[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.473433][ T26] audit: type=1800 audit(1563505602.190:25): pid=8918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.506874][ T26] audit: type=1800 audit(1563505602.200:26): pid=8918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.545206][ T26] audit: type=1800 audit(1563505602.200:27): pid=8918 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 '10.128.0.25' (ECDSA) to the list of known hosts. 2019/07/19 03:21:51 parsed 1 programs 2019/07/19 03:21:53 executed programs: 0 syzkaller login: [ 973.020265][ T9092] IPVS: ftp: loaded support on port[0] = 21 [ 973.087436][ T9092] chnl_net:caif_netlink_parms(): no params data found [ 973.113842][ T9092] bridge0: port 1(bridge_slave_0) entered blocking state [ 973.121894][ T9092] bridge0: port 1(bridge_slave_0) entered disabled state [ 973.129855][ T9092] device bridge_slave_0 entered promiscuous mode [ 973.138333][ T9092] bridge0: port 2(bridge_slave_1) entered blocking state [ 973.145567][ T9092] bridge0: port 2(bridge_slave_1) entered disabled state [ 973.153182][ T9092] device bridge_slave_1 entered promiscuous mode [ 973.171973][ T9092] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 973.182875][ T9092] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 973.202452][ T9092] team0: Port device team_slave_0 added [ 973.209862][ T9092] team0: Port device team_slave_1 added [ 973.277035][ T9092] device hsr_slave_0 entered promiscuous mode [ 973.325595][ T9092] device hsr_slave_1 entered promiscuous mode [ 973.373513][ T9092] bridge0: port 2(bridge_slave_1) entered blocking state [ 973.380747][ T9092] bridge0: port 2(bridge_slave_1) entered forwarding state [ 973.388595][ T9092] bridge0: port 1(bridge_slave_0) entered blocking state [ 973.395733][ T9092] bridge0: port 1(bridge_slave_0) entered forwarding state [ 973.430456][ T9092] 8021q: adding VLAN 0 to HW filter on device bond0 [ 973.441601][ T3626] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 973.461834][ T3626] bridge0: port 1(bridge_slave_0) entered disabled state [ 973.470183][ T3626] bridge0: port 2(bridge_slave_1) entered disabled state [ 973.479352][ T3626] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 973.491927][ T9092] 8021q: adding VLAN 0 to HW filter on device team0 [ 973.502799][ T2824] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 973.511553][ T2824] bridge0: port 1(bridge_slave_0) entered blocking state [ 973.518703][ T2824] bridge0: port 1(bridge_slave_0) entered forwarding state [ 973.537178][ T9098] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 973.546083][ T9098] bridge0: port 2(bridge_slave_1) entered blocking state [ 973.553132][ T9098] bridge0: port 2(bridge_slave_1) entered forwarding state [ 973.561689][ T9098] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 973.571366][ T9098] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 973.586821][ T9092] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 973.598166][ T9092] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 973.610774][ T2824] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 973.619375][ T2824] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 973.628086][ T2824] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 973.636746][ T2824] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 973.652613][ T9092] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 977.796747][ T9142] WARNING: CPU: 0 PID: 9142 at kernel/fork.c:677 __mmdrop+0x26a/0x320 [ 977.804977][ T9142] Kernel panic - not syncing: panic_on_warn set ... [ 977.811578][ T9142] CPU: 0 PID: 9142 Comm: syz-executor.0 Not