[ 42.407389][ T23] audit: type=1800 audit(1575352780.529:26): pid=8060 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.457117][ T23] audit: type=1800 audit(1575352780.529:27): pid=8060 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 42.488542][ T23] audit: type=1800 audit(1575352780.539:28): pid=8060 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. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 43.039452][ T23] audit: type=1800 audit(1575352781.189:29): pid=8060 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. 2019/12/03 05:59:51 fuzzer started 2019/12/03 05:59:52 dialing manager at 10.128.0.26:38907 2019/12/03 05:59:52 syscalls: 2697 2019/12/03 05:59:52 code coverage: enabled 2019/12/03 05:59:52 comparison tracing: enabled 2019/12/03 05:59:52 extra coverage: extra coverage is not supported by the kernel 2019/12/03 05:59:52 setuid sandbox: enabled 2019/12/03 05:59:52 namespace sandbox: enabled 2019/12/03 05:59:52 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 05:59:52 fault injection: enabled 2019/12/03 05:59:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 05:59:52 net packet injection: enabled 2019/12/03 05:59:52 net device setup: enabled 2019/12/03 05:59:52 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 05:59:52 devlink PCI setup: PCI device 0000:00:10.0 is not available 05:59:53 executing program 0: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00009e3ff6)='/dev/ptmx\x00', 0x0, 0x0) ioctl$TCSETS(r0, 0x40045431, &(0x7f00005befdc)) r1 = syz_open_pts(r0, 0x20201) fcntl$setstatus(r1, 0x4, 0x2804) ioctl$TCXONC(r1, 0x540a, 0x0) write(r1, &(0x7f00000000c0)="1e", 0x1) socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000180)={0xffffffffffffffff, 0xffffffffffffffff}) r3 = dup(r2) ioctl$PERF_EVENT_IOC_ENABLE(r3, 0x8912, 0x400200) ioctl$TIOCSETD(r1, 0x5423, &(0x7f0000000040)=0x3) close(r0) 05:59:53 executing program 1: socketpair$unix(0x1, 0x5, 0x0, &(0x7f00000000c0)={0xffffffffffffffff, 0xffffffffffffffff}) fcntl$lock(r0, 0x7, &(0x7f0000002000)) fcntl$lock(r0, 0x7, &(0x7f0000000040)={0x1, 0x0, 0x1}) fcntl$lock(r0, 0x7, &(0x7f0000000180)={0x0, 0x0, 0x0, 0x2}) syzkaller login: [ 55.795014][ T8223] IPVS: ftp: loaded support on port[0] = 21 [ 55.952897][ T8223] chnl_net:caif_netlink_parms(): no params data found [ 55.993514][ T8223] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.013530][ T8223] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.022105][ T8223] device bridge_slave_0 entered promiscuous mode 05:59:54 executing program 2: r0 = timerfd_create(0x0, 0x0) clock_gettime(0x0, &(0x7f0000000080)={0x0, 0x0}) timerfd_settime(r0, 0x1, &(0x7f00000000c0)={{0x0, r1+10000000}, {0x0, 0x1c9c380}}, 0x0) timerfd_gettime(r0, &(0x7f0000000000)) [ 56.038211][ T8223] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.046203][ T8226] IPVS: ftp: loaded support on port[0] = 21 [ 56.052437][ T8223] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.064532][ T8223] device bridge_slave_1 entered promiscuous mode [ 56.126135][ T8223] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.150858][ T8223] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.191080][ T8223] team0: Port device team_slave_0 added [ 56.214406][ T8223] team0: Port device team_slave_1 added [ 56.242295][ T8228] IPVS: ftp: loaded support on port[0] = 21 05:59:54 executing program 3: r0 = openat$uinput(0xffffffffffffff9c, &(0x7f0000000080)='/dev/uinput\x00', 0x800000805, 0x0) write$uinput_user_dev(r0, &(0x7f0000000880)={'syz0\x00'}, 0x45c) ioctl$UI_DEV_SETUP(r0, 0x5501, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000080)='stat\t\xc0\xd2\xfe\xbc\xf9\xdf-\xea\xc8\xc1w\xff\x17\x12H\xe9\x11\x93Q0I\xf81U\ro}\xe6l\xf67\xbd\xbf\x13\x11\x92\f\x8a&\xed\xa4\xdc\xc3x?\x9d\xb5\x11k4\xd3\x1b\x05\x12\xa5`\x8a\xaf\xf0\x1eyR4\f\xd6\xfd\x00\x00\x00\x00', 0x275a, 0x0) mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x0, 0x12, r1, 0x0) write$input_event(r0, &(0x7f00000000c0)={{0x77359400}}, 0x6a) [ 56.300340][ T8223] device hsr_slave_0 entered promiscuous mode [ 56.368227][ T8223] device hsr_slave_1 entered promiscuous mode [ 56.452878][ T8230] IPVS: ftp: loaded support on port[0] = 21 [ 56.466292][ T8223] netdevsim netdevsim0 netdevsim0: renamed from eth0 05:59:54 executing program 4: socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000040)={0xffffffffffffffff, 0xffffffffffffffff}) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) bpf$PROG_LOAD(0x5, &(0x7f000000e000)={0x1, 0x4, &(0x7f0000000040)=@framed={{0xffffffb4, 0x5, 0x0, 0x0, 0x0, 