[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.471958][ T25] audit: type=1800 audit(1574966655.787:25): pid=8678 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.505635][ T25] audit: type=1800 audit(1574966655.787:26): pid=8678 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.557612][ T25] audit: type=1800 audit(1574966655.787:27): pid=8678 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 '10.128.0.53' (ECDSA) to the list of known hosts. 2019/11/28 18:44:25 parsed 1 programs 2019/11/28 18:44:27 executed programs: 0 syzkaller login: [ 73.298408][ T8846] IPVS: ftp: loaded support on port[0] = 21 [ 73.360161][ T8846] chnl_net:caif_netlink_parms(): no params data found [ 73.385764][ T8846] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.393238][ T8846] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.401707][ T8846] device bridge_slave_0 entered promiscuous mode [ 73.409639][ T8846] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.416794][ T8846] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.424329][ T8846] device bridge_slave_1 entered promiscuous mode [ 73.442132][ T8846] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.452544][ T8846] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.472372][ T8846] team0: Port device team_slave_0 added [ 73.479589][ T8846] team0: Port device team_slave_1 added [ 73.528062][ T8846] device hsr_slave_0 entered promiscuous mode [ 73.566073][ T8846] device hsr_slave_1 entered promiscuous mode [ 73.658657][ T8846] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.737642][ T8846] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.817510][ T8846] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.867953][ T8846] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.935346][ T8846] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.942523][ T8846] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.950241][ T8846] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.957339][ T8846] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.991695][ T8846] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.004180][ T3612] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.024591][ T3612] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.043303][ T3612] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.051324][ T3612] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.062915][ T8846] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.072682][ T3077] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.081605][ T3077] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.088700][ T3077] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.107117][ T3612] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.116255][ T3612] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.123336][ T3612] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.131407][ T3612] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.140332][ T3612] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.156362][ T3077] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.164720][ T3077] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.173049][ T3077] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.182251][ T8846] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.198032][ T8848] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.205439][ T8848] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.217731][ T8846] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.339621][ T8854] ------------[ cut here ]------------ [ 74.345194][ T8854] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 74.355061][ T8854] WARNING: CPU: 1 PID: 8854 at block/blk-core.c:800 generic_make_request_checks+0x1c78/0x2190 [ 74.365308][ T8854] Kernel panic - not syncing: panic_on_warn set ... [ 74.371916][ T8854] CPU: 1 PID: 8854 Comm: blkid Not tainted 5.4.0-syzkaller #0 [ 74.379364][ T8854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74