[ 41.406968][ T25] audit: type=1800 audit(1575402128.436:26): pid=7948 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 41.432095][ T25] audit: type=1800 audit(1575402128.436:27): pid=7948 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 41.452210][ T25] audit: type=1800 audit(1575402128.436:28): pid=7948 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. [ 42.230315][ T25] audit: type=1800 audit(1575402129.266:29): pid=7948 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 '10.128.1.6' (ECDSA) to the list of known hosts. 2019/12/03 19:42:16 fuzzer started 2019/12/03 19:42:18 dialing manager at 10.128.0.26:42111 2019/12/03 19:42:18 syscalls: 2689 2019/12/03 19:42:18 code coverage: enabled 2019/12/03 19:42:18 comparison tracing: enabled 2019/12/03 19:42:18 extra coverage: extra coverage is not supported by the kernel 2019/12/03 19:42:18 setuid sandbox: enabled 2019/12/03 19:42:18 namespace sandbox: enabled 2019/12/03 19:42:18 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 19:42:18 fault injection: enabled 2019/12/03 19:42:18 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 19:42:18 net packet injection: enabled 2019/12/03 19:42:18 net device setup: enabled 2019/12/03 19:42:18 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 19:42:18 devlink PCI setup: PCI device 0000:00:10.0 is not available 19:42:19 executing program 0: perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x3ea, 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_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) r0 = openat$rdma_cm(0xffffffffffffff9c, &(0x7f0000000440)='/dev/infiniband/rdma_cm\x00', 0x2, 0x0) write$RDMA_USER_CM_CMD_CREATE_ID(r0, &(0x7f0000000540)={0x0, 0x18, 0xfa00, {0x0, &(0x7f0000000380)={0xffffffffffffffff}, 0x13f}}, 0x20) write$RDMA_USER_CM_CMD_SET_OPTION(r0, &(0x7f0000000280)={0xe, 0x18, 0xfa00, @id_resuseaddr={&(0x7f00000002c0)=0x1, r1, 0x0, 0x1, 0x4}}, 0x20) 19:42:19 executing program 1: r0 = memfd_create(&(0x7f0000000200)='eth0\x00', 0x0) write(r0, &(0x7f0000000040)="06", 0x1) mmap(&(0x7f0000000000/0x7000)=nil, 0x7000, 0x1, 0x11, r0, 0x0) r1 = socket$inet_dccp(0x2, 0x6, 0x0) getsockopt$inet_int(r1, 0x10d, 0xe8, 0x0, &(0x7f0000000000)) syzkaller login: [ 52.443353][ T8114] IPVS: ftp: loaded support on port[0] = 21 [ 52.584169][ T8114] chnl_net:caif_netlink_parms(): no params data found [ 52.613056][ T8117] IPVS: ftp: loaded support on port[0] = 21 19:42:19 executing program 2: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) r1 = fcntl$dupfd(r0, 0x0, r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) bpf$PROG_LOAD(0x5, &(0x7f000000e000)={0x3, 0x4, &(0x7f0000000040)=@framed={{0xffffffb4, 0x5, 0x0, 0x0, 0x0, 0x61, 0x10, 0x4c}, [@ldst={0x5, 0x3, 0x5}]}, &(0x7f0000003ff6)='G\x00', 0x5, 0xfd90, &(0x7f000000cf3d)=""/195, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x39f, 0x10, &(0x7f0000000000), 0x1}, 0x48) [ 52.648777][ T8114] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.670836][ T8114] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.678792][ T8114] device bridge_slave_0 entered promiscuous mode [ 52.697453][ T8114] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.706636][ T8114] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.714596][ T8114] device bridge_slave_1 entered promiscuous mode [ 52.794144][ T8114] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 52.815907][ T8120] IPVS: ftp: loaded support on port[0] = 21 [ 52.824127][ T8114] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 52.871580][ T8117] chnl_net:caif_netlink_parms(): no params data found [ 52.889718][ T8114] team0: Port device team_slave_0 added [ 52.918378][ T8114] team0: Port device team_slave_1 added [ 52.954602][ T8117] bridge0: port 1(bridge_slave_0) entered blocking state 19:42:20 executing program 3: perf_event_open(&(0x7f0000000100)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3c43, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xfffffffffffffffd, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}, 0x0, 0x0, 0x80, 0x0, 0x0, 0x1}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) ioctl$KVM_X86_GET_MCE_CAP_SUPPORTED(0xffffffffffffffff, 0x8008ae9d, &(0x7f0000000000)=""/81) r0 = syz_open_dev$video(&(0x7f0000000100)='/dev/video#\x00', 0x3, 0x0) ioctl$VIDIOC_S_FMT(r0, 0xc0d05605, &(0x7f0000000180)={0x1, @vbi={0x0, 0x0, 0x3432564e}}) [ 52.963366][ T8117] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.972208][ T8117] device bridge_slave_0 entered promiscuous mode [ 53.043363][ T8114] device hsr_slave_0 entered