[ 43.062186][ T24] audit: type=1800 audit(1575358137.342:30): pid=7962 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.162' (ECDSA) to the list of known hosts. 2019/12/03 07:29:08 fuzzer started 2019/12/03 07:29:09 dialing manager at 10.128.0.26:38907 2019/12/03 07:29:09 syscalls: 2697 2019/12/03 07:29:09 code coverage: enabled 2019/12/03 07:29:09 comparison tracing: enabled 2019/12/03 07:29:09 extra coverage: extra coverage is not supported by the kernel 2019/12/03 07:29:09 setuid sandbox: enabled 2019/12/03 07:29:09 namespace sandbox: enabled 2019/12/03 07:29:09 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 07:29:09 fault injection: enabled 2019/12/03 07:29:09 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 07:29:09 net packet injection: enabled 2019/12/03 07:29:09 net device setup: enabled 2019/12/03 07:29:09 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 07:29:09 devlink PCI setup: PCI device 0000:00:10.0 is not available 07:29:10 executing program 0: perf_event_open(&(0x7f000025c000)={0x2, 0x70, 0x5aeb, 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$inet6_sctp(0xa, 0x5, 0x84) setsockopt$inet_sctp6_SCTP_EVENTS(r0, 0x84, 0xb, &(0x7f0000000040)={0x0, 0x3}, 0xb) shutdown(r0, 0x0) getsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX3(r0, 0x84, 0x6f, &(0x7f0000000000)={0x0, 0x10, &(0x7f00000002c0)=[@in={0x2, 0x0, @local}]}, &(0x7f0000000180)=0x10) r1 = socket$inet(0x2, 0x80001, 0x84) getsockopt$inet_sctp_SCTP_MAX_BURST(r1, 0x84, 0x14, &(0x7f0000000000)=@assoc_value={0x0}, &(0x7f0000000040)=0x8) getsockopt$inet_sctp6_SCTP_ASSOCINFO(r0, 0x84, 0x10, &(0x7f0000000100)={r2}, &(0x7f0000000140)=0x14) 07:29:11 executing program 1: r0 = socket$inet6(0xa, 0x1, 0x0) setsockopt$sock_int(r0, 0x1, 0x4000000200000002, &(0x7f0000000180)=0x2, 0x4) bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20, 0x0, @loopback}, 0x1c) setsockopt$inet6_int(r0, 0x29, 0x21, &(0x7f0000000040)=0x6, 0x4) sendto$inet6(r0, 0x0, 0x0, 0xfffffefffffff7be, &(0x7f0000000080)={0xa, 0x4e20, 0x87ef4195, @loopback}, 0x1c) syzkaller login: [ 56.739626][ T8125] IPVS: ftp: loaded support on port[0] = 21 [ 56.905815][ T8125] chnl_net:caif_netlink_parms(): no params data found 07:29:11 executing program 2: r0 = syz_open_dev$sndseq(&(0x7f0000000600)='/dev/snd/seq\x00', 0x0, 0x0) ioctl$SNDRV_SEQ_IOCTL_CREATE_PORT(r0, 0xc0a85320, &(0x7f0000068f50)={{0x80}, 'por\xff\a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1f\x00\x00\xff\xff\xff\xff\xff\xff\xff\xef\x00\x00\x03\xff\x00\x00\x00\x00\x00\x00\x12\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x00', 0xc3, 0x80003}) socketpair$unix(0x1, 0x3, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) r3 = fcntl$dupfd(r2, 0x0, r1) ioctl$PERF_EVENT_IOC_ENABLE(r3, 0x8912, 0x400200) r4 = openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080)='/dev/sequencer2\x00', 0x406, 0x0) r5 = dup2(r0, r4) read(r5, &(0x7f00000000c0)=""/85, 0x321) [ 56.949503][ T8125] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.958211][ T8125] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.967377][ T8125] device bridge_slave_0 entered promiscuous mode [ 56.976688][ T8125] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.985100][ T8125] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.993376][ T8125] device bridge_slave_1 entered promiscuous mode [ 57.045033][ T8128] IPVS: ftp: loaded support on port[0] = 21 [ 57.052179][ T8125] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.073562][ T8125] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.150930][ T8125] team0: Port device team_slave_0 added [ 57.171715][ T8130] IPVS: ftp: loaded support on port[0] = 21 [ 57.190950][ T8125] team0: Port device team_slave_1 added 07:29:11 executing program 3: r0 = socket$caif_stream(0x25, 0x1, 0x0) io_setup(0x1000, &(0x7f0000000080)=0x0) fcntl$setstatus(r0, 0x4, 0xc00) io_submit(r1, 0x1, &(0x7f0000000c80)=[&(0x7f0000000380)={0x300000000000000, 0x0, 0x0, 0x0, 0x0, r0, &(0x7f0000000240)="e1", 0x1}]) [ 57.251857][ T8125] device hsr_slave_0 entered promiscuous mode [ 57.290891][ T8125] device hsr_slave_1 entered promiscuous mode [ 57.442294][ T8128] chnl_net:caif_netlink_parms(): no params data found [ 57.464270][ T8133] IPVS: ftp: loaded support on port[0] = 21 [ 57.503134][ T8125] netdevsim netdevsim0 netdevsim0: renamed from eth0 07:29:11 executing program 4: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x3) setsockopt$sock_timeval(r0, 0x1, 0x14, &(0x7f0000000000)={0x0, 0x2710}, 0x10) ioctl$int_in(r0, 0x5452, &(0x7f0000000040)=0x400) readv(r0, &(0x7f0000000700)=[{&(0x7f0000000080)=""/95, 0x5f}], 0x1) [ 57.562986][ T8125] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 57.665124][ T8125] netdevsim netdevsim0 netdevsim2: renamed from eth2 07:29:12 executing program 5: r0 = socket$inet(0x2, 0x80001, 0x84) sendmmsg$inet_sctp(r0, &(0x7f00000032c0)=[{0x0, 0x0, 0x0, 0x0, &(0x7f0000000640)=[@sndinfo={0x20}, @sndrcv={0x20}], 0x50}], 0x1, 0x0) [ 57.757677][ T8125] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 57.852222][ T8128] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.859305][ T8128] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.873769][ T8128] device bridge_slave_0 entered promiscuous mode [ 57.893892][ T8135] IPVS: ftp: loaded support on port[0] = 21 [ 57.917990][ T8128] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.925651][ T8128] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.933654][ T8128] device bridge_slave_1 entered promiscuous mode [ 57.946460][ T8130] chnl_net:caif_netlink_parms(): no params data found [ 57.974448][ T8128] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.007163][ T8130] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.014477][ T8130] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.023224][ T8130] device bridge_slave_0 entered promiscuous mode [ 58.033702][ T8138] IPVS: ftp: loaded support on port[0] = 21 [ 58.043349][ T8128] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.064008][ T8130] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.072379][ T8130] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.080364][ T8130] device bridge_slave_1 entered promiscuous mode [ 58.107020][ T8128] team0: Port device team_slave_0 added [ 58.116900][ T8128] team0: Port device team_slave_1 added [ 58.128172][ T8130] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.155998][ T8130] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.210542][ T8130] team0: Port device team_slave_0 added [ 58.227154][ T8133] chnl_net:caif_netlink_parms(): no params data found [ 58.242262][ T8130] team0: Port device team_slave_1 added [ 58.281588][ T8128] device hsr_slave_0 entered promiscuous mode [ 58.350201][ T8128] device hsr_slave_1 entered promiscuous mode [ 58.419891][ T8128] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.532989][ T8130] device hsr_slave_0 entered promiscuous mode [ 58.600126][ T8130] device hsr_slave_1 entered promiscuous mode [ 58.639891][ T8130] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.661645][ T8133] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.669096][ T8133] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.677142][ T8133] device bridge_slave_0 entered promiscuous mode [ 58.685204][ T8133] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.692761][ T8133] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.700975][ T8133] device bridge_slave_1 entered promiscuous mode [ 58.719191][ T8133] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.795474][ T8133] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.818872][ T8135] chnl_net:caif_netlink_parms(): no params data found [ 58.830016][ T8128] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 58.884235][ T8128] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 58.958325][ T8128] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 58.999031][ T8128] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 59.043871][ T8133] team0: Port device team_slave_0 added [ 59.055425][ T8133] team0: Port device team_slave_1 added [ 59.061429][ T8138] chnl_net:caif_netlink_parms(): no params data found [ 59.074587][ T8125] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.151820][ T8133] device hsr_slave_0 entered promiscuous mode [ 59.200292][ T8133] device hsr_slave_1 entered promiscuous mode [ 59.249827][ T8133] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.268404][ T8130] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 59.312508][ T8130] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 59.351357][ T8135] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.358473][ T8135] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.367245][ T8135] device bridge_slave_0 entered promiscuous mode [ 59.397891][ T8125] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.407863][ T8130] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 59.451309][ T8135] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.458418][ T8135] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.466719][ T8135] device bridge_slave_1 entered promiscuous mode [ 59.474236][ T8138] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.482209][ T8138] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.491096][ T8138] device