[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 42.871728][ T23] audit: type=1800 audit(1575398723.308:25): pid=7982 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 42.893393][ T23] audit: type=1800 audit(1575398723.308:26): pid=7982 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.913310][ T23] audit: type=1800 audit(1575398723.318:27): pid=7982 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 '10.128.1.45' (ECDSA) to the list of known hosts. 2019/12/03 18:45:35 fuzzer started 2019/12/03 18:45:37 dialing manager at 10.128.0.26:42111 2019/12/03 18:45:37 syscalls: 2689 2019/12/03 18:45:37 code coverage: enabled 2019/12/03 18:45:37 comparison tracing: enabled 2019/12/03 18:45:37 extra coverage: extra coverage is not supported by the kernel 2019/12/03 18:45:37 setuid sandbox: enabled 2019/12/03 18:45:37 namespace sandbox: enabled 2019/12/03 18:45:37 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 18:45:37 fault injection: enabled 2019/12/03 18:45:37 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 18:45:37 net packet injection: enabled 2019/12/03 18:45:37 net device setup: enabled 2019/12/03 18:45:37 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 18:45:37 devlink PCI setup: PCI device 0000:00:10.0 is not available 18:45:38 executing program 0: r0 = socket(0xa, 0x2, 0x0) r1 = socket$inet6_sctp(0xa, 0x10000000005, 0x84) getsockopt$sock_cred(r0, 0x1, 0x11, &(0x7f0000caaffb)={0x0, 0x0}, &(0x7f0000cab000)=0xa) setreuid(0x0, r2) ioctl$sock_ifreq(r1, 0x894c, 0x0) 18:45:38 executing program 1: syz_init_net_socket$x25(0xb, 0x2, 0x0) syzkaller login: [ 57.926068][ T8147] IPVS: ftp: loaded support on port[0] = 21 [ 58.063095][ T8147] chnl_net:caif_netlink_parms(): no params data found [ 58.090164][ T8150] IPVS: ftp: loaded support on port[0] = 21 [ 58.144607][ T8147] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.155063][ T8147] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.164082][ T8147] device bridge_slave_0 entered promiscuous mode 18:45:38 executing program 2: r0 = socket$nl_generic(0x10, 0x3, 0x10) r1 = syz_genetlink_get_family_id$tipc2(&(0x7f00000003c0)='TIPCv2\x00') sendmsg$TIPC_NL_MON_SET(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000340)={0x38, r1, 0x1, 0x0, 0x0, {0x9}, [@TIPC_NLA_LINK={0x24, 0x4, [@TIPC_NLA_LINK_PROP={0xc, 0x7, [@TIPC_NLA_PROP_WIN={0x8, 0x5, 0x4}]}, @TIPC_NLA_LINK_NAME={0x14, 0x1, 'broadcast-link\x00'}]}]}, 0x38}}, 0x0) [ 58.186361][ T8147] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.196809][ T8147] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.209306][ T8147] device bridge_slave_1 entered promiscuous mode [ 58.251393][ T8147] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.279929][ T8147] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.328137][ T8147] team0: Port device team_slave_0 added [ 58.364460][ T8147] team0: Port device team_slave_1 added 18:45:38 executing program 3: r0 = openat$ocfs2_control(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/ocfs2_control\x00', 0x0, 0x0) close(r0) [ 58.440522][ T8147] device hsr_slave_0 entered promiscuous mode [ 58.497770][ T8147] device hsr_slave_1 entered promiscuous mode [ 58.671955][ T8150] chnl_net:caif_netlink_parms(): no params data found [ 58.702930][ T8152] IPVS: ftp: loaded support on port[0] = 21 18:45:39 executing program 4: r0 = socket$kcm(0x2b, 0x1, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r0, 0x8912, 0x400200) bpf$PROG_LOAD(0x5, &(0x7f0000000200)={0x4, 0xe, &(0x7f0000000800)=ANY=[@ANYBLOB="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"], &(0x7f0000000340)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x1d4}, 0x48) [ 58.718895][ T8155] IPVS: ftp: loaded support on port[0] = 21 [ 58.861051][ T8147] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.951458][ T8150] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.967609][ T8150] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.976425][ T8150] device bridge_slave_0 entered promiscuous mode 18:45:39 executing program 5: perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x1f, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) r0 = socket(0xa, 0x1, 0x0) close(r0) socket$inet6_sctp(0xa, 0x10000000005, 0x84) setsockopt$inet_sctp_SCTP_MAX_BURST(r0, 0x84, 0x14, &(0x7f0000000000), 0x4) [ 58.996865][ T8150] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.004623][ T8150] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.013090][ T8150] device bridge_slave_1 entered promiscuous mode [ 59.020870][ T8147] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 59.131820][ T8147] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.201405][ T8147] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.241852][ T8150] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.261899][ T8160] IPVS: ftp: loaded support on port[0] = 21 [ 59.288404][ T8150] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.297719][ T8157] IPVS: ftp: loaded support on port[0] = 21 [ 59.348892][ T8150] team0: Port device team_slave_0 added [ 59.387201][ T8150] team0: Port device team_slave_1 added [ 59.530139][ T8150] device hsr_slave_0 entered promiscuous mode [ 59.587929][ T8150] device hsr_slave_1 entered promiscuous mode [ 59.647650][ T8150] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.658139][ T8155] chnl_net:caif_netlink_parms(): no params data found [ 59.668256][ T8152] chnl_net:caif_netlink_parms(): no params data found [ 59.755579][ T8152] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.763180][ T8152] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.772026][ T8152] device bridge_slave_0 entered promiscuous mode [ 59.779388][ T8155] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.786853][ T8155] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.797071][ T8155] device bridge_slave_0 entered promiscuous mode [ 59.842000][ T8152] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.849569][ T8152] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.857408][ T8152] device bridge_slave_1 entered promiscuous mode [ 59.871678][ T8155] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.880380][ T8155] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.890296][ T8155] device bridge_slave_1 entered promiscuous mode [ 59.897405][ T8150] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 59.962573][ T8160] chnl_net:caif_netlink_parms(): no params data found [ 59.984783][ T8150] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 60.031519][ T8150] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 60.092338][ T8150] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 60.155089][ T8152] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.174784][ T8152] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.191700][ T8155] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.213560][ T8157] chnl_net:caif_netlink_parms(): no params data found [ 60.237259][ T8155] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.258927][ T8155] team0: Port device team_slave_0 added [ 60.278151][ T8152] team0: Port device team_slave_0 added [ 60.284403][ T8160] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.292425][ T8160] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.300654][ T8160] device bridge_slave_0 entered promiscuous mode [ 60.313237][ T8155] team0: Port device team_slave_1 added [ 60.325507][ T8152] team0: Port device team_slave_1 added [ 60.333608][ T8160] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.341178][ T8160] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.349243][ T8160] device bridge_slave_1 entered promiscuous mode [ 60.373776][ T8160] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.399236][ T8160] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.470324][ T8152] device hsr_slave_0 entered promiscuous mode [ 60.508015][ T8152] device hsr_slave_1 entered promiscuous mode [ 60.548164][ T8152] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.564413][ T8147] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.577661][ T8157] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.585666][ T8157] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.594723][ T8157] device bridge_slave_0 entered promiscuous mode [ 60.650311][ T8155] device hsr_slave_0 entered promiscuous mode [ 60.697887][ T8155] device hsr_slave_1 entered promiscuous mode [ 60.759537][ T8155] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.785447][ T8157] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.793730][ T8157] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.802802][ T8157] device bridge_slave_1 entered promiscuous mode [ 60.826686][ T8157] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.843877][ T8160] team0: Port device team_slave_0 added [ 60.852259][ T8157] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.875173][ T8152] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.940309][ T8160] team0: Port device team_slave_1 added [ 60.963556][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.971767][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.983165][ T8147] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.991527][ T8152] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 61.054833][ T8152] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 61.099267][ T8152] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 61.159307][ T8157] team0: Port device team_slave_0 added [ 61.220003][ T8160] device hsr_slave_0 entered promiscuous mode [ 61.257797][ T8160] device hsr_slave_1 entered promiscuous mode [ 61.317798][ T8160] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.331045][ T8155] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 61.372674][ T8157] team0: Port device team_slave_1 added [ 61.380467][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.389781][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.398930][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.406280][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.414422][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.423944][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.433306][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.440676][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.454416][ T8150] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.479613][ T8155] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 61.501448][ T8155] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 61.549018][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.556968][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.565984][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.574888][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.584843][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.595171][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.607764][ T8166] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.616435][ T8166] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.641494][ T8155] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 61.714933][ T8150] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.760483][ T8157] device hsr_slave_0 entered promiscuous mode [ 61.807928][ T8157] device hsr_slave_1 entered promiscuous mode [ 61.847619][ T8157] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.855512][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.863715][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.871432][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.879986][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.888945][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.897557][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.906173][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.913270][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.921096][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.929763][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.938184][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.945212][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.952813][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.966114][ T8147] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 