[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 49.446109][ T23] audit: type=1800 audit(1575361351.838:25): pid=8371 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 49.465588][ T23] audit: type=1800 audit(1575361351.838:26): pid=8371 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 49.515160][ T23] audit: type=1800 audit(1575361351.838:27): pid=8371 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 '10.128.15.195' (ECDSA) to the list of known hosts. 2019/12/03 08:22:43 fuzzer started 2019/12/03 08:22:45 dialing manager at 10.128.0.26:38907 2019/12/03 08:22:45 syscalls: 2697 2019/12/03 08:22:45 code coverage: enabled 2019/12/03 08:22:45 comparison tracing: enabled 2019/12/03 08:22:45 extra coverage: extra coverage is not supported by the kernel 2019/12/03 08:22:45 setuid sandbox: enabled 2019/12/03 08:22:45 namespace sandbox: enabled 2019/12/03 08:22:45 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 08:22:45 fault injection: enabled 2019/12/03 08:22:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 08:22:45 net packet injection: enabled 2019/12/03 08:22:45 net device setup: enabled 2019/12/03 08:22:45 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 08:22:45 devlink PCI setup: PCI device 0000:00:10.0 is not available 08:22:46 executing program 0: perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0xeb, 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, 0x0, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x0) r0 = socket$inet6_sctp(0xa, 0x5, 0x84) r1 = socket$inet6_sctp(0xa, 0x5, 0x84) setsockopt$inet_sctp6_SCTP_EVENTS(r1, 0x84, 0xb, &(0x7f0000000040)={0x0, 0x3}, 0xb) shutdown(r1, 0x0) getsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX3(r1, 0x84, 0x6f, &(0x7f0000000000)={0x0, 0x10, &(0x7f00000002c0)=[@in={0x2, 0x0, @local}]}, &(0x7f0000000180)=0x10) r2 = socket$inet(0x2, 0x80001, 0x84) getsockopt$inet_sctp_SCTP_MAX_BURST(r2, 0x84, 0x14, &(0x7f0000000000)=@assoc_value={0x0}, &(0x7f0000000040)=0x8) getsockopt$inet_sctp6_SCTP_DEFAULT_PRINFO(r0, 0x84, 0x72, &(0x7f0000000300)={r3}, &(0x7f0000000340)=0xc) 08:22:46 executing program 1: r0 = syz_open_dev$dri(&(0x7f00000002c0)='/dev/dri/card#\x00', 0x0, 0x0) r1 = syz_open_dev$dri(0x0, 0x0, 0x0) dup3(r0, r1, 0x0) syzkaller login: [ 64.510615][ T8535] IPVS: ftp: loaded support on port[0] = 21 [ 64.664505][ T8535] chnl_net:caif_netlink_parms(): no params data found [ 64.722358][ T8535] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.730696][ T8535] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.740461][ T8535] device bridge_slave_0 entered promiscuous mode [ 64.750556][ T8535] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.758093][ T8535] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.768145][ T8535] device bridge_slave_1 entered promiscuous mode [ 64.797829][ T8535] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.811618][ T8535] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.832849][ T8538] IPVS: ftp: loaded support on port[0] = 21 08:22:47 executing program 2: sendmsg$nl_netfilter(0xffffffffffffffff, &(0x7f0000d65000)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000080)=ANY=[@ANYBLOB="14038300f7"], 0x5}}, 0x0) socketpair$unix(0x1, 0x1, 0x0, &(0x7f00000015c0)={0xffffffffffffffff, 0xffffffffffffffff}) r1 = socket(0x200000000000011, 0x3, 0x0) ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f00000001c0)={'bridge_slave_0\x00', 0x0}) bind$packet(r1, &(0x7f0000000200)={0x11, 0x0, r2}, 0x14) setsockopt$packet_int(r1, 0x107, 0xf, &(0x7f0000000000)=0x7, 0x4) io_setup(0x2, &(0x7f0000000240)=0x0) openat$ipvs(0xffffffffffffff9c, &(0x7f00000000c0)='/proc/sys/net/ipv4/vs/sync_persist_mode\x00', 0x2, 0x0) io_submit(r3, 0x1, &(0x7f0000000180)=[&(0x7f0000000040)={0x0, 0x0, 0x0, 0x100000000001, 0x0, r1, &(0x7f0000000080), 0x2d3}]) [ 64.844538][ T8535] team0: Port device team_slave_0 added [ 64.852463][ T8535] team0: Port device team_slave_1 added [ 64.974451][ T8535] device hsr_slave_0 entered promiscuous mode [ 65.030288][ T8535] device hsr_slave_1 entered promiscuous mode 08:22:47 executing program 3: recvmmsg(0xffffffffffffffff, &(0x7f0000001340)=[{{0x0, 0x0, 0x0}, 0x8}], 0x1, 0x0, 0x0) r0 = syz_open_procfs(0x0, &(0x7f0000000140)='net/mcfilter\x00') preadv(r0, &(0x7f0000000480), 0x10000000000002a1, 0x10400003) [ 65.095659][ T8541] IPVS: ftp: loaded support on port[0] = 21 [ 