0x71, 0x10, 0x39}, [@ldst={0x6, 0x0, 0x2}]}, &(0x7f0000003ff6)='G\x00', 0x5, 0xfd90, &(0x7f000000cf3d)=""/195, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x0, 0x10, &(0x7f0000000000), 0x1dd}, 0x48) [ 56.547806][ T8223] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 56.589133][ T8223] netdevsim netdevsim0 netdevsim2: renamed from eth2 05:59:54 executing program 5: mbind(&(0x7f0000ffb000/0x4000)=nil, 0x4000, 0x0, &(0x7f0000000040), 0x2, 0x5) [ 56.715683][ T8223] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 56.765703][ T8226] chnl_net:caif_netlink_parms(): no params data found [ 56.789998][ T8233] IPVS: ftp: loaded support on port[0] = 21 [ 56.871582][ T8223] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.879095][ T8223] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.887173][ T8223] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.894974][ T8223] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.905532][ T8226] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.916039][ T8226] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.924096][ T8226] device bridge_slave_0 entered promiscuous mode [ 56.974430][ T8235] IPVS: ftp: loaded support on port[0] = 21 [ 56.980652][ T8226] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.988691][ T8226] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.996866][ T8226] device bridge_slave_1 entered promiscuous mode [ 57.011534][ T3900] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.020200][ T3900] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.033104][ T8228] chnl_net:caif_netlink_parms(): no params data found [ 57.086838][ T8228] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.094951][ T8228] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.102926][ T8228] device bridge_slave_0 entered promiscuous mode [ 57.111893][ T8226] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.123000][ T8226] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.147964][ T8228] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.155057][ T8228] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.164047][ T8228] device bridge_slave_1 entered promiscuous mode [ 57.201507][ T8228] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.216318][ T8228] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.266429][ T8226] team0: Port device team_slave_0 added [ 57.275661][ T8226] team0: Port device team_slave_1 added [ 57.292960][ T8228] team0: Port device team_slave_0 added [ 57.301011][ T8228] team0: Port device team_slave_1 added [ 57.360273][ T8226] device hsr_slave_0 entered promiscuous mode [ 57.398160][ T8226] device hsr_slave_1 entered promiscuous mode [ 57.437314][ T8226] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.468232][ T8233] chnl_net:caif_netlink_parms(): no params data found [ 57.483364][ T8230] chnl_net:caif_netlink_parms(): no params data found [ 57.539811][ T8228] device hsr_slave_0 entered promiscuous mode [ 57.587557][ T8228] device hsr_slave_1 entered promiscuous mode [ 57.627142][ T8228] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.714504][ T8226] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 57.778952][ T8233] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.786039][ T8233] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.793911][ T8233] device bridge_slave_0 entered promiscuous mode [ 57.805796][ T8233] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.813397][ T8233] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.821305][ T8233] device bridge_slave_1 entered promiscuous mode [ 57.831321][ T8223] 8021q: adding VLAN 0 to HW filter on device bond0 [ 57.851932][ T8226] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 57.924522][ T8233] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.935618][ T8228] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 57.980398][ T8228] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 58.049775][ T8226] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 58.089725][ T8230] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.096813][ T8230] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.104870][ T8230] device bridge_slave_0 entered promiscuous mode [ 58.113570][ T8233] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.140122][ T8228] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 58.203909][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.212312][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.220608][ T8226] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 