[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 29.151717] kauditd_printk_skb: 7 callbacks suppressed [ 29.151729] audit: type=1800 audit(1544736268.162:29): pid=5875 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.180018] audit: type=1800 audit(1544736268.162:30): pid=5875 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.434221] sshd (6014) used greatest stack depth: 15600 bytes left Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. [ 134.694645] IPVS: ftp: loaded support on port[0] = 21 [ 134.695988] IPVS: ftp: loaded support on port[0] = 21 [ 134.709095] IPVS: ftp: loaded support on port[0] = 21 [ 134.712589] IPVS: ftp: loaded support on port[0] = 21 [ 134.729948] IPVS: ftp: loaded support on port[0] = 21 [ 134.737993] IPVS: ftp: loaded support on port[0] = 21 [ 135.593928] bridge0: port 1(bridge_slave_0) entered blocking state [ 135.614633] bridge0: port 1(bridge_slave_0) entered disabled state [ 135.628976] device bridge_slave_0 entered promiscuous mode [ 135.640414] bridge0: port 1(bridge_slave_0) entered blocking state [ 135.646914] bridge0: port 1(bridge_slave_0) entered disabled state [ 135.656058] device bridge_slave_0 entered promiscuous mode [ 135.677536] bridge0: port 1(bridge_slave_0) entered blocking state [ 135.683921] bridge0: port 1(bridge_slave_0) entered disabled state [ 135.694628] device bridge_slave_0 entered promiscuous mode [ 135.704584] bridge0: port 1(bridge_slave_0) entered blocking state [ 135.714447] bridge0: port 1(bridge_slave_0) entered disabled state [ 135.722644] device bridge_slave_0 entered promiscuous mode [ 135.729616] bridge0: port 1(bridge_slave_0) entered blocking state [ 135.736069] bridge0: port 1(bridge_slave_0) entered disabled state [ 135.744900] device bridge_slave_0 entered promiscuous mode [ 135.753979] bridge0: port 2(bridge_slave_1) entered blocking state [ 135.764980] bridge0: port 2(bridge_slave_1) entered disabled state [ 135.772164] device bridge_slave_1 entered promiscuous mode [ 135.781336] bridge0: port 2(bridge_slave_1) entered blocking state [ 135.788333] bridge0: port 2(bridge_slave_1) entered disabled state [ 135.795833] device bridge_slave_1 entered promiscuous mode [ 135.814211] bridge0: port 2(bridge_slave_1) entered blocking state [ 135.826925] bridge0: port 2(bridge_slave_1) entered disabled state [ 135.834344] device bridge_slave_1 entered promiscuous mode [ 135.841865] bridge0: port 2(bridge_slave_1) entered blocking state [ 135.852332] bridge0: port 2(bridge_slave_1) entered disabled state [ 135.860065] device bridge_slave_1 entered promiscuous mode [ 135.867084] bridge0: port 2(bridge_slave_1) entered blocking state [ 135.873449] bridge0: port 2(bridge_slave_1) entered disabled state [ 135.885110] device bridge_slave_1 entered promiscuous mode [ 135.893714] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 135.905259] bridge0: port 1(bridge_slave_0) entered blocking state [ 135.913247] bridge0: port 1(bridge_slave_0) entered disabled state [ 135.921150] device bridge_slave_0 entered promiscuous mode [ 135.930447] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 135.943355] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 135.955838] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 135.966245] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 135.979041] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 135.992362] bridge0: port 2(bridge_slave_1) entered blocking state [ 136.014493] bridge0: port 2(bridge_slave_1) entered disabled state [ 136.022711] device bridge_slave_1 entered promiscuous mode [ 136.031313] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 136.051009] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 136.062774] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 136.072346] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 136.089372] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 136.155170] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 136.211593] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 136.285134] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 136.306063] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 136.321432] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 136.332323] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 136.360042] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 136.374131] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 136.393485] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 136.412286] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 136.428259] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 136.440832] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 136.451168] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 136.466229] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 136.474796] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 136.486699] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 136.508826] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 136.526088] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 136.536685] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 136.561745] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 136.584356] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 136.600399] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 136.612961] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 136.622708] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 136.637872] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 136.736591] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 136.749546] team0: Port device team_slave_0 added [ 136.757984] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 136.769687] team0: Port device team_slave_0 added [ 136.828479] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 136.847209] team0: Port device team_slave_1 added [ 136.886124] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 136.900475] team0: Port device team_slave_0 added [ 136.905812] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 136.918902] team0: Port device team_slave_1 added [ 136.927132] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 136.934510] team0: Port device team_slave_0 added [ 136.943398] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 136.954098] team0: Port device team_slave_0 added [ 136.963282] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 136.981093] team0: Port device team_slave_0 added [ 136.991064] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 137.023716] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 137.036526] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 137.046487] team0: Port device team_slave_1 added [ 137.052248] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 137.061993] team0: Port device team_slave_1 added [ 137.068776] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 137.084992] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 137.092774] team0: Port device team_slave_1 added [ 137.100052] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 137.111044] team0: Port device team_slave_1 added [ 137.122554] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 137.135153] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 137.147814] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 137.155428] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.176561] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.197851] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 137.205653] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 137.215556] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 137.226480] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 137.241967] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 137.249387] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 