[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.542224] kauditd_printk_skb: 8 callbacks suppressed [ 29.542239] audit: type=1800 audit(1544057267.691:29): pid=5921 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 [ 29.569703] audit: type=1800 audit(1544057267.691:30): pid=5921 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: [ 34.405077] sshd (6061) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.15.236' (ECDSA) to the list of known hosts. [ 41.171866] IPVS: ftp: loaded support on port[0] = 21 [ 41.212668] IPVS: ftp: loaded support on port[0] = 21 [ 41.215483] IPVS: ftp: loaded support on port[0] = 21 [ 41.224437] IPVS: ftp: loaded support on port[0] = 21 [ 41.224900] IPVS: ftp: loaded support on port[0] = 21 [ 41.232634] IPVS: ftp: loaded support on port[0] = 21 [ 42.039082] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.051957] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.065992] device bridge_slave_0 entered promiscuous mode [ 42.118371] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.128015] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.135938] device bridge_slave_0 entered promiscuous mode [ 42.151996] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.159862] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.171802] device bridge_slave_1 entered promiscuous mode [ 42.189253] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.197326] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.205052] device bridge_slave_0 entered promiscuous mode [ 42.227200] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.238092] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.245376] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.253702] device bridge_slave_0 entered promiscuous mode [ 42.262216] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.268590] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.276349] device bridge_slave_1 entered promiscuous mode [ 42.284529] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.294088] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.302428] device bridge_slave_0 entered promiscuous mode [ 42.311243] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.318589] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.327146] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.335105] device bridge_slave_0 entered promiscuous mode [ 42.342497] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.348882] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.359738] device bridge_slave_1 entered promiscuous mode [ 42.368368] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.376236] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.384381] device bridge_slave_1 entered promiscuous mode [ 42.392750] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.409359] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.422563] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.429987] device bridge_slave_1 entered promiscuous mode [ 42.440808] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.447177] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.462025] device bridge_slave_1 entered promiscuous mode [ 42.471893] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.480863] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.492607] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.515521] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.527911] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.544132] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.561244] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.589639] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.602565] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.611618] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.677168] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.780101] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 42.796932] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 42.815303] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.828725] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.841957] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.853574] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.867412] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 42.885001] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 42.904190] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.919545] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.946016] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.963353] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.972323] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.003294] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.039445] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 43.073337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 43.104001] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.123807] team0: Port device team_slave_0 added [ 43.215802] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.223547] team0: Port device team_slave_1 added [ 43.281439] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.336300] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.349353] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.358449] team0: Port device team_slave_0 added [ 43.365564] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.377064] team0: Port device team_slave_0 added [ 43.394709] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.413695] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.422613] team0: Port device team_slave_0 added [ 43.428633] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.440003] team0: Port device team_slave_0 added [ 43.446389] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.455257] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.466754] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.479102] team0: Port device team_slave_0 added [ 43.489831] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.499453] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.507643] team0: Port device team_slave_1 added [ 43.515837] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.525438] team0: Port device team_slave_1 added [ 43.532767] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.544625] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.555208] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.566513] team0: Port device team_slave_1 added [ 43.579471] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.590116] team0: Port device team_slave_1 added [ 43.597321] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.611703] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.619060] team0: Port device team_slave_1 added [ 43.635748] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.682030] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.689934] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.731716] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.739250] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.747177] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.757584] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.766996] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 43.779958] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.791949] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.802113] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.809981] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 43.820346] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.831241] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.838930] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.847243] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 43.856569] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 43.866093] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.875837] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.889661] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 43.903462] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.923265] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 43.932036] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.939604] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.947577] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.955338] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.963327] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.971464] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.980968] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.990235] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 44.012814] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 44.021585] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 44.031521] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 44.056216] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 44.064510] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 44.072552] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 44.080222] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 44.088362] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 