[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.511947] audit: type=1800 audit(1546886467.763:25): pid=7821 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.544960] audit: type=1800 audit(1546886467.773:26): pid=7821 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.585427] audit: type=1800 audit(1546886467.773:27): pid=7821 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 '10.128.0.115' (ECDSA) to the list of known hosts. syzkaller login: [ 96.058678] IPVS: ftp: loaded support on port[0] = 21 [ 96.115255] chnl_net:caif_netlink_parms(): no params data found [ 96.144983] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.151615] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.158761] device bridge_slave_0 entered promiscuous mode [ 96.165920] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.172289] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.179350] device bridge_slave_1 entered promiscuous mode [ 96.194426] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 96.203140] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 96.219254] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 96.226604] team0: Port device team_slave_0 added [ 96.231895] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 96.239007] team0: Port device team_slave_1 added [ 96.244181] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 96.251451] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 96.336932] device hsr_slave_0 entered promiscuous mode [ 96.405544] device hsr_slave_1 entered promiscuous mode [ 96.475202] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 96.482116] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 96.495824] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.502249] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.509076] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.515516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.546379] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 96.552559] 8021q: adding VLAN 0 to HW filter on device bond0 [ 96.561698] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 96.570629] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 96.590403] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.598237] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.605601] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 96.615601] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 96.621688] 8021q: adding VLAN 0 to HW filter on device team0 [ 96.630399] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 96.638256] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.644579] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.666072] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 96.673832] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.680247] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.689262] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 96.697128] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 96.704898] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 96.712267] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 96.720071] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 96.727814] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 96.733854] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 96.746229] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 96.756192] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 120.949428] ================================================================== [ 120.956885] BUG: KASAN: stack-out-of-bounds in debug_lockdep_rcu_enabled.part.0+0x50/0x60 [ 120.965202] Read of size 4 at addr ffff8880a94c8cbc by task è¤<‰ÿÿÿÿ0kÿÿÿÿÈ‹L©€ˆÿÿ^9hÿÿÿÿ³ŠµA/-2123883558 [ 120.975156] [ 120.976796] CPU: 1 PID: -2123883558 Comm: ÿO2ñÿÿÿýO2ñÿûÿÿ Not tainted 5.0.0-rc1+ #14 [ 120.984772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.994568] Call Trace: [ 120.997151] [ 120.998784] Allocated by task 0: [ 121.002163] save_stack+0x45/0xd0 [ 121.005620] kasan_kmalloc+0xcf/0xe0 [ 121.009341] __kmalloc_node+0x4e/0x70 [ 121.013146] setup_kmem_cache_node+0x12a/0x420 [ 121.017734] __do_tune_cpucache+0x161/0x220 [ 121.022071] do_tune_cpucache+0x25/0xd0 [ 121.026048] enable_cpucache+0x3e/0xd0 [ 121.029942] setup_cpu_cache+0xd4/0x1e0 [ 121.033924] __kmem_cache_create+0x1bb/0x270 [ 121.038339] create_cache+0xd4/0x200 [ 121.042057] kmem_cache_create_usercopy+0x1a5/0x260 [ 121.047108] kmem_cache_create+0x11/0x20 [ 121.051260] acpi_os_create_cache+0x2c/0x70 [ 121.055606] acpi_ut_create_caches+0xfc/0x10b [ 121.060109] acpi_ut_init_globals+0x15/0xbcd [ 121.064519] acpi_initialize_subsystem+0x82/0x155 [ 121.069367] acpi_early_init+0x170/0x44f [ 121.073436] start_kernel+0x795/0x8bd [ 121.077240] x86_64_start_reservations+0x29/0x2b [ 121.081997] x86_64_start_kernel+0x77/0x7b [ 121.086249] secondary_startup_64+0xa4/0xb0 [ 121.090570] [ 121.092197] Freed by task 2451541440: [ 121.096003] ------------[ cut here ]------------ [ 121.100777] Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'task_struct' (offset 600, size 1)! [ 121.113468] ------------[ cut here ]------------ [ 121.118230] kernel BUG at mm/slab.c:4412! [ 121.122462] WARNING: CPU: 1 PID: -1454601544 at kernel/rcu/tree_plugin.h:444 __rcu_read_unlock+0x1af/0x210 [ 121.132255] Kernel panic - not syncing: panic_on_warn set ... [ 121.138155] CPU: 1 PID: -1454601544 Comm: Ç÷q®€ˆÿÿø>Îíÿÿù>Î Not tainted 5.0.0-rc1+ #14 [ 121.146465] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.155821] Call Trace: [ 121.159427] Kernel Offset: disabled [ 121.163146] Rebooting in 86400 seconds..