137.256377] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.272718] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 137.287336] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 137.295078] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 137.302732] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 137.310480] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 137.320276] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 137.328323] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 137.338187] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 137.345207] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 137.368181] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.376206] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.391185] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.403861] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.412089] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 137.419957] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 137.427528] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.435205] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.445527] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 137.455606] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 137.468975] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 137.484694] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 137.497582] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 137.505134] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.514576] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 137.522909] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.531826] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 137.541201] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 137.549527] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 137.575411] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.593536] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.617320] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.626133] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 137.636479] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 137.647078] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 137.678033] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.692026] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.717860] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.727230] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 137.748941] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 137.765635] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.774277] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 138.238373] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.244865] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.251962] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.258382] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.266041] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 138.313277] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.319754] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.326476] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.332917] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.348088] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available [ 138.369892] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.376287] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.383038] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.389468] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.403587] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available [ 138.459558] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.465960] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.472676] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.479079] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.492511] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 138.553628] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.560085] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.566762] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.573215] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.591087] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 138.599201] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.605571] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.612289] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.618724] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.627175] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 139.226997] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 139.235249] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 139.258457] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready RTNETLINK answers: Operation not supported [ 139.277053] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 139.284325] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 139.292391] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 141.080560] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.219523] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.238029] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.384416] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.408427] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 141.428207] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.463538] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 141.494843] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 141.577873] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.657214] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 141.669622] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 141.680586] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 141.711326] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 141.721156] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 141.731552] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 141.744102] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 141.765976] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 141.841596] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 141.863029] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 141.875253] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 141.885766] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 141.946305] 8021q: adding VLAN 0 to HW filter on device team0 [ 142.010713] 8021q: adding VLAN 0 to HW filter on device team0 [ 142.034663] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 142.047068] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 142.058539] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 142.076535] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 142.097575] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 142.105014] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 142.145481] 8021q: adding VLAN 0 to HW filter on device team0 [ 142.216058] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 142.231418] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 142.241903] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 142.329703] 8021q: adding VLAN 0 to HW filter on device team0 [ 142.384018] 8021q: adding VLAN 0 to HW filter on device team0 [ 142.447842] 8021q: adding VLAN 0 to HW filter on device team0 [ 211.138175] ------------[ cut here ]------------ [ 211.138181] DEBUG_LOCKS_WARN_ON(depth >= MAX_LOCK_DEPTH) [ 211.138186] ------------[ cut here ]------------ [ 211.138196] Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1272, size 2)! [ 211.138202] WARNING: CPU: 1 PID: -642489280 at mm/usercopy.c:83 usercopy_warn+0xee/0x110 [ 211.138216] Kernel panic - not syncing: panic_on_warn set ... [ 211.138223] CPU: 1 PID: -642489280 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181213+ #170 [ 211.138230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 211.138233] Call Trace: [ 211.139410] Kernel Offset: disabled