65.197185][ T8535] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 65.254810][ T8535] netdevsim netdevsim0 netdevsim1: renamed from eth1 08:22:47 executing program 4: r0 = socket$inet6(0xa, 0x80003, 0x6c) bind$inet6(r0, &(0x7f0000000000)={0xa, 0x0, 0x0, @local}, 0x1c) [ 65.336779][ T8535] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 65.412602][ T8538] chnl_net:caif_netlink_parms(): no params data found [ 65.428234][ T8535] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 65.494645][ T8544] IPVS: ftp: loaded support on port[0] = 21 [ 65.569212][ T8535] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.576372][ T8535] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.584664][ T8535] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.592212][ T8535] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.642901][ T8538] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.661847][ T8538] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.680094][ T8538] device bridge_slave_0 entered promiscuous mode 08:22:48 executing program 5: r0 = socket$nl_generic(0x10, 0x3, 0x10) r1 = syz_genetlink_get_family_id$team(&(0x7f00000000c0)='team\x00') sendmsg$TEAM_CMD_OPTIONS_GET(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000180)={0x14, r1, 0xa05, 0x0, 0x0, {0x3, 0x400300}}, 0x14}}, 0x0) [ 65.721138][ T8546] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.742091][ T8546] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.766427][ T8538] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.774291][ T8538] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.784773][ T8538] device bridge_slave_1 entered promiscuous mode [ 65.791503][ T8547] IPVS: ftp: loaded support on port[0] = 21 [ 65.874242][ T8538] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 65.934254][ T8538] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 65.961363][ T8541] chnl_net:caif_netlink_parms(): no params data found [ 65.981517][ T8538] team0: Port device team_slave_0 added [ 66.022026][ T8550] IPVS: ftp: loaded support on port[0] = 21 [ 66.038323][ T8541] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.045963][ T8541] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.054189][ T8541] device bridge_slave_0 entered promiscuous mode [ 66.064467][ T8538] team0: Port device team_slave_1 added [ 66.101086][ T8541] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.108281][ T8541] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.117377][ T8541] device bridge_slave_1 entered promiscuous mode [ 66.147330][ T8547] chnl_net:caif_netlink_parms(): no params data found [ 66.233014][ T8538] device hsr_slave_0 entered promiscuous mode [ 66.299588][ T8538] device hsr_slave_1 entered promiscuous mode [ 66.349322][ T8538] debugfs: Directory 'hsr0' with parent '/' already present! [ 66.373524][ T8541] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.387304][ T8541] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.428122][ T8544] chnl_net:caif_netlink_parms(): no params data found [ 66.447898][ T8535] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.505745][ T8544] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.514263][ T8544] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.522742][ T8544] device bridge_slave_0 entered promiscuous mode [ 66.532242][ T8541] team0: Port device team_slave_0 added [ 66.539970][ T8547] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.547050][ T8547] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.556111][ T8547] device bridge_slave_0 entered promiscuous mode [ 66.567470][ T8547] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.574865][ T8547] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.584095][ T8547] device bridge_slave_1 entered promiscuous mode [ 66.595737][ T8541] team0: Port device team_slave_1 added [ 66.602537][ T8544] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.610691][ T8544] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.618706][ T8544] device bridge_slave_1 entered promiscuous mode [ 66.641831][ T8544] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.665594][ T8547] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.684722][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 66.693686][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.705786][ T8544] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.722749][ T8535] 8021q: adding VLAN 0 to HW filter on device team0 [ 66.748437][ T8547] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.764154][ T8538] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 66.801922][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.810818][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.820038][ T8546] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.827364][ T8546] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.891098][ T8541] device hsr_slave_0 entered promiscuous mode [ 66.939682][ T8541] device hsr_slave_1 entered promiscuous mode [ 66.979261][ T8541] debugfs: Directory 'hsr0' with parent '/' already present! [ 66.998895][ T8538] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 67.041338][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 67.052582][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 67.061496][ T8546] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.069114][ T8546] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.120862][ T8544] team0: Port device team_slave_0 added [ 67.131145][ T8547] team0: Port device team_slave_0 added [ 67.138484][ T8538] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 67.172159][ T8538] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 67.215429][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 67.224520][ T8550] chnl_net:caif_netlink_parms(): no params data found [ 67.234827][ T8544] team0: Port device team_slave_1 added [ 67.244041][ T8547] team0: Port device team_slave_1 added [ 67.268491][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 67.277238][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 67.287291][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 67.322772][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 67.362488][ T8544] device hsr_slave_0 entered promiscuous mode [ 67.419718][ T8544] device hsr_slave_1 entered promiscuous mode [ 67.459260][ T8544] debugfs: Directory 'hsr0' with parent '/' already present! [ 67.483586][ T8541] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 67.562469][ T8550] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.569770][ T8550] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.577678][ T8550] device bridge_slave_0 entered promiscuous mode [ 67.632338][ T8547] device hsr_slave_0 entered promiscuous mode [ 67.659450][ T8547] device hsr_slave_1 entered promiscuous mode [ 67.709257][ T8547] debugfs: Directory 'hsr0' with parent '/' already present! [ 67.716934][ T8541] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 67.761423][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 67.771958][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 67.796048][ T8550] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.804127][ T8550] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.813098][ T8550] device bridge_slave_1 entered promiscuous mode [ 67.831223][ T8541] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 67.883554][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 67.894088][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 67.904225][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 67.914001][ T8546] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 67.923732][ T8535] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 67.951561][ T8541] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 68.005892][ T8550] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 68.017646][ T8550] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 68.044323][ T8544] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 68.138032][ T8538] 8021q: adding VLAN 0 to HW filter on device bond0 [ 68.146281][ T8544] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 68.222226][ T8544] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 68.270954][ T8544] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 68.346610][ T8547] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 68.390746][ T8547] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 68.448726][ T8535] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 68.458503][ T8550] team0: Port device team_slave_0 added [ 68.466117][ T8550] team0: Port device team_slave_1 added [ 68.477144][ T8547] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 68.523020][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 