1] ? mod_memcg_page_state+0x16/0x190 [ 166.438748][ C1] free_thread_stack+0x168/0x590 [ 166.443664][ C1] put_task_stack+0xa3/0x130 [ 166.448231][ C1] finish_task_switch+0x3f1/0x550 [ 166.453246][ C1] __schedule+0x9a8/0xcc0 [ 166.457578][ C1] ? ___preempt_schedule+0x16/0x18 [ 166.462696][ C1] preempt_schedule+0xdb/0x120 [ 166.467447][ C1] ___preempt_schedule+0x16/0x18 [ 166.472374][ C1] _raw_spin_unlock_irqrestore+0xcc/0xe0 [ 166.477985][ C1] __call_srcu+0x7ab/0xb00 [ 166.482385][ C1] __synchronize_srcu+0x1cf/0x260 [ 166.487395][ C1] ? rcu_read_lock_any_held+0x1a0/0x1a0 [ 166.492944][ C1] synchronize_srcu+0x2cb/0x2f0 [ 166.497794][ C1] fsnotify_mark_destroy_workfn+0xe5/0x2a0 [ 166.503642][ C1] ? rcu_read_lock_sched_held+0x10b/0x170 [ 166.509343][ C1] process_one_work+0x7ef/0x10d0 [ 166.514262][ C1] worker_thread+0xc01/0x1630 [ 166.518930][ C1] kthread+0x332/0x350 [ 166.522970][ C1] ? rcu_lock_release+0x30/0x30 [ 166.527807][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.532389][ C1] ret_from_fork+0x24/0x30