[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.944745][ T26] audit: type=1800 audit(1569829433.017:25): pid=8594 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.965918][ T26] audit: type=1800 audit(1569829433.037:26): pid=8594 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.026400][ T26] audit: type=1800 audit(1569829433.037:27): pid=8594 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.77' (ECDSA) to the list of known hosts. syzkaller login: [ 66.697798][ T8748] IPVS: ftp: loaded support on port[0] = 21 [ 66.753249][ T8748] chnl_net:caif_netlink_parms(): no params data found [ 66.782198][ T8748] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.790437][ T8748] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.798459][ T8748] device bridge_slave_0 entered promiscuous mode [ 66.806688][ T8748] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.813996][ T8748] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.821617][ T8748] device bridge_slave_1 entered promiscuous mode [ 66.838606][ T8748] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.849274][ T8748] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.868707][ T8748] team0: Port device team_slave_0 added [ 66.876044][ T8748] team0: Port device team_slave_1 added [ 66.955540][ T8748] device hsr_slave_0 entered promiscuous mode [ 67.024177][ T8748] device hsr_slave_1 entered promiscuous mode [ 67.101357][ T8748] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.108781][ T8748] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.116663][ T8748] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.123791][ T8748] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.158224][ T8748] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.170725][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 67.190652][ T2966] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.199342][ T2966] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.209022][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 67.221160][ T8748] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.231743][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 67.240572][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.247767][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.258749][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 67.267825][ T2966] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.275040][ T2966] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.294321][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 67.303145][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 67.313923][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 67.321709][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 67.334403][ T8748] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 67.347151][ T8748] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 67.356566][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 67.372687][ T8748] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 67.409225][ T8748] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 67.417287][ T8748] #PF: supervisor instruction fetch in kernel mode [ 67.423963][ T8748] #PF: error_code(0x0010) - not-present page [ 67.429923][ T8748] PGD 91725067 P4D 91725067 PUD 9ace8067 PMD 0 [ 67.436159][ T8748] Oops: 0010 [#1] PREEMPT SMP KASAN [ 67.441423][ T8748] CPU: 1 PID: 8748 Comm: syz-executor777 Not tainted 5.3.0+ #0 [ 67.448951][ T8748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.459090][ T8748] RIP: 0010:0x0 [ 67.462813][ T8748] Code: Bad RIP value. [ 67.467637][ T8748] RSP: 0018:ffff88808c3f7848 EFLAGS: 00010246 [ 67.473691][ T8748] RAX: 0000000000000000 RBX: ffff88808bcc3740 RCX: 1ffff1101179877c [ 67.481651][ T8748] RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff888086e40ac0 [ 67.490739][ T8748] RBP: ffff88808c3f7880 R08: ffff888098708240 R09: ffffed1011798731 [ 67.498792][ T8748] R10: ffffed1011798730 R11: ffff88808bcc3987 R12: 0000000000000002 [ 67.506738][ T8748] R13: 0000000000000304 R14: ffff888086e40ac0 R15: 0000000000000000 [ 67.514687][ T8748] FS: 0000000000fa6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 67.523594][ T8748] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.530605][ T8748] CR2: ffffffffffffffd6 CR3: 000000009162a000 CR4: 00000000001406e0 [ 67.538708][ T8748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.546661][ T8748] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.554624][ T8748] Call Trace: [ 67.557901][ T8748] xsk_poll+0x1e7/0x5a0 [ 67.562042][ T8748] ? xsk_setsockopt+0x730/0x730 [ 67.566891][ T8748] sock_poll+0x15e/0x480 [ 67.571225][ T8748] ? do_recvmmsg+0x7a0/0x7a0 [ 67.575821][ T8748] do_sys_poll+0x63c/0xdd0 [ 67.580218][ T8748] ? arch_stack_walk+0x97/0xf0 [ 67.585069][ T8748] ? compat_core_sys_select+0x770/0x770 [ 67.590810][ T8748] ? __rtnl_unlock+0x36/0x90 [ 67.595483][ T8748] ? find_held_lock+0x35/0x130 [ 67.600902][ T8748] ? lock_downgrade+0x920/0x920 [ 67.605835][ T8748] ? __kasan_check_write+0x14/0x20 [ 67.611112][ T8748] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 67.616733][ T8748] ? find_held_lock+0x35/0x130 [ 67.621685][ T8748] ? poll_initwait+0x180/0x180 [ 67.626711][ T8748] ? poll_freewait+0x260/0x260 [ 67.631476][ T8748] ? mutex_unlock+0xd/0x10 [ 67.635880][ T8748] ? __rtnl_unlock+0x7c/0x90 [ 67.640537][ T8748] ? netdev_run_todo+0x559/0x7d0 [ 67.647030][ T8748] ? __kasan_check_write+0x14/0x20 [ 67.652144][ T8748] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 67.657667][ T8748] ? register_netdev+0x50/0x50 [ 67.662502][ T8748] ? wait_for_completion+0x440/0x440 [ 67.667788][ T8748] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 67.673581][ T8748] ? xdp_add_sk_umem+0x134/0x1c0 [ 67.678532][ T8748] ? rtnl_unlock+0xe/0x10 [ 67.682869][ T8748] ? xsk_bind+0x1e7/0x1190 [ 67.687367][ T8748] ? xsk_clear_rx_need_wakeup+0x100/0x100 [ 67.693067][ T8748] ? apparmor_socket_bind+0xb6/0x160 [ 67.698361][ T8748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.704585][ T8748] ? security_socket_bind+0x8d/0xc0 [ 67.709987][ T8748] ? set_user_sigmask+0x166/0x1e0 [ 67.715002][ T8748] ? sigprocmask+0x2b0/0x2b0 [ 67.719673][ T8748] ? __ia32_sys_socketpair+0xf0/0xf0 [ 67.724944][ T8748] __x64_sys_ppoll+0x259/0x310 [ 67.729697][ T8748] ? __sys_socket+0x180/0x220 [ 67.734448][ T8748] ? __ia32_sys_poll+0x470/0x470 [ 67.739561][ T8748] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 67.745005][ T8748] ? do_syscall_64+0x26/0x760 [ 67.749925][ T8748] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.755973][ T8748] ? do_syscall_64+0x26/0x760 [ 67.760642][ T8748] ? lockdep_hardirqs_on+0x421/0x5e0 [ 67.765908][ T8748] ? trace_hardirqs_on+0x67/0x240 [ 67.770909][ T8748] do_syscall_64+0xfa/0x760 [ 67.775391][ T8748] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.781270][ T8748] RIP: 0033:0x441bd9 [ 67.785143][ T8748] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.804725][ T8748] RSP: 002b:00007ffed5a78308 EFLAGS: 00000246 ORIG_RAX: 000000000000010f [ 67.813132][ T8748] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441bd9 [ 67.821082][ T8748] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000020000040 [ 67.829295][ T8748] RBP: 00007ffed5a78320 R08: 0000000000000000 R09: 0000000001bbbbbb [ 67.837249][ T8748] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 67.845208][ T8748] R13: 0000000000403170 R14: 0000000000000000 R15: 0000000000000000 [ 67.853265][ T8748] Modules linked in: [ 67.857158][ T8748] CR2: 0000000000000000 [ 67.865025][ T8748] ---[ end trace db4d13f5434c4e35 ]--- [ 67.871220][ T8748] RIP: 0010:0x0 [ 67.875452][ T8748] Code: Bad RIP value. [ 67.880023][ T8748] RSP: 0018:ffff88808c3f7848 EFLAGS: 00010246 [ 67.886955][ T8748] RAX: 0000000000000000 RBX: ffff88808bcc3740 RCX: 1ffff1101179877c [ 67.896998][ T8748] RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff888086e40ac0 [ 67.905111][ T8748] RBP: ffff88808c3f7880 R08: ffff888098708240 R09: ffffed1011798731 [ 67.913261][ T8748] R10: ffffed1011798730 R11: ffff88808bcc3987 R12: 0000000000000002 [ 67.921497][ T8748] R13: 0000000000000304 R14: ffff888086e40ac0 R15: 0000000000000000 [ 67.929885][ T8748] FS: 0000000000fa6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 67.939123][ T8748] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.948942][ T8748] CR2: ffffffffffffffd6 CR3: 000000009162a000 CR4: 00000000001406e0 [ 67.957155][ T8748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.965267][ T8748] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.973420][ T8748] Kernel panic - not syncing: Fatal exception [ 67.981470][ T8748] Kernel Offset: disabled [ 67.985857][ T8748] Rebooting in 86400 seconds..