[ 49.214661][ T27] audit: type=1800 audit(1578452205.529:25): pid=8337 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 49.234018][ T27] audit: type=1800 audit(1578452205.529:26): pid=8337 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 49.266463][ T27] audit: type=1800 audit(1578452205.539:27): pid=8337 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. [ 50.133313][ T8447] sshd (8447) used greatest stack depth: 23296 bytes left Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts. 2020/01/08 02:56:53 fuzzer started 2020/01/08 02:56:54 dialing manager at 10.128.0.26:35703 2020/01/08 02:56:54 syscalls: 2824 2020/01/08 02:56:54 code coverage: enabled 2020/01/08 02:56:54 comparison tracing: enabled 2020/01/08 02:56:54 extra coverage: enabled 2020/01/08 02:56:54 setuid sandbox: enabled 2020/01/08 02:56:54 namespace sandbox: enabled 2020/01/08 02:56:54 Android sandbox: /sys/fs/selinux/policy does not exist 2020/01/08 02:56:54 fault injection: enabled 2020/01/08 02:56:54 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/01/08 02:56:54 net packet injection: enabled 2020/01/08 02:56:54 net device setup: enabled 2020/01/08 02:56:54 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2020/01/08 02:56:54 devlink PCI setup: PCI device 0000:00:10.0 is not available 02:56:55 executing program 0: open_by_handle_at(0xffffffffffffff9c, &(0x7f0000000000)={0x8, 0x20000000001, "0f"}, 0xd784c202bc5f473a) 02:56:55 executing program 1: unshare(0x400) r0 = fsopen(&(0x7f0000000000)='sysfs\x00', 0x0) fsconfig$FSCONFIG_SET_STRING(r0, 0x6, 0x0, 0x0, 0x0) fsmount(r0, 0x0, 0x0) syzkaller login: [ 59.212877][ T8503] IPVS: ftp: loaded support on port[0] = 21 [ 59.331995][ T8503] chnl_net:caif_netlink_parms(): no params data found [ 59.381305][ T8503] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.389148][ T8503] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.397206][ T8503] device bridge_slave_0 entered promiscuous mode [ 59.408060][ T8503] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.415558][ T8503] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.424643][ T8503] device bridge_slave_1 entered promiscuous mode 02:56:55 executing program 2: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000180)='/dev/ptmx\x00', 0x0, 0x0) ioctl$TCSETS(r0, 0x40045431, &(0x7f0000000040)) ioctl$TCSETS(r0, 0x5402, &(0x7f0000000200)={0xffff45d9}) r1 = syz_open_pts(r0, 0x0) ioctl$TCSETSF(r1, 0x5412, &(0x7f0000000000)={0xfff}) [ 59.442708][ T8506] IPVS: ftp: loaded support on port[0] = 21 [ 59.453999][ T8503] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.466768][ T8503] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.512674][ T8503] team0: Port device team_slave_0 added [ 59.534869][ T8503] team0: Port device team_slave_1 added [ 59.612970][ T8503] device hsr_slave_0 entered promiscuous mode 02:56:56 executing program 3: mkdir(&(0x7f0000000240)='./file1\x00', 0x0) mkdir(&(0x7f0000000180)='./bus\x00', 0x0) mkdir(&(0x7f0000000400)='./file0\x00', 0x0) mount$overlay(0x400000, &(0x7f0000000000)='./bus\x00', &(0x7f0000000100)='overlay\x00', 0x0, &(0x7f0000000480)={[{@upperdir={'upperdir', 0x3d, './file1'}}, {@lowerdir={'lowerdir', 0x3d, './bus'}}, {@workdir={'workdir', 0x3d, './file0'}}, {@index_on='index=on'}]}) [ 59.669576][ T8503] device hsr_slave_1 entered promiscuous mode [ 59.807501][ T8508] IPVS: ftp: loaded support on port[0] = 21 [ 59.834930][ T8506] chnl_net:caif_netlink_parms(): no params data found 02:56:56 executing program 4: r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000001a00)='/dev/net/tun\x00', 0x0, 0x0) ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f0000000300)={'\x00', 0x1132}) ioctl$TUNSETOFFLOAD(r0, 0x400454de, 0xbc58626f8c3fc35d) [ 59.962137][ T8503] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 60.012169][ T8503] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.069886][ T8503] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.089251][ T8511] IPVS: ftp: loaded support on port[0] = 21 [ 60.130407][ T8503] netdevsim netdevsim0 netdevsim3: renamed from eth3 02:56:56 executing program 5: r0 = socket$inet6(0xa, 0x2, 0x0) connect$inet6(r0, &(0x7f0000000100), 0x1c) sendmmsg$sock(r0, &(0x7f0000002f00)=[{{0x0, 0x0, 0x0}}, {{0x0, 0x0, 0x0, 0x0, &(0x7f0000000040)=[@timestamping={{0x10}}], 0x10}}], 0x2, 0x0) [ 60.220995][ T8506] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.228170][ T8506] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.242121][ T8513] IPVS: ftp: loaded support on port[0] = 21 [ 60.253703][ T8506] device bridge_slave_0 entered promiscuous mode [ 60.295773][ T8503] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.303026][ T8503] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.310894][ T8503] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.317985][ T8503] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.329141][ T8506] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.336397][ T8506] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.346799][ T8506] device bridge_slave_1 entered promiscuous mode [ 60.388322][ T2689] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.396437][ T2689] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.463257][ T8506] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.475291][ T8506] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.515573][ T8508] chnl_net:caif_netlink_parms(): no params data found [ 60.523405][ T8515] IPVS: ftp: loaded support on port[0] = 21 [ 60.546883][ T8511] chnl_net:caif_netlink_parms(): no params data found [ 60.585277][ T8506] team0: Port device team_slave_0 added [ 60.608478][ T8511] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.615603][ T8511] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.623454][ T8511] device bridge_slave_0 entered promiscuous mode [ 60.632801][ T8511] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.639963][ T8511] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.647634][ T8511] device bridge_slave_1 entered promiscuous mode [ 60.666970][ T8506] team0: Port device team_slave_1 added [ 60.685349][ T8503] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.697145][ T8511] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.732659][ T8511] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.754015][ T8508] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.761846][ T8508] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.771572][ T8508] device bridge_slave_0 entered promiscuous mode [ 60.795226][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.803555][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.880097][ T8506] device hsr_slave_0 entered promiscuous mode [ 60.918755][ T8506] device hsr_slave_1 entered promiscuous mode [ 60.968548][ T8506] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 60.976751][ T8506] Cannot create hsr debugfs directory [ 60.983789][ T8503] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.993552][ T8508] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.000901][ T8508] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.009027][ T8508] device bridge_slave_1 entered promiscuous mode [ 61.056941][ T8511] team0: Port device team_slave_0 added [ 61.066415][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.076078][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.084735][ T3042] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.091852][ T3042] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.099849][ T8513] chnl_net:caif_netlink_parms(): no params data found [ 61.114807][ T8508] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.125262][ T8511] team0: Port device team_slave_1 added [ 61.137427][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.147114][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.155992][ T3042] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.163117][ T3042] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.181573][ T8508] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.219792][ T8508] team0: Port device team_slave_0 added [ 61.234277][ T3052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.264577][ T8508] team0: Port device team_slave_1 added [ 61.322748][ T8511] device hsr_slave_0 entered promiscuous mode [ 61.379402][ T8511] device hsr_slave_1 entered promiscuous mode [ 61.428462][ T8511] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 61.436055][ T8511] Cannot create hsr debugfs directory [ 61.455048][ T8513] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.463107][ T8513] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.470837][ T8513] device bridge_slave_0 entered promiscuous mode [ 61.478846][ T8513] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.485898][ T8513] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.493808][ T8513] device bridge_slave_1 entered promiscuous mode [ 61.501969][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.557344][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.568077][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.577380][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.640693][ T8508] device hsr_slave_0 entered promiscuous mode [ 61.688801][ T8508] device hsr_slave_1 entered promiscuous mode [ 61.738403][ T8508] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 61.745966][ T8508] Cannot create hsr debugfs directory [ 61.780011][ T8515] chnl_net:caif_netlink_parms(): no params data found [ 61.791199][ T8513] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.815715][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.824358][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.839120][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.848381][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.861686][ T8513] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.877874][ T8506] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 61.966390][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.975861][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.985640][ T8506] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 62.032592][ T8506] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 62.092240][ T8506] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 62.153106][ T8513] team0: Port device team_slave_0 added [ 62.164811][ T8503] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.187119][ T8515] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.194939][ T8515] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.203158][ T8515] device bridge_slave_0 entered promiscuous mode [ 62.212932][ T8513] team0: Port device team_slave_1 added [ 62.250195][ T8515] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.257278][ T8515] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.265251][ T8515] device bridge_slave_1 entered promiscuous mode [ 62.288629][ T8511] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 62.350643][ T8511] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 62.431309][ T8513] device hsr_slave_0 entered promiscuous mode [ 62.478792][ T8513] device hsr_slave_1 entered promiscuous mode [ 62.548407][ T8513] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 62.556106][ T8513] Cannot create hsr debugfs directory [ 62.567514][ T8511] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 62.620644][ T8508] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 62.671591][ T8515] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.690977][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.702205][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.710426][ T8511] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 62.764590][ T8508] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 62.821187][ T8508] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 62.864589][ T8503] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.872968][ T8515] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.900013][ T8508] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 62.968235][ T8515] team0: Port device team_slave_0 added [ 62.982712][ T8515] team0: Port device team_slave_1 added [ 63.037216][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 63.047311][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 63.062983][ T8503] device veth0_vlan entered promiscuous mode [ 63.120305][ T8515] device hsr_slave_0 entered promiscuous mode [ 63.148811][ T8515] device hsr_slave_1 entered promiscuous mode [ 63.188604][ T8515] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 63.196184][ T8515] Cannot create hsr debugfs directory [ 63.202411][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 63.211137][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 63.220181][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 63.227840][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 63.290677][ T8506] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.332991][ T8513] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 63.366168][ T8503] device veth1_vlan entered promiscuous mode [ 63.379198][ T8506] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.389740][ T8513] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 63.431035][ T8513] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 63.472343][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 63.480947][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 63.489376][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.503876][ T8513] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 63.564064][ T8508] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.573758][ T2689] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 63.582894][ T2689] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 63.593955][ T2689] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.602627][ T2689] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.609721][ T2689] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.629772][ T8511] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.648443][ T8511] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.659013][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 63.666942][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 63.676420][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 63.685173][ T2750] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.692378][ T2750] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.701979][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 63.710562][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 63.719637][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 63.727249][ T2750] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.753646][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 63.762717][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 63.777555][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 63.786214][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 63.794989][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 63.804082][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 63.812385][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 63.821754][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 63.849468][ T8506] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 63.865417][ T8508] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.874538][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 63.891126][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 63.904613][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.912796][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 63.924039][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.932719][ T3042] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.939824][ T3042] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.947939][ T3042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 168.928310][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 168.935460][ C0] rcu: 0-...!: (10500 ticks this GP) idle=882/1/0x4000000000000002 softirq=13652/13652 fqs=5 [ 168.945982][ C0] (t=10502 jiffies g=6545 q=53) [ 168.950919][ C0] rcu: rcu_preempt kthread starved for 10493 jiffies! g6545 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 168.962007][ C0] rcu: RCU grace-period kthread stack dump: [ 168.968182][ C0] rcu_preempt R running task 28984 10 2 0x80004000 [ 168.976094][ C0] Call Trace: [ 168.979383][ C0] __schedule+0x9a0/0xcc0 [ 168.983727][ C0] schedule+0x181/0x210 [ 168.987887][ C0] schedule_timeout+0x14f/0x240 [ 168.992745][ C0] ? run_local_timers+0x120/0x120 [ 168.997772][ C0] rcu_gp_kthread+0xed8/0x1770 [ 169.002540][ C0] kthread+0x332/0x350 [ 169.006600][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 169.011731][ C0] ? kthread_blkcg+0xe0/0xe0 [ 169.016313][ C0] ret_from_fork+0x24/0x30 [ 169.020753][ C0] NMI backtrace for cpu 0 [ 169.025075][ C0] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.5.0-rc5-syzkaller #0 [ 169.033293][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 169.043447][ C0] Workqueue: 0x0 (gid-cache-wq) [ 169.048373][ C0] Call Trace: [ 169.051647][ C0] [ 169.054492][ C0] dump_stack+0x1fb/0x318 [ 169.058820][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 169.063665][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 169.069815][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 169.075874][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 169.081852][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 169.087752][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 169.093050][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 169.098246][ C0] ? trace_hardirqs_off+0x74/0x80 [ 169.103264][ C0] update_process_times+0x12d/0x180 [ 169.108514][ C0] tick_sched_timer+0x263/0x420 [ 169.113532][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 169.119070][ C0] __hrtimer_run_queues+0x403/0x840 [ 169.124287][ C0] hrtimer_interrupt+0x38c/0xda0 [ 169.129245][ C0] ? debug_smp_processor_id+0x9/0x20 [ 169.134524][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 169.140060][ C0] apic_timer_interrupt+0xf/0x20 [ 169.145001][ C0] [ 169.147970][ C0] RIP: 0010:free_thread_stack+0x186/0x590 [ 169.153701][ C0] Code: 8b 3b be fc ff ff ff e8 28 04 00 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 39 94 6a 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 1b 94 6a 00 48 8b 1b e9 82 ff ff [ 169.173311][ C0] RSP: 0018:ffffc90000dd7c30 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 [ 169.181718][ C0] RAX: 1ffff11014e84f61 RBX: ffff8880a7427b08 RCX: ffff8880a9bec580 [ 169.189693][ C0] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00023d5200 [ 169.197659][ C0] RBP: ffffc90000dd7c68 R08: 000000000003a728 R09: ffffed1012f0baf9 [ 169.205619][ C0] R10: ffffed1012f0baf9 R11: 0000000000000000 R12: ffff8880a7427ba0 [ 169.213581][ C0] R13: dffffc0000000000 R14: 1ffff11014e84f74 R15: ffff88809785d7b8 [ 169.221577][ C0] put_task_stack+0xa3/0x130 [ 169.226161][ C0] finish_task_switch+0x3f1/0x550 [ 169.231181][ C0] __schedule+0x9a8/0xcc0 [ 169.235510][ C0] schedule+0x181/0x210 [ 169.239657][ C0] worker_thread+0x10d6/0x1630 [ 169.244461][ C0] kthread+0x332/0x350 [ 169.248516][ C0] ? rcu_lock_release+0x30/0x30 [ 169.253353][ C0] ? kthread_blkcg+0xe0/0xe0 [ 169.257937][ C0] ret_from_fork+0x24/0x30