[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 46.430493][ T25] audit: type=1800 audit(1575406078.179:25): pid=8256 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 46.465868][ T25] audit: type=1800 audit(1575406078.179:26): pid=8256 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 46.504252][ T25] audit: type=1800 audit(1575406078.189:27): pid=8256 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 '10.128.0.62' (ECDSA) to the list of known hosts. 2019/12/03 20:48:06 fuzzer started 2019/12/03 20:48:08 dialing manager at 10.128.0.26:42111 2019/12/03 20:48:08 syscalls: 2689 2019/12/03 20:48:08 code coverage: enabled 2019/12/03 20:48:08 comparison tracing: enabled 2019/12/03 20:48:08 extra coverage: extra coverage is not supported by the kernel 2019/12/03 20:48:08 setuid sandbox: enabled 2019/12/03 20:48:08 namespace sandbox: enabled 2019/12/03 20:48:08 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 20:48:08 fault injection: enabled 2019/12/03 20:48:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 20:48:08 net packet injection: enabled 2019/12/03 20:48:08 net device setup: enabled 2019/12/03 20:48:08 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 20:48:08 devlink PCI setup: PCI device 0000:00:10.0 is not available 20:48:09 executing program 0: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x2) r0 = socket$inet(0x2, 0x4000000000000001, 0x0) bind$inet(r0, &(0x7f0000000280)={0x2, 0x4e23, @multicast1}, 0x10) sendto$inet(r0, 0x0, 0x0, 0x200007fe, &(0x7f0000e68000)={0x2, 0x4e23, @dev={0xac, 0x14, 0x14, 0x1e}}, 0x10) setsockopt$SO_BINDTODEVICE(0xffffffffffffffff, 0x1, 0x19, &(0x7f0000000180)='veth1_to_bridge\x00', 0x10) r1 = dup2(r0, r0) write$UHID_GET_REPORT_REPLY(r1, &(0x7f0000000080), 0xa) getsockname$inet(0xffffffffffffffff, 0x0, &(0x7f00000001c0)) bind$bt_rfcomm(0xffffffffffffffff, &(0x7f0000000000)={0x1f, {0x0, 0x1ff}}, 0xa) bpf$MAP_CREATE(0x0, 0x0, 0x0) socketpair$unix(0x1, 0x0, 0x0, &(0x7f0000000080)) dup(0xffffffffffffffff) ioctl$PERF_EVENT_IOC_ENABLE(0xffffffffffffffff, 0x8912, 0x0) write$P9_RRENAME(0xffffffffffffffff, 0x0, 0x0) bpf$MAP_UPDATE_ELEM(0x2, 0x0, 0x0) bpf$MAP_LOOKUP_ELEM(0x4, 0x0, 0x0) setsockopt$inet6_group_source_req(0xffffffffffffffff, 0x29, 0x2b, 0x0, 0x0) getsockopt$inet6_int(0xffffffffffffffff, 0x29, 0x0, 0x0, &(0x7f0000000300)) fcntl$dupfd(0xffffffffffffffff, 0x0, 0xffffffffffffffff) openat$vcs(0xffffffffffffff9c, 0x0, 0x0, 0x0) write$cgroup_subtree(0xffffffffffffffff, &(0x7f0000000100), 0x0) sendto$inet(r0, &(0x7f0000000000), 0xfffffffffffffce9, 0x0, 0x0, 0x0) r2 = bpf$MAP_CREATE(0x0, 0x0, 0x0) bpf$MAP_UPDATE_ELEM(0x2, 0x0, 0x0) fsetxattr$trusted_overlay_redirect(r2, 0x0, &(0x7f0000000440)='./file0\x00', 0x8, 0x0) syz_read_part_table(0x0, 0x0, 0x0) syz_open_dev$char_usb(0xc, 0xb4, 0x0) socketpair(0x0, 0x1, 0x0, 0x0) ioctl$TIOCSERGETLSR(0xffffffffffffffff, 0x5459, &(0x7f0000000240)) 20:48:09 executing program 1: r0 = io_uring_setup(0xf9, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x0, 0x0, [], {0x0, 0x0, 0x0, 0x0, 0x0, 0x2}}) close(r0) syzkaller login: [ 57.994224][ T8419] IPVS: ftp: loaded support on port[0] = 21 [ 58.139875][ T8419] chnl_net:caif_netlink_parms(): no params data found [ 58.184466][ T8419] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.194788][ T8419] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.203422][ T8419] device bridge_slave_0 entered promiscuous mode [ 58.213593][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.221330][ T8419] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.230611][ T8419] device bridge_slave_1 entered promiscuous mode [ 58.252409][ T8419] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link 20:48:10 executing program 2: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) r1 = eventfd2(0x0, 0x0) r2 = fcntl$dupfd(r0, 0x0, r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = socket$inet(0x10, 0x2, 0x0) sendmsg(r3, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000100)=[{&(0x7f0000000140)="24000000210007041dfffd946f610500020000e8fe02080100010800080017000400ff7e280000001100ffffba16a0aa1c0900000000000012000000000000eff24d8238cfa47e23f7efbf54", 0x4c}], 0x1}, 0x0) [ 58.278733][ T8419] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.296202][ T8423] IPVS: ftp: loaded support on port[0] = 21 [ 58.325681][ T8419] team0: Port device team_slave_0 added [ 58.350495][ T8419] team0: Port device team_slave_1 added [ 58.439474][ T8419] device hsr_slave_0 entered promiscuous mode [ 58.477345][ T8419] device hsr_slave_1 entered promiscuous mode 20:48:10 executing program 3: r0 = memfd_create(&(0x7f0000000140)='$.6/%cpuset]\x00', 0x0) write$binfmt_elf64(r0, &(0x7f0000000680)=ANY=[@ANYBLOB="7f454c46020000000000000000c4b40003003e"], 0x13) clone(0x100, 0x0, 0xfffffffffffffffe, 0x0, 0xffffffffffffffff) execveat(r0, &(0x7f0000000000)='\x00', 0x0, 0x0, 0x1000) [ 58.565244][ T8425] IPVS: ftp: loaded support on port[0] = 21 [ 58.697972][ T8428] IPVS: ftp: loaded support on port[0] = 21 [ 58.736818][ T8419] netdevsim netdevsim0 netdevsim0: renamed from eth0 20:48:10 executing program 4: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$nl_netfilter(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000c80)=ANY=[@ANYBLOB="140000000301ffff808fc201000000000000101b"], 0x14}}, 0x0) [ 58.877986][ T8419] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.931756][ T8423] chnl_net:caif_netlink_parms(): no params data found [ 58.977957][ T8419] netdevsim netdevsim0 netdevsim2: renamed from eth2 20:48:10 executing program 5: r0 = bpf$BPF_BTF_LOAD(0x12, &(0x7f00000003c0)={&(0x7f0000000000)=ANY=[@ANYBLOB="9feb010018000000000000000c0000000c000000020000000000000000000004020000000000"], 0x0, 0x26}, 0x20) bpf$PROG_LOAD(0x5, &(0x7f0000000280)={0x4, 0x3, &(0x7f0000000080)=@framed, &(0x7f00000000c0)='GPL\x00', 0x4, 0xba, &(0x7f00000001c0)=""/186, 0x0, 0x0, [], 0x0, 0x0, r0, 0x2, 0x0, 0x1, 0x10, &(0x7f0000000140), 0xfd06}, 0x70) [ 59.038214][ T8419] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.113717][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.121084][ T8419] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.128951][ T8419] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.136018][ T8419] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.157163][ T8425] chnl_net:caif_netlink_parms(): no params data found [ 59.171589][ T8433] IPVS: ftp: loaded support on port[0] = 21 [ 59.185675][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.195084][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.211120][ T8431] IPVS: ftp: loaded support on port[0] = 21 [ 59.257192][ T8423] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.264303][ T8423] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.272653][ T8423] device bridge_slave_0 entered promiscuous mode [ 59.284285][ T8423] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.291586][ T8423] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.299245][ T8423] device bridge_slave_1 entered promiscuous mode [ 59.332368][ T8425] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.339893][ T8425] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.348217][ T8425] device bridge_slave_0 entered promiscuous mode [ 59.369749][ T8423] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.384474][ T8428] chnl_net:caif_netlink_parms(): no params data found [ 59.395307][ T8425] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.402915][ T8425] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.410834][ T8425] device bridge_slave_1 entered promiscuous mode [ 59.435301][ T8423] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.461882][ T8425] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.491307][ T8425] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.503212][ T8423] team0: Port device team_slave_0 added [ 59.512387][ T8423] team0: Port device team_slave_1 added [ 59.546510][ T8428] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.554094][ T8428] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.562289][ T8428] device bridge_slave_0 entered promiscuous mode [ 59.571819][ T8428] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.579160][ T8428] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.586844][ T8428] device bridge_slave_1 entered promiscuous mode [ 59.612284][ T8425] team0: Port device team_slave_0 added [ 59.620710][ T8425] team0: Port device team_slave_1 added [ 59.629346][ T8419] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.699595][ T8423] device hsr_slave_0 entered promiscuous mode [ 59.737155][ T8423] device hsr_slave_1 entered promiscuous mode [ 59.796834][ T8423] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.869548][ T8425] device hsr_slave_0 entered promiscuous mode [ 59.907489][ T8425] device hsr_slave_1 entered promiscuous mode [ 59.946817][ T8425] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.958317][ T8428] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.971633][ T8428] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.014609][ T8428] team0: Port device team_slave_0 added [ 60.031034][ T8422] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.039606][ T8422] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.051393][ T8419] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.086904][ T8428] team0: Port device team_slave_1 added [ 60.116892][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.125893][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.134336][ T3207] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.141843][ T3207] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.209996][ T8428] device hsr_slave_0 entered promiscuous mode [ 60.267954][ T8428] device hsr_slave_1 entered promiscuous mode [ 60.327293][ T8428] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.336871][ T8433] chnl_net:caif_netlink_parms(): no params data found [ 60.353207][ T8425] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.410237][ T8425] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 60.459313][ T8425] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 60.499661][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.509049][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.517792][ T8439] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.524839][ T8439] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.552312][ T8423] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 60.609193][ T8423] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 60.658925][ T8431] chnl_net:caif_netlink_parms(): no params data found [ 60.672206][ T8425] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 60.729515][ T8422] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.756927][ T8423] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 60.802536][ T8423] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 60.849686][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.858572][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.867471][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.876089][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.884974][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.893638][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.901606][ T8433] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.909408][ T8433] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.918140][ T8433] device bridge_slave_0 entered promiscuous mode [ 60.929027][ T8433] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.936372][ T8433] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.944208][ T8433] device bridge_slave_1 entered promiscuous mode [ 60.993187][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.002169][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.019877][ T8433] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.032982][ T8419] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 61.045034][ T8419] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.067272][ T8428] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 61.089857][ T8431] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.098981][ T8431] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.107358][ T8431] device bridge_slave_0 entered promiscuous mode [ 61.116598][ T8433] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.127717][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.136443][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.162756][ T8419] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.174763][ T8428] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 61.229197][ T8428] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 61.259180][ T8431] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.266291][ T8431] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.274361][ T8431] device bridge_slave_1 entered promiscuous mode [ 61.297675][ T8422] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 61.305207][ T8422] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 