promiscuous mode [ 53.092813][ T8114] device hsr_slave_1 entered promiscuous mode [ 53.133539][ T8117] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.140630][ T8117] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.149169][ T8117] device bridge_slave_1 entered promiscuous mode 19:42:20 executing program 4: r0 = socket$netlink(0x10, 0x3, 0x0) r1 = socket$inet6_tcp(0xa, 0x1, 0x0) r2 = fcntl$dupfd(r1, 0x0, r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) sendmsg$nl_route(r0, &(0x7f0000000700)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000940)=ANY=[@ANYBLOB="3000000013000141520000000000000000f00000", @ANYRES32, @ANYBLOB="000000000000000008000d00ffffffff08001300", @ANYRES32], 0x30}}, 0x40000) [ 53.179430][ T8123] IPVS: ftp: loaded support on port[0] = 21 [ 53.234050][ T8120] chnl_net:caif_netlink_parms(): no params data found [ 53.268171][ T8117] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 53.291176][ T8114] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 53.342839][ T8114] netdevsim netdevsim0 netdevsim1: renamed from eth1 19:42:20 executing program 5: r0 = syz_open_dev$video4linux(&(0x7f0000000000)='/dev/v4l-subdev#\x00', 0x2, 0x0) ioctl$VIDIOC_SUBDEV_G_FMT(r0, 0xc0585604, &(0x7f0000000080)={0x1, 0x1}) [ 53.395527][ T8114] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 53.456317][ T8114] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 53.533419][ T8117] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 53.581765][ T8126] IPVS: ftp: loaded support on port[0] = 21 [ 53.595076][ T8120] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.603402][ T8120] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.611395][ T8120] device bridge_slave_0 entered promiscuous mode [ 53.619932][ T8117] team0: Port device team_slave_0 added [ 53.634736][ T8128] IPVS: ftp: loaded support on port[0] = 21 [ 53.649795][ T8120] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.658062][ T8120] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.665780][ T8120] device bridge_slave_1 entered promiscuous mode [ 53.673370][ T8117] team0: Port device team_slave_1 added [ 53.753565][ T8117] device hsr_slave_0 entered promiscuous mode [ 53.821013][ T8117] device hsr_slave_1 entered promiscuous mode [ 53.880906][ T8117] debugfs: Directory 'hsr0' with parent '/' already present! [ 53.905222][ T8120] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 53.944200][ T8120] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 53.998192][ T8117] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 54.045904][ T8117] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 54.104440][ T8117] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 54.163402][ T8117] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 54.238652][ T8120] team0: Port device team_slave_0 added [ 54.248315][ T8120] team0: Port device team_slave_1 added [ 54.256649][ T8126] chnl_net:caif_netlink_parms(): no params data found [ 54.290532][ T8126] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.298118][ T8126] bridge0: port 1(bridge_slave_0) entered disabled state [ 54.305918][ T8126] device bridge_slave_0 entered promiscuous mode [ 54.326082][ T8123] chnl_net:caif_netlink_parms(): no params data found [ 54.342996][ T8126] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.350074][ T8126] bridge0: port 2(bridge_slave_1) entered disabled state [ 54.357960][ T8126] device bridge_slave_1 entered promiscuous mode [ 54.413404][ T8120] device hsr_slave_0 entered promiscuous mode [ 54.460973][ T8120] device hsr_slave_1 entered promiscuous mode [ 54.510842][ T8120] debugfs: Directory 'hsr0' with parent '/' already present! [ 54.527196][ T8114] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.544549][ T8126] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 54.566102][ T8126] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 54.600238][ T3686] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.608254][ T3686] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.617575][ T8114] 8021q: adding VLAN 0 to HW filter on device team0 [ 54.641703][ T8128] chnl_net:caif_netlink_parms(): no params data found [ 54.668897][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 54.678104][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 54.687217][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.694373][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.702117][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 54.710473][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 