[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 30.384447] audit: type=1800 audit(1541203263.102:33): pid=5641 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.413158] audit: type=1800 audit(1541203263.102:34): pid=5641 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.684114] audit: type=1400 audit(1541203266.402:35): avc: denied { map } for pid=5818 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 33.721248] sshd (5816) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. [ 40.548272] audit: type=1400 audit(1541203273.272:36): avc: denied { map } for pid=5833 comm="syz-executor097" path="/root/syz-executor097649569" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 40.560756] IPVS: ftp: loaded support on port[0] = 21 [ 40.742358] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.749934] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.756939] device bridge_slave_0 entered promiscuous mode [ 40.775949] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.782467] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.789892] device bridge_slave_1 entered promiscuous mode [ 40.808879] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.827234] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.880623] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 40.901252] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 40.981062] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.988601] team0: Port device team_slave_0 added [ 41.006805] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 41.014139] team0: Port device team_slave_1 added [ 41.031762] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 41.052305] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 41.071611] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.092914] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 41.242963] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.249480] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.256371] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.262921] bridge0: port 1(bridge_slave_0) entered forwarding state 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 [ 41.791468] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.844177] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.897073] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.903475] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.911420] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.962001] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 42.255153] audit: type=1400 audit(1541203274.972:37): avc: denied { prog_load } for pid=6073 comm="syz-executor097" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 42.281038] audit: type=1400 audit(1541203275.002:38): avc: denied { prog_run } for pid=6073 comm="syz-executor097" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 42.281365] ================================================================== [ 42.311023] BUG: KASAN: slab-out-of-bounds in ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 42.318805] Read of size 1 at addr ffff8801be2df547 by task syz-executor097/6073 [ 42.326323] [ 42.327945] CPU: 1 PID: 6073 Comm: syz-executor097 Not tainted 4.19.0+ #95 [ 42.334943] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.344282] Call Trace: [ 42.346864] dump_stack+0x244/0x39d [ 42.350486] ? dump_stack_print_info.cold.1+0x20/0x20 [ 42.355671] ? printk+0xa7/0xcf [ 42.358947] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 42.363699] print_address_description.cold.7+0x9/0x1ff [ 42.369055] kasan_report.cold.8+0x242/0x309 [ 42.373453] ? ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 42.378548] __asan_report_load1_noabort+0x14/0x20 [ 42.383465] ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 42.388392] ip6_tnl_start_xmit+0x49f/0x25a0 [ 42.392849] ? ip6_tnl_xmit+0x3730/0x3730 [ 42.397002] ? mark_held_locks+0x130/0x130 [ 42.401354] ? zap_class+0x640/0x640 [ 42.405058] ? __lock_acquire+0x62f/0x4c20 [ 42.409289] ? zap_class+0x640/0x640 [ 42.412989] ? zap_class+0x640/0x640 [ 42.416694] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.422225] ? check_preemption_disabled+0x48/0x280 [ 42.427325] ? __lock_is_held+0xb5/0x140 [ 42.431413] dev_hard_start_xmit+0x295/0xc90 [ 42.435836] ? dev_direct_xmit+0x6b0/0x6b0 [ 42.440232] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 42.445810] ? netif_skb_features+0x690/0xb70 [ 42.450299] ? rcu_softirq_qs+0x20/0x20 [ 42.454263] ? validate_xmit_xfrm+0x1ef/0xda0 [ 42.458754] ? validate_xmit_skb+0x80c/0xf30 [ 42.463156] ? netif_skb_features+0xb70/0xb70 [ 42.467648] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.473173] ? check_preemption_disabled+0x48/0x280 [ 42.478236] ? check_preemption_disabled+0x48/0x280 [ 42.483256] __dev_queue_xmit+0x2f71/0x3ad0 [ 42.487566] ? save_stack+0x43/0xd0 [ 42.491177] ? kasan_kmalloc+0xc7/0xe0 [ 42.495062] ? __kmalloc_node_track_caller+0x50/0x70 [ 42.500157] ? netdev_pick_tx+0x310/0x310 [ 42.504302] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.509830] ? check_preemption_disabled+0x48/0x280 [ 42.514844] ? __lock_is_held+0xb5/0x140 [ 42.518902] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 42.523910] ? skb_release_data+0x1c4/0x880 [ 42.528226] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 42.533590] ? kasan_unpoison_shadow+0x35/0x50 [ 42.538163] ? skb_tx_error+0x2f0/0x2f0 [ 42.542252] ? __kmalloc_node_track_caller+0x50/0x70 [ 42.547350] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.552885] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 42.558412] ? kasan_check_write+0x14/0x20 [ 42.562639] ? pskb_expand_head+0x6b3/0x10f0 [ 42.567036] ? find_held_lock+0x36/0x1c0 [ 42.571087] ? skb_release_data+0x880/0x880 [ 42.575396] ? __alloc_skb+0x770/0x770 [ 42.579274] ? __lock_is_held+0xb5/0x140 [ 42.583331] ? kasan_check_write+0x14/0x20 [ 42.587554] ? __skb_clone+0x6c7/0xa00 [ 42.591432] ? __copy_skb_header+0x6b0/0x6b0 [ 42.595831] ? kmem_cache_alloc+0x33a/0x730 [ 42.600148] ? depot_save_stack+0x292/0x470 [ 42.604464] ? skb_ensure_writable+0x15e/0x640 [ 42.609042] dev_queue_xmit+0x17/0x20 [ 42.612833] ? dev_queue_xmit+0x17/0x20 [ 42.616800] __bpf_redirect+0x5cf/0xb20 [ 42.620772] bpf_clone_redirect+0x2f6/0x490 [ 42.625088] bpf_prog_759a992c578a3894+0x81e/0x1000 [ 42.630097] ? bpf_test_run+0x175/0x780 [ 42.634061] ? lock_downgrade+0x900/0x900 [ 42.638205] ? ktime_get+0x332/0x400 [ 42.641912] ? find_held_lock+0x36/0x1c0 [ 42.645967] ? lock_acquire+0x1ed/0x520 [ 42.649930] ? bpf_test_run+0x3cb/0x780 [ 42.653897] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.659424] ? check_preemption_disabled+0x48/0x280 [ 42.664439] ? kasan_check_read+0x11/0x20 [ 42.668573] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 42.673836] ? rcu_softirq_qs+0x20/0x20 [ 42.677810] ? bpf_cgroup_storage_release+0x220/0x220 [ 42.683070] ? skb_try_coalesce+0x1b70/0x1b70 [ 42.687741] ? bpf_test_run+0x25d/0x780 [ 42.691715] ? netlink_diag_dump+0x2a0/0x2a0 [ 42.696113] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.701651] ? bpf_test_init.isra.10+0x70/0x100 [ 42.706332] ? bpf_prog_test_run_skb+0x73b/0xcb0 [ 42.711080] ? bpf_test_finish.isra.9+0x1f0/0x1f0 [ 42.715911] ? bpf_prog_add+0x69/0xd0 [ 42.719707] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.725282] ? __bpf_prog_get+0x9b/0x290 [ 42.729415] ? bpf_test_finish.isra.9+0x1f0/0x1f0 [ 42.734252] ? bpf_prog_test_run+0x130/0x1a0 [ 42.738649] ? __x64_sys_bpf+0x3d8/0x520 [ 42.742696] ? bpf_prog_get+0x20/0x20 [ 42.746494] ? do_syscall_64+0x1b9/0x820 [ 