68.530747][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 68.602191][ T8550] device hsr_slave_0 entered promiscuous mode [ 68.649760][ T8550] device hsr_slave_1 entered promiscuous mode [ 68.719210][ T8550] debugfs: Directory 'hsr0' with parent '/' already present! [ 68.741572][ T8547] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 68.793537][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 68.807301][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 68.835575][ T8538] 8021q: adding VLAN 0 to HW filter on device team0 [ 68.931544][ T8544] 8021q: adding VLAN 0 to HW filter on device bond0 [ 68.956120][ T8544] 8021q: adding VLAN 0 to HW filter on device team0 [ 69.018666][ T8544] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 69.039204][ T8544] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 69.085737][ T8544] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 173.829000][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 173.836717][ C1] rcu: 1-...!: (10499 ticks this GP) idle=9ce/1/0x4000000000000002 softirq=12493/12494 fqs=39 [ 173.847937][ C1] (t=10500 jiffies g=7301 q=638) [ 173.853155][ C1] rcu: rcu_preempt kthread starved for 10415 jiffies! g7301 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 173.865441][ C1] rcu: RCU grace-period kthread stack dump: [ 173.871727][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 173.880159][ C1] Call Trace: [ 173.883458][ C1] __schedule+0x9a0/0xcc0 [ 173.887924][ C1] schedule+0x181/0x210 [ 173.892096][ C1] schedule_timeout+0x14f/0x240 [ 173.897199][ C1] ? run_local_timers+0x120/0x120 [ 173.903280][ C1] rcu_gp_kthread+0xed8/0x1770 [ 173.908804][ C1] kthread+0x332/0x350 [ 173.913091][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 173.918244][ C1] ? kthread_blkcg+0xe0/0xe0 [ 173.923092][ C1] ret_from_fork+0x24/0x30 [ 173.927543][ C1] NMI backtrace for cpu 1 [ 173.931997][ C1] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.4.0-syzkaller #0 [ 173.939911][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 173.950289][ C1] Workqueue: 0x0 (gid-cache-wq) [ 173.955311][ C1] Call Trace: [ 173.958589][ C1] [ 173.961467][ C1] dump_stack+0x1fb/0x318 [ 173.966407][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 173.971401][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 173.977591][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 173.983667][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 173.989748][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 173.995677][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 174.000839][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 174.006366][ C1] ? trace_hardirqs_off+0x74/0x80 [ 174.011430][ C1] update_process_times+0x12d/0x180 [ 174.016732][ C1] tick_sched_timer+0x263/0x420 [ 174.021583][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 174.027176][ C1] __hrtimer_run_queues+0x403/0x840 [ 174.032398][ C1] hrtimer_interrupt+0x38c/0xda0 [ 174.037462][ C1] ? debug_smp_processor_id+0x9/0x20 [ 174.042793][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 174.048478][ C1] apic_timer_interrupt+0xf/0x20 [ 174.053506][ C1] [ 174.056477][ C1] RIP: 0010:__memcg_kmem_uncharge+0x219/0x2e0 [ 174.062837][ C1] Code: 4b 0d 89 e8 59 97 00 00 bf 01 00 00 00 e8 2f e3 9b ff 65 8b 05 d4 fd 4a 7e 85 c0 74 53 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f <5d> c3 49 8d 5f 10 48 89 df be 08 00 00 00 e8 04 c1 fa ff 48 8b 45 [ 174.083002][ C1] RSP: 0018:ffffc90000cdfc20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 174.091435][ C1] RAX: 0000000000000001 RBX: ffffea000280d300 RCX: 0000000000000000 [ 174.099955][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000280d300 [ 174.107964][ C1] RBP: ffffc90000cdfc20 R08: dffffc0000000000 R09: fffffbfff120248a [ 174.116185][ C1] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff888091f4a3a0 [ 174.124568][ C1] R13: dffffc0000000000 R14: 1ffff110123e9474 R15: ffff88808fa516a8 [ 174.132694][ C1] free_thread_stack+0x12e/0x590 [ 174.138023][ C1] put_task_stack+0xa3/0x130 [ 174.142661][ C1] finish_task_switch+0x3f1/0x550 [ 174.147700][ C1] __schedule+0x9a8/0xcc0 [ 174.152201][ C1] schedule+0x181/0x210 [ 174.156532][ C1] worker_thread+0x10d6/0x1630 [ 174.161785][ C1] kthread+0x332/0x350 [ 174.166306][ C1] ? rcu_lock_release+0x30/0x30 [ 174.171376][ C1] ? kthread_blkcg+0xe0/0xe0 [ 174.176104][ C1] ret_from_fork+0x24/0x30