44.096346] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 44.118166] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 44.130132] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 44.161172] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 44.169114] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 44.189715] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 44.197663] 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 [ 44.603091] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.609651] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.616719] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.623130] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.633261] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.708304] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready RTNETLINK answers: No buffer space available [ 44.848901] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.855377] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.862118] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.868511] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.881056] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported [ 44.899961] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.906410] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.913127] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.919531] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.929614] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.955369] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.961867] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.968549] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.974994] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.998526] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available [ 45.008052] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.014542] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.021250] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.027621] bridge0: port 1(bridge_slave_0) entered forwarding state [ 45.037361] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 45.055548] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.061988] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.068679] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.075122] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available [ 45.099714] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported 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 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 45.743417] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.753052] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.761333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.769520] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.778006] 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: Invalid argument 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: 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 [ 47.702780] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.775524] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.791143] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.871459] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.896096] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.938857] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.955654] 8021q: adding VLAN 0 to HW filter on device bond0 [ 48.035331] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.065467] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.183266] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.189465] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.203616] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.215015] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.227029] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.239115] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.303016] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.309246] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.321166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.344694] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.361789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.372457] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.475403] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.497645] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.513117] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.520267] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.546998] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.566295] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.580320] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.594296] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.605325] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.627548] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.649234] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.675998] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.816595] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.831717] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.848965] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.662314] ------------[ cut here ]------------ [ 59.667134] DEBUG_LOCKS_WARN_ON(!hlock->nest_lock) [ 59.667155] ------------[ cut here ]------------ [ 59.676839] Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'task_struct' (offset 1432, size 2)! [ 59.689653] WARNING: CPU: 1 PID: 38 at mm/usercopy.c:83 usercopy_warn+0xee/0x110 [ 59.697193] Kernel panic - not syncing: panic_on_warn set ... [ 59.703089] CPU: 1 PID: 38 Comm: فd Not tainted 4.20.0-rc4+ #328 [ 59.710447] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.719981] ------------[ cut here ]------------ [ 59.724742] kernel BUG at mm/slab.c:4425! [ 59.728989] WARNING: CPU: 1 PID: 38 at kernel/rcu/tree_plugin.h:438 __rcu_read_unlock+0x266/0x2e0 [ 59.737999] Modules linked in: [ 59.741205] CPU: 1 PID: 38 Comm: فd Not tainted 4.20.0-rc4+ #328 [ 59.748585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.758006] usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1328, size 23)! [ 59.768801] ------------[ cut here ]------------ [ 59.773557] kernel BUG at mm/usercopy.c:102! [ 59.778058] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 59.783437] CPU: 1 PID: 38 Comm: فd Not tainted 4.20.0-rc4+ #328 [ 59.790796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.800196] RIP: 0010:usercopy_abort+0xbb/0xbd [ 59.801199] ================================================================== [ 59.804789] Code: c0 e8 47 ae b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 00 dc 34 88 ff 75 d0 41 57 e8 27 fa 97 ff <0f> 0b e8 1c ae b1 ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31 [ 59.812161] BUG: KASAN: stack-out-of-bounds in update_curr+0x9c0/0xbd0 [ 59.831046] RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086 [ 59.837695] Read of size 8 at addr ffff8881d9b4a4c0 by task ksoftirqd/0/9 [ 59.843038] RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000 [ 59.849952] [ 59.857217] RDX: 0000000000000000 RSI: ffffffff8165eae5 RDI: 0000000000000005 [ 59.866079] RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8 [ 59.873365] R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914f7c5 [ 59.880649] R13: ffffffff8834da60 R14: ffffffff8834d9a0 R15: ffffffff8834d960 [ 59.887931] FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 59.896149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.902032] CR2: 0000000000000130 CR3: 00000001c0c40000 CR4: 00000000001406e0 [ 59.909297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.916562] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.923823] Call Trace: [ 59.926397] Modules linked in: [ 59.929700] ---[ end trace 493415bf77afa5f9 ]--- [ 59.934528] RIP: 0010:usercopy_abort+0xbb/0xbd [ 59.939104] Code: c0 e8 47 ae b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 00 dc 34 88 ff 75 d0 41 57 e8 27 fa 97 ff <0f> 0b e8 1c ae b1 ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31 [ 59.958045] RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086 [ 59.963418] RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000 [ 59.970682] RDX: 0000000000000000 RSI: ffffffff8165eae5 RDI: 0000000000000005 [ 59.977963] RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8 [ 59.985229] R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914f7c5 [ 59.992492] R13: ffffffff8834da60 R14: ffffffff8834d9a0 R15: ffffffff8834d960 [ 59.999771] FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 60.007994] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.013867] CR2: 0000000000000130 CR3: 00000001c0c40000 CR4: 00000000001406e0 [ 60.021139] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.028407] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.035667] Kernel panic - not syncing: Fatal exception in interrupt [ 61.235856] Shutting down cpus with NMI [ 61.240861] Kernel Offset: disabled [ 61.244613] Rebooting in 86400 seconds..