42.750541] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.755897] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.760888] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.765839] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.770859] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.775868] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.781409] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.786417] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.791253] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.796607] [ 42.798220] Allocated by task 6073: [ 42.801841] save_stack+0x43/0xd0 [ 42.805442] kasan_kmalloc+0xc7/0xe0 [ 42.809147] __kmalloc_node_track_caller+0x50/0x70 [ 42.814063] __kmalloc_reserve.isra.40+0x41/0xe0 [ 42.818805] pskb_expand_head+0x230/0x10f0 [ 42.823025] skb_ensure_writable+0x3dd/0x640 [ 42.827426] bpf_clone_redirect+0x14a/0x490 [ 42.831746] bpf_prog_759a992c578a3894+0x81e/0x1000 [ 42.836739] [ 42.838356] Freed by task 4139: [ 42.841635] save_stack+0x43/0xd0 [ 42.845086] __kasan_slab_free+0x102/0x150 [ 42.849306] kasan_slab_free+0xe/0x10 [ 42.853092] kfree+0xcf/0x230 [ 42.856190] load_elf_binary+0x25a8/0x5620 [ 42.860415] search_binary_handler+0x17d/0x570 [ 42.864984] __do_execve_file.isra.33+0x1661/0x25d0 [ 42.869990] __x64_sys_execve+0x8f/0xc0 [ 42.873952] do_syscall_64+0x1b9/0x820 [ 42.877828] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.883000] [ 42.884625] The buggy address belongs to the object at ffff8801be2df340 [ 42.884625] which belongs to the cache kmalloc-512 of size 512 [ 42.897333] The buggy address is located 7 bytes to the right of [ 42.897333] 512-byte region [ffff8801be2df340, ffff8801be2df540) [ 42.909799] The buggy address belongs to the page: [ 42.914717] page:ffffea0006f8b7c0 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 [ 42.922852] flags: 0x2fffc0000000200(slab) [ 42.927077] raw: 02fffc0000000200 ffffea0006f6a948 ffffea0006f90a08 ffff8801da800940 [ 42.935052] raw: 0000000000000000 ffff8801be2df0c0 0000000100000006 0000000000000000 [ 42.942916] page dumped because: kasan: bad access detected [ 42.948604] [ 42.950420] Memory state around the buggy address: [ 42.955435] ffff8801be2df400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.962784] ffff8801be2df480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.970150] >ffff8801be2df500: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.977488] ^ [ 42.982931] ffff8801be2df580: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 42.990278] ffff8801be2df600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.997625] ================================================================== [ 43.004974] Disabling lock debugging due to kernel taint [ 43.010446] Kernel panic - not syncing: panic_on_warn set ... [ 43.016343] CPU: 1 PID: 6073 Comm: syz-executor097 Tainted: G B 4.19.0+ #95 [ 43.024745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.034082] Call Trace: [ 43.036717] dump_stack+0x244/0x39d [ 43.040337] ? dump_stack_print_info.cold.1+0x20/0x20 [ 43.045626] panic+0x2ad/0x55c [ 43.048820] ? add_taint.cold.5+0x16/0x16 [ 43.052958] ? trace_hardirqs_on+0xb4/0x310 [ 43.057270] kasan_end_report+0x47/0x4f [ 43.061462] kasan_report.cold.8+0x76/0x309 [ 43.065774] ? ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 43.070870] __asan_report_load1_noabort+0x14/0x20 [ 43.075789] ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 43.080706] ip6_tnl_start_xmit+0x49f/0x25a0 [ 43.085103] ? ip6_tnl_xmit+0x3730/0x3730 [ 43.089240] ? mark_held_locks+0x130/0x130 [ 43.093460] ? zap_class+0x640/0x640 [ 43.097162] ? __lock_acquire+0x62f/0x4c20 [ 43.101403] ? zap_class+0x640/0x640 [ 43.105102] ? zap_class+0x640/0x640 [ 43.108812] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.114370] ? check_preemption_disabled+0x48/0x280 [ 43.119386] ? __lock_is_held+0xb5/0x140 [ 43.123444] dev_hard_start_xmit+0x295/0xc90 [ 43.127842] ? dev_direct_xmit+0x6b0/0x6b0 [ 