54.719118][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.726184][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.744018][ T8123] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.751568][ T8123] bridge0: port 1(bridge_slave_0) entered disabled state [ 54.759158][ T8123] device bridge_slave_0 entered promiscuous mode [ 54.767871][ T8126] team0: Port device team_slave_0 added [ 54.778361][ T8126] team0: Port device team_slave_1 added [ 54.785209][ T8120] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 54.822341][ T8122] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 54.830578][ T8122] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 54.844283][ T8123] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.852644][ T8123] bridge0: port 2(bridge_slave_1) entered disabled state [ 54.860177][ T8123] device bridge_slave_1 entered promiscuous mode [ 54.881786][ T8120] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 54.958250][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 54.975937][ T8120] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 55.017643][ T8128] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.025080][ T8128] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.033561][ T8128] device bridge_slave_0 entered promiscuous mode [ 55.043005][ T8123] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.093840][ T8126] device hsr_slave_0 entered promiscuous mode [ 55.151514][ T8126] device hsr_slave_1 entered promiscuous mode [ 55.190956][ T8126] debugfs: Directory 'hsr0' with parent '/' already present! [ 55.202194][ T8120] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 55.256316][ T8128] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.264297][ T8128] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.272365][ T8128] device bridge_slave_1 entered promiscuous mode [ 55.289670][ T8128] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.301490][ T8123] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.312083][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 55.320509][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 55.330207][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 55.348836][ T8122] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 55.357206][ T8122] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 55.366393][ T8128] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.390431][ T3686] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 55.402008][ T3686] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 55.431993][ T8114] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 55.443809][ T8114] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 55.459381][ T8123] team0: Port device team_slave_0 added [ 55.469372][ T3686] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 55.477572][ T3686] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 55.494044][ T8117] 8021q: adding VLAN 0 to HW filter on device bond0 [ 55.507535][ T8128] team0: Port device team_slave_0 added [ 55.514585][ T8123] team0: Port device team_slave_1 added [ 55.522458][ T8128] team0: Port device team_slave_1 added [ 55.593678][ T8128] device hsr_slave_0 entered promiscuous mode [ 55.651501][ T8128] device hsr_slave_1 entered promiscuous mode [ 55.700910][ T8128] debugfs: Directory 'hsr0' with parent '/' already present! [ 55.712309][ T8114] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 55.738606][ T8117] 8021q: adding VLAN 0 to HW filter on device team0 [ 55.756197][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 55.764890][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 55.772374][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 55.780110][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 55.788459][ T8126] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 55.833121][ T8126] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 55.873509][ T8126] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 55.978261][ T8120] 8021q: adding VLAN 0 to HW filter on device bond0 [ 56.006700][ T8120] 8021q: adding VLAN 0 to HW filter on device team0 [ 56.053580][ T8120] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 56.069381][ T8120] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 56.112919][ T8120] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 160.960693][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 160.967481][ C1] rcu: 1-...!: (10499 ticks this GP) idle=e5e/1/0x4000000000000002 softirq=10154/10154 fqs=40 [ 160.978038][ C1] (t=10501 jiffies g=5957 q=405) [ 160.983052][ C1] rcu: rcu_preempt kthread starved for 10422 jiffies! g5957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 160.994136][ C1] rcu: RCU grace-period kthread stack dump: [ 161.000013][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 161.007902][ C1] Call Trace: [ 161.011187][ C1] __schedule+0x9a0/0xcc0 [ 161.015515][ C1] schedule+0x181/0x210 [ 161.019663][ C1] schedule_timeout+0x14f/0x240 [ 161.024503][ C1] ? run_local_timers+0x120/0x120 [ 161.029519][ C1] rcu_gp_kthread+0xed8/0x1770 [ 161.034281][ C1] kthread+0x332/0x350 [ 161.038335][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 161.043434][ C1] ? kthread_blkcg+0xe0/0xe0 [ 161.048029][ C1] ret_from_fork+0x24/0x30 [ 161.052451][ C1] NMI backtrace for cpu 1 [ 161.056768][ C1] CPU: 1 PID: 8084 Comm: udevd Not tainted 5.4.0-syzkaller #0 [ 161.064205][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 161.074243][ C1] Call Trace: [ 161.077512][ C1] [ 161.080350][ C1] dump_stack+0x1fb/0x318 [ 161.084670][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 161.089507][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 161.095653][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 161.101704][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 161.107673][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 161.113551][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 161.118668][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 161.123890][ C1] ? trace_hardirqs_off+0x74/0x80 [ 161.128914][ C1] update_process_times+0x12d/0x180 [ 161.134108][ C1] tick_sched_timer+0x263/0x420 [ 161.138960][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 161.144499][ C1] __hrtimer_run_queues+0x403/0x840 [ 161.149704][ C1] hrtimer_interrupt+0x38c/0xda0 [ 161.154647][ C1] ? debug_smp_processor_id+0x9/0x20 [ 161.159924][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 161.165459][ C1] apic_timer_interrupt+0xf/0x20 [ 161.171597][ C1] [ 161.174526][ C1] RIP: 0010:free_thread_stack+0x11f/0x590 [ 161.180234][ C1] Code: 3e e8 e5 96 ee ff 48 c1 e8 06 48 83 e0 c0 48 bf 00 00 00 00 00 ea ff ff 48 01 c7 be 03 00 00 00 e8 06 a2 60 00 e9 5d 04 00 00 5c 2d 2e 00 48 89 df 31 f6 e8 42 af 6e 00 43 80 3c 2e 00 74 08 [ 161.199931][ C1] RSP: 0018:ffffc90001ae7a88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 161.208358][ C1] RAX: 1ffff11012b9f641 RBX: ffffea0002633700 RCX: ffff8880a88b4100 [ 161.216327][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002633700 [ 161.224293][ C1] RBP: ffffc90001ae7ac0 R08: 000000000003a768 R09: ffffed1012e65a7f [ 161.232256][ C1] R10: ffffed1012e65a7f R11: 0000000000000000 R12: ffff888095cfb2a0 [ 161.240223][ C1] R13: dffffc0000000000 R14: 1ffff11012b9f654 R15: ffff88809732d3e8 [ 161.248234][ C1] ? free_thread_stack+0x168/0x590 [ 161.253338][ C1] put_task_stack+0xa3/0x130 [ 161.257919][ C1] finish_task_switch+0x3f1/0x550 [ 161.262938][ C1] __schedule+0x9a8/0xcc0 [ 161.267263][ C1] ? ___preempt_schedule+0x16/0x18 [ 161.272363][ C1] preempt_schedule+0xdb/0x120 [ 161.277113][ C1] ___preempt_schedule+0x16/0x18 [ 161.282130][ C1] ? debug_object_active_state+0x1e3/0x4a0 [ 161.287929][ C1] _raw_spin_unlock_irqrestore+0xcc/0xe0 [ 161.293547][ C1] debug_object_active_state+0x1e3/0x4a0 [ 161.299194][ C1] ? debug_object_activate+0x185/0x6f0 [ 161.304656][ C1] ? __fput+0x740/0x740 [ 161.308802][ C1] __call_rcu+0x55/0x670 [ 161.313064][ C1] ? percpu_counter_add_batch+0x153/0x170 [ 161.318785][ C1] call_rcu+0xb/0x10 [ 161.322674][ C1] __fput+0x581/0x740 [ 161.326654][ C1] ____fput+0x15/0x20 [ 161.330626][ C1] task_work_run+0x17e/0x1b0 [ 161.335211][ C1] prepare_exit_to_usermode+0x483/0x5b0 [ 161.340751][ C1] syscall_return_slowpath+0x113/0x4a0 [ 161.346198][ C1] do_syscall_64+0x11f/0x1c0 [ 161.350778][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 161.356657][ C1] RIP: 0033:0x7f700ea1e2b0 [ 161.361062][ C1] Code: 40 75 0b 31 c0 48 83 c4 08 e9 0c ff ff ff 48 8d 3d c5 32 08 00 e8 c0 07 02 00 83 3d 45 a3 2b 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ce 8a 01 00 48 89 04 24 [ 161.380657][ C1] RSP: 002b:00007fff73079b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 161.389065][ C1] RAX: 0000000000000000 RBX: 0000000001a0a250 RCX: 00007f700ea1e2b0 [ 161.397046][ C1] RDX: 00007fff7307cd70 RSI: 0000000000000002 RDI: 0000000000000007 [ 161.405007][ C1] RBP: 0000000000625500 R08: 00007fff73079b00 R09: 00007fff731340b8 [ 161.412967][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff73079bf0 [ 161.420926][ C1] R13: 0000000000000001 R14: 00007fff73079b84 R15: 0000000001a0a250