61.327111][ T8428] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 61.420125][ T8431] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.455375][ T8431] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.467478][ T8433] team0: Port device team_slave_0 added [ 166.466626][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 166.473631][ C0] (detected by 0, t=10502 jiffies, g=6753, q=233) [ 166.480127][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953783-4294943280), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 166.493506][ C0] syz-executor.0 R running task 29104 8448 8419 0x0000400e [ 166.501423][ C0] Call Trace: [ 166.504705][ C0] [ 166.507566][ C0] sched_show_task+0x40f/0x560 [ 166.512342][ C0] rcu_sched_clock_irq+0x1861/0x1ad0 [ 166.517631][ C0] update_process_times+0x12d/0x180 [ 166.522825][ C0] tick_sched_timer+0x263/0x420 [ 166.527682][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.533221][ C0] __hrtimer_run_queues+0x403/0x840 [ 166.538431][ C0] hrtimer_interrupt+0x38c/0xda0 [ 166.543377][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.548659][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 166.554468][ C0] apic_timer_interrupt+0xf/0x20 [ 166.559441][ C0] [ 166.562400][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x50 [ 166.568556][ C0] Code: 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 13 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 [ 166.588158][ C0] RSP: 0018:ffffc900026e7a08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.596568][ C0] RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff88806be7a100 [ 166.604568][ C0] RDX: ffffc9000306a000 RSI: 000000000003ffff RDI: 0000000000040000 [ 166.612640][ C0] RBP: ffffc900026e7a30 R08: dffffc0000000000 R09: fffffbfff12877ed [ 166.620607][ C0] R10: fffffbfff12877ed R11: 0000000000000000 R12: dffffc0000000000 [ 166.628570][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880a0295468 [ 166.636556][ C0] ? mod_memcg_page_state+0x123/0x190 [ 166.642018][ C0] ? free_thread_stack+0x124/0x590 [ 166.647118][ C0] ? mod_memcg_page_state+0x123/0x190 [ 166.652480][ C0] free_thread_stack+0x168/0x590 [ 166.657413][ C0] put_task_stack+0xa3/0x130 [ 166.661997][ C0] finish_task_switch+0x3f1/0x550 [ 166.667013][ C0] __schedule+0x9a8/0xcc0 [ 166.671338][ C0] schedule+0x181/0x210 [ 166.675486][ C0] schedule_preempt_disabled+0x13/0x20 [ 166.680938][ C0] __mutex_lock_common+0x1411/0x2e10 [ 166.686217][ C0] ? __se_sys_perf_event_open+0xb66/0x41c0 [ 166.692036][ C0] mutex_lock_interruptible_nested+0x1b/0x30 [ 166.698007][ C0] __se_sys_perf_event_open+0xb66/0x41c0 [ 166.703751][ C0] ? __might_fault+0x81/0x160 [ 166.709056][ C0] ? check_preemption_disabled+0xb4/0x260 [ 166.715380][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.720673][ C0] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 166.726384][ C0] __x64_sys_perf_event_open+0xbf/0xd0 [ 166.731839][ C0] do_syscall_64+0xf7/0x1c0 [ 166.736335][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 166.742212][ C0] RIP: 0033:0x45a679 [ 166.746100][ C0] 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 [ 166.765733][ C0] RSP: 002b:00007fbc84228c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 166.774170][ C0] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a679 [ 166.782236][ C0] RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 [ 166.790983][ C0] RBP: 000000000075c118 R08: 0000000000000002 R09: 0000000000000000 [ 166.798952][ C0] R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fbc842296d4 [ 166.806914][ C0] R13: 00000000004c84be R14: 00000000004df8d8 R15: 00000000ffffffff [ 166.814898][ C0] rcu: rcu_preempt kthread starved for 10536 jiffies! g6753 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 166.825998][ C0] rcu: RCU grace-period kthread stack dump: [ 166.832051][ C0] rcu_preempt R running task 29104 10 2 0x80004008 [ 166.839944][ C0] Call Trace: [ 166.843233][ C0] __schedule+0x9a8/0xcc0 [ 166.847561][ C0] schedule+0x181/0x210 [ 166.851707][ C0] schedule_timeout+0x14f/0x240 [ 166.856552][ C0] ? run_local_timers+0x120/0x120 [ 166.861572][ C0] rcu_gp_kthread+0xed8/0x1770 [ 166.866338][ C0] kthread+0x332/0x350 [ 166.870399][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 166.875497][ C0] ? kthread_blkcg+0xe0/0xe0 [ 166.880075][ C0] ret_from_fork+0x24/0x30