43.132064] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 43.137586] ? netif_skb_features+0x690/0xb70 [ 43.142064] ? rcu_softirq_qs+0x20/0x20 [ 43.146022] ? validate_xmit_xfrm+0x1ef/0xda0 [ 43.150507] ? validate_xmit_skb+0x80c/0xf30 [ 43.154903] ? netif_skb_features+0xb70/0xb70 [ 43.159390] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.164915] ? check_preemption_disabled+0x48/0x280 [ 43.169914] ? check_preemption_disabled+0x48/0x280 [ 43.174917] __dev_queue_xmit+0x2f71/0x3ad0 [ 43.179226] ? save_stack+0x43/0xd0 [ 43.182843] ? kasan_kmalloc+0xc7/0xe0 [ 43.186716] ? __kmalloc_node_track_caller+0x50/0x70 [ 43.191809] ? netdev_pick_tx+0x310/0x310 [ 43.195942] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.201467] ? check_preemption_disabled+0x48/0x280 [ 43.206472] ? __lock_is_held+0xb5/0x140 [ 43.210517] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 43.215534] ? skb_release_data+0x1c4/0x880 [ 43.219842] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 43.225103] ? kasan_unpoison_shadow+0x35/0x50 [ 43.229668] ? skb_tx_error+0x2f0/0x2f0 [ 43.233629] ? __kmalloc_node_track_caller+0x50/0x70 [ 43.238718] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.244245] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 43.249776] ? kasan_check_write+0x14/0x20 [ 43.254007] ? pskb_expand_head+0x6b3/0x10f0 [ 43.258420] ? find_held_lock+0x36/0x1c0 [ 43.262469] ? skb_release_data+0x880/0x880 [ 43.266773] ? __alloc_skb+0x770/0x770 [ 43.270647] ? __lock_is_held+0xb5/0x140 [ 43.274694] ? kasan_check_write+0x14/0x20 [ 43.278910] ? __skb_clone+0x6c7/0xa00 [ 43.282780] ? __copy_skb_header+0x6b0/0x6b0 [ 43.287171] ? kmem_cache_alloc+0x33a/0x730 [ 43.291488] ? depot_save_stack+0x292/0x470 [ 43.295797] ? skb_ensure_writable+0x15e/0x640 [ 43.300368] dev_queue_xmit+0x17/0x20 [ 43.304152] ? dev_queue_xmit+0x17/0x20 [ 43.308112] __bpf_redirect+0x5cf/0xb20 [ 43.312076] bpf_clone_redirect+0x2f6/0x490 [ 43.316382] bpf_prog_759a992c578a3894+0x81e/0x1000 [ 43.321383] ? bpf_test_run+0x175/0x780 [ 43.325352] ? lock_downgrade+0x900/0x900 [ 43.329486] ? ktime_get+0x332/0x400 [ 43.333194] ? find_held_lock+0x36/0x1c0 [ 43.337244] ? lock_acquire+0x1ed/0x520 [ 43.341215] ? bpf_test_run+0x3cb/0x780 [ 43.345173] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.350705] ? check_preemption_disabled+0x48/0x280 [ 43.355705] ? kasan_check_read+0x11/0x20 [ 43.359835] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 43.365091] ? rcu_softirq_qs+0x20/0x20 [ 43.369046] ? bpf_cgroup_storage_release+0x220/0x220 [ 43.374221] ? skb_try_coalesce+0x1b70/0x1b70 [ 43.378704] ? bpf_test_run+0x25d/0x780 [ 43.382665] ? netlink_diag_dump+0x2a0/0x2a0 [ 43.387058] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.392578] ? bpf_test_init.isra.10+0x70/0x100 [ 43.397234] ? bpf_prog_test_run_skb+0x73b/0xcb0 [ 43.401980] ? bpf_test_finish.isra.9+0x1f0/0x1f0 [ 43.406806] ? bpf_prog_add+0x69/0xd0 [ 43.410593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.416112] ? __bpf_prog_get+0x9b/0x290 [ 43.420158] ? bpf_test_finish.isra.9+0x1f0/0x1f0 [ 43.424987] ? bpf_prog_test_run+0x130/0x1a0 [ 43.429381] ? __x64_sys_bpf+0x3d8/0x520 [ 43.433424] ? bpf_prog_get+0x20/0x20 [ 43.437219] ? do_syscall_64+0x1b9/0x820 [ 43.441270] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.446632] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.451557] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.456400] ? trace_hardirqs_on_caller+0x310/0x310 [ 43.461400] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.466411] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.471937] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.476938] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.481775] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.488034] Kernel Offset: disabled [ 43.491653] Rebooting in 86400 seconds..