[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.424853][ T23] audit: type=1800 audit(1581576385.705:25): pid=8652 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.458039][ T23] audit: type=1800 audit(1581576385.705:26): pid=8652 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.479868][ T23] audit: type=1800 audit(1581576385.705:27): pid=8652 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 '10.128.0.151' (ECDSA) to the list of known hosts. 2020/02/13 06:50:32 parsed 1 programs 2020/02/13 06:50:34 executed programs: 0 syzkaller login: [ 306.682760][ T8819] IPVS: ftp: loaded support on port[0] = 21 [ 306.731659][ T8819] chnl_net:caif_netlink_parms(): no params data found [ 306.764171][ T8819] bridge0: port 1(bridge_slave_0) entered blocking state [ 306.772184][ T8819] bridge0: port 1(bridge_slave_0) entered disabled state [ 306.780256][ T8819] device bridge_slave_0 entered promiscuous mode [ 306.788307][ T8819] bridge0: port 2(bridge_slave_1) entered blocking state [ 306.796064][ T8819] bridge0: port 2(bridge_slave_1) entered disabled state [ 306.803918][ T8819] device bridge_slave_1 entered promiscuous mode [ 306.819012][ T8819] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 306.830023][ T8819] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 306.847168][ T8819] team0: Port device team_slave_0 added [ 306.854874][ T8819] team0: Port device team_slave_1 added [ 306.867643][ T8819] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 306.875068][ T8819] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 306.901205][ T8819] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 306.913698][ T8819] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 306.920786][ T8819] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 306.946700][ T8819] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 307.051788][ T8819] device hsr_slave_0 entered promiscuous mode [ 307.120574][ T8819] device hsr_slave_1 entered promiscuous mode [ 307.212948][ T8819] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 307.262583][ T8819] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 307.322502][ T8819] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 307.362638][ T8819] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 307.430455][ T8819] bridge0: port 2(bridge_slave_1) entered blocking state [ 307.437634][ T8819] bridge0: port 2(bridge_slave_1) entered forwarding state [ 307.445433][ T8819] bridge0: port 1(bridge_slave_0) entered blocking state [ 307.452521][ T8819] bridge0: port 1(bridge_slave_0) entered forwarding state [ 307.488830][ T8819] 8021q: adding VLAN 0 to HW filter on device bond0 [ 307.503484][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 307.513914][ T2922] bridge0: port 1(bridge_slave_0) entered disabled state [ 307.522274][ T2922] bridge0: port 2(bridge_slave_1) entered disabled state [ 307.530484][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 307.542512][ T8819] 8021q: adding VLAN 0 to HW filter on device team0 [ 307.553539][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 307.562243][ T2836] bridge0: port 1(bridge_slave_0) entered blocking state [ 307.569288][ T2836] bridge0: port 1(bridge_slave_0) entered forwarding state [ 307.592410][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 307.601271][ T2922] bridge0: port 2(bridge_slave_1) entered blocking state [ 307.608322][ T2922] bridge0: port 2(bridge_slave_1) entered forwarding state [ 307.616380][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 307.624974][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 307.633615][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 307.643401][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 307.654876][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 307.665939][ T8819] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 307.683872][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 307.691903][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 307.704711][ T8819] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 307.721641][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 307.740058][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 307.748539][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 307.759152][ T8819] device veth0_vlan entered