tainted 5.2.0-next-20190718 #41 [ 977.820301][ T9142] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 977.830346][ T9142] Call Trace: [ 977.833766][ T9142] dump_stack+0x172/0x1f0 [ 977.838803][ T9142] ? __mmdrop+0x170/0x320 [ 977.844965][ T9142] panic+0x2dc/0x755 [ 977.848852][ T9142] ? add_taint.cold+0x16/0x16 [ 977.853518][ T9142] ? __kasan_check_write+0x14/0x20 [ 977.858621][ T9142] ? __warn.cold+0x5/0x4c [ 977.862940][ T9142] ? __warn+0xe7/0x1e0 [ 977.866992][ T9142] ? __mmdrop+0x26a/0x320 [ 977.871307][ T9142] __warn.cold+0x20/0x4c [ 977.875557][ T9142] ? trace_hardirqs_on+0x67/0x240 [ 977.880569][ T9142] ? __mmdrop+0x26a/0x320 [ 977.884887][ T9142] report_bug+0x263/0x2b0 [ 977.889210][ T9142] do_error_trap+0x11b/0x200 [ 977.893797][ T9142] do_invalid_op+0x37/0x50 [ 977.898204][ T9142] ? __mmdrop+0x26a/0x320 [ 977.902618][ T9142] invalid_op+0x14/0x20 [ 977.906769][ T9142] RIP: 0010:__mmdrop+0x26a/0x320 [ 977.911692][ T9142] Code: 5f 5d c3 e8 18 7e 2f 00 4c 89 ef e8 60 d7 2b 00 eb d2 e8 09 7e 2f 00 0f 0b e8 02 7e 2f 00 0f 0b e9 fa fd ff ff e8 f6 7d 2f 00 <0f> 0b e9 2b fe ff ff e8 ea 7d 2f 00 4c 89 e7 e8 a2 f7 67 00 e9 85 [ 977.931302][ T9142] RSP: 0018:ffff8880a176fac0 EFLAGS: 00010293 [ 977.937370][ T9142] RAX: ffff888098f02600 RBX: ffff888098f02600 RCX: ffffffff81430bab [ 977.945361][ T9142] RDX: 0000000000000000 RSI: ffffffff814306fa RDI: ffff888098f02a30 [ 977.953323][ T9142] RBP: ffff8880a176fae8 R08: ffff888098f02600 R09: ffffed10148dd4ec [ 977.961292][ T9142] R10: ffffed10148dd4eb R11: ffff8880a46ea75f R12: ffff8880a46ea700 [ 977.969253][ T9142] R13: ffff8880a46ea828 R14: ffff8880a46eac50 R15: 0000000000000000 [ 977.977228][ T9142] ? mmput+0x3db/0x4d0 [ 977.981314][ T9142] ? __mmdrop+0x26a/0x320 [ 977.985640][ T9142] mmput+0x3f0/0x4d0 [ 977.989528][ T9142] do_exit+0x84e/0x2ea0 [ 977.993676][ T9142] ? mm_update_next_owner+0x640/0x640 [ 977.999038][ T9142] ? lock_downgrade+0x920/0x920 [ 978.003898][ T9142] ? _raw_spin_unlock_irq+0x28/0x90 [ 978.009087][ T9142] ? get_signal+0x392/0x2500 [ 978.013665][ T9142] ? _raw_spin_unlock_irq+0x28/0x90 [ 978.018857][ T9142] do_group_exit+0x135/0x360 [ 978.023441][ T9142] get_signal+0x47c/0x2500 [ 978.027880][ T9142] ? do_vfs_ioctl+0x120/0x13e0 [ 978.032636][ T9142] do_signal+0x87/0x1700 [ 978.036864][ T9142] ? __fget+0x384/0x560 [ 978.041009][ T9142] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 978.047237][ T9142] ? setup_sigcontext+0x7d0/0x7d0 [ 978.052248][ T9142] ? kick_process+0xef/0x180 [ 978.056826][ T9142] ? exit_to_usermode_loop+0x43/0x380 [ 978.062191][ T9142] ? do_syscall_64+0x5a9/0x6a0 [ 978.066944][ T9142] ? exit_to_usermode_loop+0x43/0x380 [ 978.072306][ T9142] ? lockdep_hardirqs_on+0x418/0x5d0 [ 978.077583][ T9142] ? trace_hardirqs_on+0x67/0x240 [ 978.082600][ T9142] exit_to_usermode_loop+0x286/0x380 [ 978.087880][ T9142] do_syscall_64+0x5a9/0x6a0 [ 978.092462][ T9142] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 978.098339][ T9142] RIP: 0033:0x459819 [ 978.102220][ T9142] Code: Bad RIP value. [ 978.106262][ T9142] RSP: 002b:00007f75afccbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 978.114656][ T9142] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000459819 [ 978.122639][ T9142] RDX: 00000000200023c0 RSI: 000000004028af11 RDI: 0000000000000003 [ 978.130603][ T9142] RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 [ 978.138571][ T9142] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75afccc6d4 [ 978.146538][ T9142] R13: 00000000004c4722 R14: 00000000004d87d0 R15: 00000000ffffffff [ 978.155618][ T9142] Kernel Offset: disabled [ 978.160007][ T9142] Rebooting in 86400 seconds..