bridge_slave_0 entered promiscuous mode [ 59.505239][ T8143] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.515153][ T8143] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.533659][ T8130] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 59.601673][ T8138] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.608791][ T8138] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.620161][ T8138] device bridge_slave_1 entered promiscuous mode [ 59.627205][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.635891][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.644925][ T3711] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.652163][ T3711] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.660602][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 59.669227][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.678000][ T3711] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.685088][ T3711] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.693177][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 59.708994][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 59.745642][ T8133] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 59.814902][ T8133] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 59.872212][ T8133] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 59.912381][ T8135] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.925503][ T8135] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.954017][ T8135] team0: Port device team_slave_0 added [ 59.960601][ T8133] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 60.013444][ T8138] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.027927][ T8138] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.039334][ T8135] team0: Port device team_slave_1 added [ 60.057085][ T8139] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.114956][ T8135] device hsr_slave_0 entered promiscuous mode [ 60.160216][ T8135] device hsr_slave_1 entered promiscuous mode [ 60.199953][ T8135] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.239612][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.249231][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.258240][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.286126][ T8138] team0: Port device team_slave_0 added [ 60.299579][ T8138] team0: Port device team_slave_1 added [ 60.324614][ T8135] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 60.402542][ T8135] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 60.442248][ T8135] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 60.482691][ T8145] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.491857][ T8145] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.500747][ T8145] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.509290][ T8145] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.530895][ T8130] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.542235][ T8125] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.554457][ T8125] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.562599][ T8135] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 60.602635][ T8145] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.612619][ T8145] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.631793][ T8130] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.640905][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.648525][ T3711] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.692381][ T8138] device hsr_slave_0 entered promiscuous mode [ 60.732111][ T8138] device hsr_slave_1 entered promiscuous mode [ 60.769867][ T8138] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.797654][ T8125] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.809366][ T8128] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.824961][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.832781][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.858072][ T8133] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.871176][ T8128] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.910354][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.920634][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.929176][ T27] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.936529][ T27] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.945830][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.953775][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.961705][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.970598][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.978991][ T27] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.987223][ T27] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.995154][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.004365][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.013844][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.022604][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.032378][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.040470][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.079116][ T8138] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 166.109651][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 166.116779][ C0] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8125 [ 166.124218][ C0] (detected by 0, t=10503 jiffies, g=6093, q=339) [ 166.130703][ C0] syz-executor.0 R running task 24136 8125 8124 0x0000400a [ 166.138593][ C0] Call Trace: [ 166.141878][ C0] [ 166.144724][ C0] sched_show_task+0x40f/0x560 [ 166.149752][ C0] rcu_sched_clock_irq+0x16b1/0x1ad0 [ 166.155035][ C0] update_process_times+0x12d/0x180 [ 166.160220][ C0] tick_sched_timer+0x263/0x420 [ 166.165063][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.170604][ C0] __hrtimer_run_queues+0x403/0x840 [ 166.175898][ C0] hrtimer_interrupt+0x38c/0xda0 [ 166.180917][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.186203][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 166.191759][ C0] apic_timer_interrupt+0xf/0x20 [ 166.196688][ C0] [ 166.199619][ C0] RIP: 0010:free_thread_stack+0x151/0x590 [ 166.205325][ C0] Code: 31 f6 e8 42 af 6e 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 43 a4 69 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 25 a4 69 00 48 8b 3b be fc ff ff ff e8 28 04 00 [ 166.225173][ C0] RSP: 0018:ffffc900022b7918 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.233572][ C0] RAX: 1ffff11012c7dce1 RBX: ffff8880963ee708 RCX: 0000000000000000 [ 166.241711][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002a68840 [ 166.249668][ C0] RBP: ffffc900022b7950 R08: 000000000003a768 R09: ffffed1014f53b2f [ 166.257784][ C0] R10: ffffed1014f53b2f R11: 0000000000000000 R12: ffff8880963ee7a0 [ 166.265755][ C0] R13: dffffc0000000000 R14: 1ffff11012c7dcf4 R15: ffff8880a7a9d968 [ 166.273745][ C0] ? free_thread_stack+0x12e/0x590 [ 166.278881][ C0] put_task_stack+0xa3/0x130 [ 166.283828][ C0] finish_task_switch+0x3f1/0x550 [ 166.288877][ C0] __schedule+0x9a8/0xcc0 [ 166.293217][ C0] ? ___preempt_schedule_notrace+0x16/0x27 [ 166.299025][ C0] preempt_schedule_notrace+0xdb/0x120 [ 166.304479][ C0] ___preempt_schedule_notrace+0x16/0x27 [ 166.310196][ C0] ? rcu_is_watching+0x57/0xa0 [ 166.314944][ C0] rcu_is_watching+0x82/0xa0 [ 166.319520][ C0] memcg_kmem_get_cache+0x301/0x590 [ 166.324735][ C0] ? __should_failslab+0x11a/0x160 [ 166.329848][ C0] ? prepare_creds+0x41/0x5b0 [ 166.334509][ C0] kmem_cache_alloc+0x86/0x2e0 [ 166.339367][ C0] prepare_creds+0x41/0x5b0 [ 166.343877][ C0] copy_creds+0x147/0x6d0 [ 166.348213][ C0] copy_process+0x882/0x5510 [ 166.352825][ C0] _do_fork+0x13e/0x660 [ 166.356970][ C0] ? check_preemption_disabled+0xb4/0x260 [ 166.362671][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.367949][ C0] ? debug_smp_processor_id+0x1c/0x20 [ 166.374090][ C0] __x64_sys_clone+0x20b/0x250 [ 166.378851][ C0] do_syscall_64+0xf7/0x1c0 [ 166.383345][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 166.389219][ C0] RIP: 0033:0x458c4a [ 166.393098][ C0] Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 [ 166.412685][ C0] RSP: 002b:00007ffe1a280f00 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 166.421115][ C0] RAX: ffffffffffffffda RBX: 00007ffe1a280f00 RCX: 0000000000458c4a [ 166.429098][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 166.437627][ C0] RBP: 00007ffe1a280f40 R08: 0000000000000001 R09: 0000000001d3a940 [ 166.445681][ C0] R10: 0000000001d3ac10 R11: 0000000000000246 R12: 0000000000000001 [ 166.453655][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe1a280f90 [ 166.461637][ C0] rcu: rcu_preempt kthread starved for 4969 jiffies! g6093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 166.472629][ C0] rcu: RCU grace-period kthread stack dump: [ 166.478505][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 166.486392][ C0] Call Trace: [ 166.489879][ C0] __schedule+0x9a0/0xcc0 [ 166.494204][ C0] schedule+0x181/0x210 [ 166.498346][ C0] schedule_timeout+0x14f/0x240 [ 166.503184][ C0] ? run_local_timers+0x120/0x120 [ 166.508291][ C0] rcu_gp_kthread+0xed8/0x1770 [ 166.513055][ C0] kthread+0x332/0x350 [ 166.517117][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 166.522213][ C0] ? kthread_blkcg+0xe0/0xe0 [ 166.526789][ C0] ret_from_fork+0x24/0x30