promiscuous mode [ 307.766861][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 307.776690][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 307.789145][ T8819] device veth1_vlan entered promiscuous mode [ 307.806975][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 307.815655][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 307.824333][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 307.833235][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 307.844157][ T8819] device veth0_macvtap entered promiscuous mode [ 307.854067][ T8819] device veth1_macvtap entered promiscuous mode [ 307.868337][ T8819] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 307.876300][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 307.885993][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 307.894697][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 307.903779][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 307.915983][ T8819] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 307.924870][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 307.933726][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 314.159307][ T8826] Cannot find add_set index 0 as target [ 398.871165][ T0] NOHZ: local_softirq_pending 08 [ 419.351897][ T0] NOHZ: local_softirq_pending 08 [ 542.231251][ T0] NOHZ: local_softirq_pending 08 [ 562.712989][ T0] NOHZ: local_softirq_pending 08 [ 583.191119][ T0] NOHZ: local_softirq_pending 08 [ 603.682099][ T0] NOHZ: local_softirq_pending 08 2020/02/13 06:55:32 executed programs: 1 2020/02/13 06:55:32 result: hanged=false err=executor 0: failed to write control pipe: write |1: broken pipe [ 604.715999][ T8830] IPVS: ftp: loaded support on port[0] = 21 [ 604.833356][ T8830] chnl_net:caif_netlink_parms(): no params data found [ 604.864682][ T8830] bridge0: port 1(bridge_slave_0) entered blocking state [ 604.871840][ T8830] bridge0: port 1(bridge_slave_0) entered disabled state [ 604.879434][ T8830] device bridge_slave_0 entered promiscuous mode [ 604.887610][ T8830] bridge0: port 2(bridge_slave_1) entered blocking state [ 604.894856][ T8830] bridge0: port 2(bridge_slave_1) entered disabled state [ 604.902492][ T8830] device bridge_slave_1 entered promiscuous mode [ 604.917923][ T8830] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 604.928641][ T8830] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 604.946580][ T8830] team0: Port device team_slave_0 added [ 604.954349][ T8830] team0: Port device team_slave_1 added [ 604.967692][ T8830] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 604.974885][ T8830] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 605.001174][ T8830] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 605.013954][ T8830] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 605.021073][ T8830] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 605.047085][ T8830] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 605.181633][ T8830] device hsr_slave_0 entered promiscuous mode [ 605.220251][ T8830] device hsr_slave_1 entered promiscuous mode [ 605.270502][ T8830] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 605.278982][ T8830] Cannot create hsr debugfs directory [ 605.328505][ T8830] bridge0: port 2(bridge_slave_1) entered blocking state [ 605.335723][ T8830] bridge0: port 2(bridge_slave_1) entered forwarding state [ 605.343172][ T8830] bridge0: port 1(bridge_slave_0) entered blocking state [ 605.350411][ T8830] bridge0: port 1(bridge_slave_0) entered forwarding state [ 605.388432][ T8830] 8021q: adding VLAN 0 to HW filter on device bond0 [ 605.406287][ T8830] 8021q: adding VLAN 0 to HW filter on device team0 [ 605.414683][ T2923] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 605.423599][ T2923] bridge0: port 1(bridge_slave_0) entered disabled state [ 605.443073][ T2923] bridge0: port 2(bridge_slave_1) entered disabled state [ 605.519258][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 605.528126][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 605.537824][ T2834] bridge0: port 1(bridge_slave_0) entered blocking state [ 605.547488][ T2834] bridge0: port 1(bridge_slave_0) entered forwarding state [ 605.560059][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 605.568859][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 