58.290536][ T8230] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.297728][ T8230] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.305462][ T8230] device bridge_slave_1 entered promiscuous mode [ 58.323363][ T8230] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.333781][ T8235] chnl_net:caif_netlink_parms(): no params data found [ 58.343792][ T8233] team0: Port device team_slave_0 added [ 58.352623][ T8228] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 58.400450][ T8230] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.419863][ T8223] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.428246][ T8230] team0: Port device team_slave_0 added [ 58.438544][ T8230] team0: Port device team_slave_1 added [ 58.444977][ T8233] team0: Port device team_slave_1 added [ 58.488873][ T8233] device hsr_slave_0 entered promiscuous mode [ 58.527458][ T8233] device hsr_slave_1 entered promiscuous mode [ 58.579964][ T8233] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.634374][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 58.644108][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.653023][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.660134][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.668113][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 58.676592][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.685171][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.692332][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.769872][ T8230] device hsr_slave_0 entered promiscuous mode [ 58.807489][ T8230] device hsr_slave_1 entered promiscuous mode [ 58.848005][ T8230] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.855667][ T8235] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.863179][ T8235] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.872330][ T8235] device bridge_slave_0 entered promiscuous mode [ 58.881954][ T8235] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.889664][ T8235] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.898021][ T8235] device bridge_slave_1 entered promiscuous mode [ 58.906334][ T3900] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 58.960324][ T8235] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.972849][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 58.981792][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 58.990547][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.009463][ T8233] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 59.051358][ T8233] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 59.110364][ T8235] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.135371][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.143324][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 59.152092][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.177237][ T8233] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 59.201049][ T8235] team0: Port device team_slave_0 added [ 59.207616][ T8233] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 59.262315][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 59.272261][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.281926][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 59.291518][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.301007][ T8235] team0: Port device team_slave_1 added [ 59.309703][ T8230] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 59.349233][ T8230] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 59.380023][ T8230] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 59.419321][ T8230] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 59.462036][ T8223] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.539304][ T8235] device hsr_slave_0 entered promiscuous mode [ 59.577554][ T8235] device hsr_slave_1 entered promiscuous mode [ 59.627222][ T8235] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.644211][ T8223] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.663391][ T8228] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.671380][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.679657][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.711675][ T8226] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.751041][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.759326][ T3191] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.780436][ T8226] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.797285][ T8235] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 59.849461][ T8235] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 59.925807][ T8233] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.934460][ T8235] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 164.966973][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 164.973824][ C0] rcu: 0-...!: (1 GPs behind) idle=a56/1/0x4000000000000002 softirq=11157/11158 fqs=38 [ 164.983870][ C0] (t=10500 jiffies g=6253 q=163) [ 164.988900][ C0] rcu: rcu_preempt kthread starved for 10418 jiffies! g6253 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 164.999982][ C0] rcu: RCU grace-period kthread stack dump: [ 165.005856][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 165.013741][ C0] Call Trace: [ 165.017028][ C0] __schedule+0x9a0/0xcc0 [ 165.021351][ C0] schedule+0x181/0x210 [ 165.025495][ C0] schedule_timeout+0x14f/0x240 [ 165.030330][ C0] ? run_local_timers+0x120/0x120 [ 165.035342][ C0] rcu_gp_kthread+0xed8/0x1770 [ 165.040103][ C0] kthread+0x332/0x350 [ 165.044158][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 165.049277][ C0] ? kthread_blkcg+0xe0/0xe0 [ 165.053853][ C0] ret_from_fork+0x24/0x30 [ 165.058267][ C0] NMI backtrace for cpu 0 [ 165.062758][ C0] CPU: 0 PID: 4171 Comm: udevd Not tainted 5.4.0-syzkaller #0 [ 165.070192][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 165.080229][ C0] Call Trace: [ 165.083496][ C0] [ 165.086336][ C0] dump_stack+0x1fb/0x318 [ 165.090692][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 165.095625][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 165.101771][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 165.107843][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 165.113810][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 165.119707][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 165.124811][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 165.129999][ C0] ? trace_hardirqs_off+0x74/0x80 [ 165.135014][ C0] update_process_times+0x12d/0x180 [ 165.140232][ C0] tick_sched_timer+0x263/0x420 [ 165.145086][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 165.150851][ C0] __hrtimer_run_queues+0x403/0x840 [ 165.156059][ C0] hrtimer_interrupt+0x38c/0xda0 [ 165.161004][ C0] ? debug_smp_processor_id+0x9/0x20 [ 165.166453][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 165.172073][ C0] apic_timer_interrupt+0xf/0x20 [ 165.176996][ C0] [ 165.179923][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 165.186061][ C0] 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 [ 165.205668][ C0] RSP: 0018:ffffc90001da7ad8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 165.214073][ C0] RAX: ffffffff81487326 RBX: ffffea00029cd5c0 RCX: ffff88809f65e4c0 [ 165.222351][ C0] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00029cd5c0 [ 165.230323][ C0] RBP: ffffc90001da7b00 R08: 000000000003a768 R09: ffffed1011a71ee7 [ 165.238400][ C0] R10: ffffed1011a71ee7 R11: 0000000000000000 R12: ffff88808da00d20 [ 165.246372][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88808d38f728 [ 165.254352][ C0] ? mod_memcg_page_state+0x16/0x190 [ 165.259628][ C0] ? free_thread_stack+0x124/0x590 [ 165.264722][ C0] ? mod_memcg_page_state+0x16/0x190 [ 165.269992][ C0] free_thread_stack+0x168/0x590 [ 165.274926][ C0] put_task_stack+0xa3/0x130 [ 165.279508][ C0] finish_task_switch+0x3f1/0x550 [ 165.284555][ C0] __schedule+0x9a8/0xcc0 [ 165.288908][ C0] schedule+0x181/0x210 [ 165.293155][ C0] schedule_hrtimeout_range_clock+0x3c7/0x510 [ 165.299223][ C0] ? trace_hrtimer_expire_exit+0x2d0/0x2d0 [ 165.305058][ C0] schedule_hrtimeout_range+0x2a/0x40 [ 165.310438][ C0] ep_poll+0xa4d/0xe80 [ 165.314515][ C0] ? do_task_dead+0xc0/0xc0 [ 165.319095][ C0] ? __kasan_check_read+0x11/0x20 [ 165.324115][ C0] do_epoll_wait+0x1ee/0x260 [ 165.328698][ C0] __x64_sys_epoll_wait+0x9a/0xb0 [ 165.333710][ C0] do_syscall_64+0xf7/0x1c0 [ 165.338200][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 165.344078][ C0] RIP: 0033:0x7f8274239943 [ 165.348487][ 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 [ 165.368078][ C0] RSP: 002b:00007ffffb879d08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 [ 165.376507][ C0] RAX: ffffffffffffffda RBX: 0000000001954250 RCX: 00007f8274239943 [ 165.384468][ C0] RDX: 0000000000000004 RSI: 00007ffffb879dd0 RDI: 0000000000000007 [ 165.392426][ C0] RBP: 0000000000625500 R08: 00007ffffb879cf0 R09: 00007ffffb9de0b8 [ 165.400555][ C0] R10: 000000000000ee42 R11: 0000000000000246 R12: 00000000019662d0 [ 165.408598][ C0] R13: 00007ffffb87ae27 R14: 0000000000000005 R15: 0000000001954250