61.979388][ T8147] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.987073][ T8160] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 62.049016][ T8160] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 62.102695][ T8160] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 62.159197][ T8160] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 62.200550][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 62.209303][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.217383][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 62.249963][ T8147] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.257052][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.264830][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.291247][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 62.300897][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 62.310270][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.318803][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 62.327113][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.336104][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.353921][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 62.362382][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.385582][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 62.394635][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.411897][ T8150] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.430281][ T8157] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 62.489576][ T8157] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 62.535486][ T8152] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.561474][ T8157] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 167.587440][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 167.594293][ C1] rcu: 1-...!: (10499 ticks this GP) idle=9a6/1/0x4000000000000002 softirq=12286/12286 fqs=0 [ 167.604771][ C1] (t=10500 jiffies g=6129 q=70) [ 167.609696][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g6129 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 167.620786][ C1] rcu: RCU grace-period kthread stack dump: [ 167.626670][ C1] rcu_preempt R running task 28864 10 2 0x80004000 [ 167.634564][ C1] Call Trace: [ 167.637860][ C1] __schedule+0x9a0/0xcc0 [ 167.642201][ C1] schedule+0x181/0x210 [ 167.646352][ C1] schedule_timeout+0x14f/0x240 [ 167.651201][ C1] ? run_local_timers+0x120/0x120 [ 167.656218][ C1] rcu_gp_kthread+0xed8/0x1770 [ 167.660977][ C1] kthread+0x332/0x350 [ 167.665028][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 167.670123][ C1] ? kthread_blkcg+0xe0/0xe0 [ 167.674703][ C1] ret_from_fork+0x24/0x30 [ 167.679126][ C1] NMI backtrace for cpu 1 [ 167.683445][ C1] CPU: 1 PID: 8168 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 167.691658][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.701696][ C1] Call Trace: [ 167.704974][ C1] [ 167.707822][ C1] dump_stack+0x1fb/0x318 [ 167.712140][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 167.717494][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 167.723898][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 167.729951][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 167.736022][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 167.742826][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 167.747937][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 167.753129][ C1] ? trace_hardirqs_off+0x74/0x80 [ 167.758156][ C1] update_process_times+0x12d/0x180 [ 167.763371][ C1] tick_sched_timer+0x263/0x420 [ 167.768222][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 167.773777][ C1] __hrtimer_run_queues+0x403/0x840 [ 167.778998][ C1] hrtimer_interrupt+0x38c/0xda0 [ 167.783960][ C1] ? debug_smp_processor_id+0x9/0x20 [ 167.789248][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 167.794802][ C1] apic_timer_interrupt+0xf/0x20 [ 167.799739][ C1] [ 167.802684][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 167.808850][ 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 [ 167.828456][ C1] RSP: 0018:ffffc90002177c38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 167.836860][ C1] RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff8880a8f34140 [ 167.844945][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00029dda00 [ 167.852970][ C1] RBP: ffffc90002177c60 R08: dffffc0000000000 R09: fffffbfff12877ed [ 167.860952][ C1] R10: fffffbfff12877ed R11: 0000000000000000 R12: dffffc0000000000 [ 167.868926][ C1] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff888096c3b428 [ 167.876915][ C1] ? mod_memcg_page_state+0x123/0x190 [ 167.882291][ C1] ? free_thread_stack+0x124/0x590 [ 167.887387][ C1] ? mod_memcg_page_state+0x123/0x190 [ 167.892834][ C1] free_thread_stack+0x168/0x590 [ 167.897785][ C1] put_task_stack+0xa3/0x130 [ 167.902372][ C1] finish_task_switch+0x3f1/0x550 [ 167.908872][ C1] __schedule+0x9a8/0xcc0 [ 167.913223][ C1] ? ___preempt_schedule+0x16/0x18 [ 167.918331][ C1] preempt_schedule+0xdb/0x120 [ 167.923154][ C1] ___preempt_schedule+0x16/0x18 [ 167.928092][ C1] ? do_group_exit+0x2a8/0x2b0 [ 167.932857][ C1] _raw_spin_unlock_irq+0x77/0x80 [ 167.937873][ C1] do_group_exit+0x2a8/0x2b0 [ 167.942484][ C1] __do_sys_exit_group+0x17/0x20 [ 167.947456][ C1] __se_sys_exit_group+0x14/0x20 [ 167.952419][ C1] __x64_sys_exit_group+0x3b/0x40 [ 167.957436][ C1] do_syscall_64+0xf7/0x1c0 [ 167.961930][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 167.967919][ C1] RIP: 0033:0x45a679 [ 167.971822][ 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 [ 167.991426][ C1] RSP: 002b:00007ffe2c83fca8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 167.999857][ C1] RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045a679 [ 168.007943][ C1] RDX: 0000000000414211 RSI: fffffffffffffff7 RDI: 0000000000000000 [ 168.015923][ C1] RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffe2c83fd00 [ 168.023898][ C1] R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 [ 168.031873][ C1] R13: 00007ffe2c83fd00 R14: 0000000000000000 R15: 00007ffe2c83fd10