605.577793][ T2899] bridge0: port 2(bridge_slave_1) entered blocking state [ 605.585016][ T2899] bridge0: port 2(bridge_slave_1) entered forwarding state [ 605.595590][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 605.607575][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 605.619331][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 605.629440][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 605.639272][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 605.649655][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 605.659375][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 605.674617][ T8830] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 605.685275][ T8830] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 605.696742][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 605.705556][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 605.714011][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 605.722777][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 605.731218][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 605.751758][ T8830] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 605.759172][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 605.767151][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 605.818880][ T8830] device veth0_vlan entered promiscuous mode [ 605.826898][ T8837] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 605.836786][ T8837] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 605.845763][ T8837] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 605.855090][ T8837] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 605.863686][ T8837] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 605.871672][ T8837] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 605.884778][ T8830] device veth1_vlan entered promiscuous mode [ 605.945072][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 605.954599][ T7] tipc: TX() has been purged, node left! [ 605.970614][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 605.992433][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 606.025719][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 606.564055][ T8830] device veth0_macvtap entered promiscuous mode [ 606.587727][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 606.605108][ T8830] device veth1_macvtap entered promiscuous mode [ 606.669779][ T8830] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 [ 606.690072][ T8830] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 606.723306][ T8830] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 606.732101][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 606.750735][ T2834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 606.775385][ T8830] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 [ 606.793905][ T8830] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 606.808457][ T8830] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 606.828375][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 606.838677][ T2836] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 609.374897][ T7] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 609.384847][ T7] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 609.394892][ T7] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 609.404877][ T7] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 609.416115][ T7] device bridge_slave_1 left promiscuous mode [ 609.425713][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 609.485315][ T7] device bridge_slave_0 left promiscuous mode [ 609.494865][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 609.554731][ T7] device veth1_macvtap left promiscuous mode [ 609.561351][ T7] device veth0_macvtap left promiscuous mode [ 609.568138][ T7] device veth1_vlan left promiscuous mode [ 609.577065][ T7] device veth0_vlan left promiscuous mode [ 613.152641][ T8879] Cannot find add_set index 0 as target [ 614.160997][ T7] device hsr_slave_0 left promiscuous mode [ 614.200106][ T7] device hsr_slave_1 left promiscuous mode [ 614.263163][ T7] team0 (unregistering): Port device team_slave_1 removed [ 614.278229][ T7] team0 (unregistering): Port device team_slave_0 removed [ 614.293349][ T7] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 614.358389][ T7] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 614.507201][ T7] bond0 (unregistering): Released all slaves [ 615.193063][ T0] NOHZ: local_softirq_pending 08 [ 635.672831][ T0] NOHZ: local_softirq_pending 08 [ 656.151225][ T0] NOHZ: local_softirq_pending 08 [ 738.071219][ T0] NOHZ: local_softirq_pending 08 [ 790.550002][ T1105] INFO: task kworker/u4:0:7 blocked for more than 143 seconds. [ 790.557702][ T1105] Not tainted 5.6.0-rc1-syzkaller #0 [ 790.565289][ T1105] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 790.574373][ T1105] kworker/u4:0 D24608 7 2 0x80004000 [ 790.586561][ T1105] Workqueue: netns cleanup_net [ 790.591660][ T1105] Call Trace: [ 790.595044][ T1105] __schedule+0x87f/0xcd0 [ 790.599391][ T1105] schedule+0x188/0x210 [ 790.604847][ T1105] schedule_preempt_disabled+0x13/0x20 [ 790.610798][ T1105] __mutex_lock_common+0x11f1/0x2f30 [ 790.616222][ T1105] ? hashlimit_net_exit+0x40/0x210 [ 790.623160][ T1105] mutex_lock_nested+0x1b/0x30 [ 790.627925][ T1105] hashlimit_net_exit+0x40/0x210 [ 790.633221][ T1105] cleanup_net+0x6f8/0xb80 [ 790.637755][ T1105] process_one_work+0x7f5/0x10f0 [ 790.643998][ T1105] worker_thread+0xbbc/0x1630 [ 790.648774][ T1105] kthread+0x332/0x350 [ 790.653296][ T1105] ? rcu_lock_release+0x30/0x30 [ 790.658152][ T1105] ? kthread_blkcg+0xe0/0xe0 [ 790.664135][ T1105] ret_from_fork+0x24/0x30 [ 790.668648][ T1105] [ 790.668648][ T1105] Showing all locks held in the system: [ 790.676765][ T1105] 4 locks held by kworker/u4:0/7: [ 790.682969][ T1105] #0: ffff8880a9a7e128 ((wq_completion)netns){+.+.}, at: process_one_work+0x763/0x10f0 [ 790.693004][ T1105] #1: ffffc90000cdfd78 (net_cleanup_work){+.+.}, at: process_one_work+0x7a5/0x10f0 [ 790.703599][ T1105] #2: ffffffff8958f1e8 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa5/0xb80 [ 790.713434][ T1105] #3: ffffffff895adf30 (hashlimit_mutex){+.+.}, at: hashlimit_net_exit+0x40/0x210 [ 790.724038][ T1105] 1 lock held by khungtaskd/1105: [ 790.729053][ T1105] #0: ffffffff892d98c8 (rcu_read_lock){....}, at: rcu_lock_acquire+0x4/0x30 [ 790.738214][ T1105] 1 lock held by rsyslogd/8690: [ 790.744261][ T1105] #0: ffff88809b7546a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x279/0x310 [ 790.753379][ T1105] 2 locks held by getty/8780: [ 790.758043][ T1105] #0: ffff8880a4ba2090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.768662][ T1105] #1: ffffc9000187b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.778723][ T1105] 2 locks held by getty/8781: [ 790.784745][ T1105] #0: ffff88809f8a7090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.794261][ T1105] #1: ffffc9000188b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.805037][ T1105] 2 locks held by getty/8782: [ 790.809717][ T1105] #0: ffff88809f0a2090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.819243][ T1105] #1: ffffc9000186b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.830073][ T1105] 2 locks held by getty/8783: [ 790.834752][ T1105] #0: ffff8880a69c0090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.845982][ T1105] #1: ffffc900018ab2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.855865][ T1105] 2 locks held by getty/8784: [ 790.861708][ T1105] #0: ffff88809fba8090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.871246][ T1105] #1: ffffc900018bb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.882214][ T1105] 2 locks held by getty/8785: [ 790.886886][ T1105] #0: ffff8880a6987090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.896423][ T1105] #1: ffffc9000189b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.907185][ T1105] 2 locks held by getty/8786: [ 790.912144][ T1105] #0: ffff8880a925b090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 790.922532][ T1105] #1: ffffc900017fb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 [ 790.932477][ T1105] 2 locks held by syz-executor.0/8879: [ 790.937928][ T1105] [ 790.941519][ T1105] ============================================= [ 790.941519][ T1105] [ 790.950604][ T1105] NMI backtrace for cpu 1 [ 790.955061][ T1105] CPU: 1 PID: 1105 Comm: khungtaskd Not tainted 5.6.0-rc1-syzkaller #0 [ 790.963471][ T1105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 790.973524][ T1105] Call Trace: [ 790.976887][ T1105] dump_stack+0x1fb/0x318 [ 790.981219][ T1105] nmi_cpu_backtrace+0xaa/0x190 [ 790.986055][ T1105] ? nmi_trigger_cpumask_backtrace+0x168/0x290 [ 790.992260][ T1105] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 790.998316][ T1105] nmi_trigger_cpumask_backtrace+0x16f/0x290 [ 791.004294][ T1105] arch_trigger_cpumask_backtrace+0x10/0x20 [ 791.010247][ T1105] trigger_all_cpu_backtrace+0x17/0x20 [ 791.015693][ T1105] watchdog+0xd40/0xd60 [ 791.019861][ T1105] kthread+0x332/0x350 [ 791.024011][ T1105] ? hungtask_pm_notify+0x50/0x50 [ 791.029033][ T1105] ? kthread_blkcg+0xe0/0xe0 [ 791.033621][ T1105] ret_from_fork+0x24/0x30 [ 791.038214][ T1105] Sending NMI from CPU 1 to CPUs 0: [ 791.044035][ C0] NMI backtrace for cpu 0 [ 791.044039][ C0] CPU: 0 PID: 8879 Comm: syz-executor.0 Not tainted 5.6.0-rc1-syzkaller #0 [ 791.044044][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 791.044046][ C0] RIP: 0010:preempt_count_sub+0x6/0x190 [ 791.044054][ C0] Code: e1 07 80 c1 03 38 c1 7c 93 48 c7 c7 04 e6 69 89 e8 ef fd 60 00 83 3d 5c be 16 08 00 0f 85 ef fe ff ff eb 85 55 48 89 e5 41 56 <53> 89 fb 48 c7 c0 20 f1 43 8a 48 c1 e8 03 49 be 00 00 00 00 00 fc [ 791.044056][ C0] RSP: 0000:ffffc900017a7988 EFLAGS: 00000006 [ 791.044062][ C0] RAX: ffff888097bd4914 RBX: ffff888097bd4914 RCX: ffff888097bd4080 [ 791.044065][ C0] RDX: dffffc0000000000 RSI: ffffffff8818d11f RDI: 0000000000000200 [ 791.044069][ C0] RBP: ffffc900017a7990 R08: ffffffff817caae6 R09: fffff52001bcd20a [ 791.044072][ C0] R10: fffff52001bcd20a R11: 0000000000000000 R12: ffff888097bd48e0 [ 791.044075][ C0] R13: dffffc0000000000 R14: ffffffff86bdbb4e R15: 0000000000000200 [ 791.044079][ C0] FS: 00007f9fe7065700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 791.044082][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 791.044085][ C0] CR2: 00007fe2ca4ba140 CR3: 00000000a8e0f000 CR4: 00000000001406f0 [ 791.044089][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 791.044092][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 791.044094][ C0] Call Trace: [ 791.044096][ C0] ? htable_selective_cleanup+0x27e/0x320 [ 791.044099][ C0] __local_bh_enable_ip+0x104/0x240 [ 791.044101][ C0] ? htable_selective_cleanup+0x27e/0x320 [ 791.044104][ C0] _raw_spin_unlock_bh+0x2f/0x40 [ 791.044106][ C0] htable_selective_cleanup+0x27e/0x320 [ 791.044108][ C0] htable_put+0x213/0x2a0 [ 791.044111][ C0] hashlimit_mt_destroy_v2+0x5b/0x70 [ 791.044113][ C0] ? hashlimit_mt_check_v2+0x440/0x440 [ 791.044115][ C0] translate_table+0x1b2b/0x2230 [ 791.044118][ C0] do_ipt_set_ctl+0x2c3/0x550 [ 791.044120][ C0] nf_setsockopt+0x27a/0x2a0 [ 791.044122][ C0] ip_setsockopt+0xd8/0xf0 [ 791.044124][ C0] tcp_setsockopt+0xbe/0xd0 [ 791.044126][ C0] sock_common_setsockopt+0x99/0xb0 [ 791.044129][ C0] ? sock_common_recvmsg+0x190/0x190 [ 791.044131][ C0] __sys_setsockopt+0x582/0x720 [ 791.044133][ C0] __x64_sys_setsockopt+0xbf/0xd0 [ 791.044135][ C0] do_syscall_64+0xf7/0x1c0 [ 791.044138][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 791.044140][ C0] RIP: 0033:0x45b3b9 [ 791.044147][ 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 [ 791.044150][ C0] RSP: 002b:00007f9fe7064c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 791.044156][ C0] RAX: ffffffffffffffda RBX: 00007f9fe70656d4 RCX: 000000000045b3b9 [ 791.044159][ C0] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 791.044162][ C0] RBP: 000000000075bf20 R08: 00000000000003a8 R09: 0000000000000000 [ 791.044165][ C0] R10: 0000000020000ac0 R11: 0000000000000246 R12: 00000000ffffffff [ 791.044169][ C0] R13: 0000000000000a06 R14: 00000000004cb697 R15: 000000000075bf2c [ 791.048368][ T1105] Kernel panic - not syncing: hung_task: blocked tasks [ 791.355949][ T1105] CPU: 1 PID: 1105 Comm: khungtaskd Not tainted 5.6.0-rc1-syzkaller #0 [ 791.364179][ T1105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 791.374750][ T1105] Call Trace: [ 791.378045][ T1105] dump_stack+0x1fb/0x318 [ 791.382426][ T1105] panic+0x264/0x7a9 [ 791.386336][ T1105] ? nmi_trigger_cpumask_backtrace+0x218/0x290 [ 791.392488][ T1105] watchdog+0xd53/0xd60 [ 791.396655][ T1105] kthread+0x332/0x350 [ 791.400713][ T1105] ? hungtask_pm_notify+0x50/0x50 [ 791.405725][ T1105] ? kthread_blkcg+0xe0/0xe0 [ 791.410312][ T1105] ret_from_fork+0x24/0x30 [ 791.416298][ T1105] Kernel Offset: disabled [ 791.420629][ T1105] Rebooting in 86400 seconds..