[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.031134] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.176393] random: sshd: uninitialized urandom read (32 bytes read) [ 28.478455] random: sshd: uninitialized urandom read (32 bytes read) [ 29.044124] random: sshd: uninitialized urandom read (32 bytes read) [ 39.792803] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.46' (ECDSA) to the list of known hosts. [ 45.366374] random: sshd: uninitialized urandom read (32 bytes read) [ 45.491767] IPVS: ftp: loaded support on port[0] = 21 [ 45.651878] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.658472] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.665798] device bridge_slave_0 entered promiscuous mode [ 45.682815] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.689551] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.696884] device bridge_slave_1 entered promiscuous mode [ 45.713223] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 45.731143] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 45.778379] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 45.798184] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 45.870710] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 45.878278] team0: Port device team_slave_0 added [ 45.894863] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 45.901977] team0: Port device team_slave_1 added [ 45.918425] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 45.940024] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 45.959863] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 45.979976] 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 [ 46.116484] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.122893] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.129804] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.136180] 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 [ 46.636073] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.686482] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 46.740084] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 46.746285] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 46.753290] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 46.802523] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 47.069401] ================================================================== [ 47.076838] BUG: KASAN: slab-out-of-bounds in ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 47.084633] Read of size 1 at addr ffff8801cf1d8e87 by task syz-executor402/5340 [ 47.092153] [ 47.093782] CPU: 0 PID: 5340 Comm: syz-executor402 Not tainted 4.19.0-rc3+ #216 [ 47.101207] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.110580] Call Trace: [ 47.113170] dump_stack+0x1c4/0x2b4 [ 47.116787] ? dump_stack_print_info.cold.2+0x52/0x52 [ 47.121976] ? printk+0xa7/0xcf [ 47.125250] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 47.130005] print_address_description.cold.8+0x9/0x1ff [ 47.135354] kasan_report.cold.9+0x242/0x309 [ 47.139751] ? ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 47.144841] __asan_report_load1_noabort+0x14/0x20 [ 47.149756] ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 47.154677] ip6_tnl_start_xmit+0x3e2/0x2370 [ 47.159072] ? ip6_tnl_xmit+0x3850/0x3850 [ 47.163231] ? mark_held_locks+0x130/0x130 [ 47.167451] ? graph_lock+0x170/0x170 [ 47.171234] ? __lock_acquire+0x7ec/0x4ec0 [ 47.175454] ? __lock_acquire+0x7ec/0x4ec0 [ 47.179685] ? graph_lock+0x170/0x170 [ 47.183463] ? graph_lock+0x170/0x170 [ 47.187271] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.192808] ? check_preemption_disabled+0x48/0x200 [ 47.197823] ? check_preemption_disabled+0x48/0x200 [ 47.202827] ? __lock_is_held+0xb5/0x140 [ 47.206887] dev_hard_start_xmit+0x295/0xc90 [ 47.211284] ? dev_direct_xmit+0x6b0/0x6b0 [ 47.215504] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.221027] ? netif_skb_features+0x690/0xb70 [ 47.225506] ? rcu_bh_qs+0xc0/0xc0 [ 47.229036] ? validate_xmit_xfrm+0x1ef/0xda0 [ 47.233528] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.239069] ? validate_xmit_skb+0x80c/0xf30 [ 47.243464] ? netif_skb_features+0xb70/0xb70 [ 47.247958] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.253484] ? check_preemption_disabled+0x48/0x200 [ 47.258500] ? check_preemption_disabled+0x48/0x200 [ 47.263505] __dev_queue_xmit+0x2f3b/0x3980 [ 47.267815] ? save_stack+0x43/0xd0 [ 47.271423] ? kasan_kmalloc+0xc7/0xe0 [ 47.275299] ? __kmalloc_node_track_caller+0x47/0x70 [ 47.280404] ? netdev_pick_tx+0x2d0/0x2d0 [ 47.284551] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.290085] ? check_preemption_disabled+0x48/0x200 [ 47.295093] ? check_preemption_disabled+0x48/0x200 [ 47.300103] ? __lock_is_held+0xb5/0x140 [ 47.304166] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 47.309167] ? skb_release_data+0x1c4/0x880 [ 47.313480] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 47.318745] ? kasan_unpoison_shadow+0x35/0x50 [ 47.323315] ? skb_tx_error+0x2f0/0x2f0 [ 47.327281] ? __kmalloc_node_track_caller+0x47/0x70 [ 47.332367] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.337887] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 47.343423] ? kasan_check_write+0x14/0x20 [ 47.347646] ? pskb_expand_head+0x6b3/0x10f0 [ 47.352051] ? __pskb_copy_fclone+0xeb0/0xeb0 [ 47.356536] ? skb_checksum+0x140/0x140 [ 47.360497] ? __lock_is_held+0xb5/0x140 [ 47.364559] ? kasan_check_write+0x14/0x20 [ 47.368783] ? __skb_clone+0x6c7/0xa00 [ 47.372653] ? __copy_skb_header+0x6b0/0x6b0 [ 47.377049] ? kmem_cache_alloc+0x33a/0x730 [ 47.381366] ? depot_save_stack+0x292/0x470 [ 47.385677] ? skb_ensure_writable+0x15e/0x640 [ 47.390248] dev_queue_xmit+0x17/0x20 [ 47.394039] ? dev_queue_xmit+0x17/0x20 [ 47.398000] __bpf_redirect+0x5cf/0xb20 [ 47.402028] bpf_clone_redirect+0x2f6/0x490 [ 47.406351] bpf_prog_759a992c578a3894+0xe4c/0x1000 [ 47.411353] ? netlink_remove+0xd90/0xf50 [ 47.415491] ? lock_downgrade+0x900/0x900 [ 47.419627] ? ktime_get+0x352/0x440 [ 47.423329] ? find_held_lock+0x36/0x1c0 [ 47.427379] ? lock_acquire+0x1ed/0x520 [ 47.431352] ? bpf_test_run+0x32e/0x5a0 [ 47.435313] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.440839] ? check_preemption_disabled+0x48/0x200 [ 47.445860] ? kasan_check_read+0x11/0x20 [ 47.449994] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.455260] ? rcu_bh_qs+0xc0/0xc0 [ 47.458785] ? __build_skb+0x359/0x430 [ 47.462659] ? skb_try_coalesce+0x1b70/0x1b70 [ 47.467156] ? bpf_test_run+0x1c0/0x5a0 [ 47.471120] ? netlink_diag_dump+0x2a0/0x2a0 [ 47.475515] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.481038] ? bpf_test_init.isra.9+0x70/0x100 [ 47.485613] ? bpf_prog_test_run_skb+0x634/0xb40 [ 47.490355] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 47.495284] ? bpf_prog_add+0x69/0xd0 [ 47.499073] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.504601] ? __bpf_prog_get+0x9b/0x290 [ 47.508648] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 47.513469] ? bpf_prog_test_run+0x130/0x1a0 [ 47.517864] ? __x64_sys_bpf+0x3d8/0x510 [ 47.521913] ? bpf_prog_get+0x20/0x20 [ 47.525708] ? do_syscall_64+0x1b9/0x820 [ 47.529765] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.535122] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.540035] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.544929] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.549939] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.554940] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.560462] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.565466] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.570300] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.575648] [ 47.577487] Allocated by task 5340: [ 47.581099] save_stack+0x43/0xd0 [ 47.584539] kasan_kmalloc+0xc7/0xe0 [ 47.588252] __kmalloc_node_track_caller+0x47/0x70 [ 47.593243] __kmalloc_reserve.isra.39+0x41/0xe0 [ 47.597993] pskb_expand_head+0x230/0x10f0 [ 47.602235] skb_ensure_writable+0x3dd/0x640 [ 47.606627] bpf_clone_redirect+0x14a/0x490 [ 47.610932] bpf_prog_759a992c578a3894+0xe4c/0x1000 [ 47.615945] [ 47.617564] Freed by task 3897: [ 47.620825] save_stack+0x43/0xd0 [ 47.624272] __kasan_slab_free+0x102/0x150 [ 47.628529] kasan_slab_free+0xe/0x10 [ 47.632321] kfree+0xcf/0x230 [ 47.635469] load_elf_binary+0x25a8/0x5620 [ 47.639694] search_binary_handler+0x17d/0x570 [ 47.644328] __do_execve_file.isra.33+0x162f/0x2540 [ 47.649347] __x64_sys_execve+0x8f/0xc0 [ 47.653304] do_syscall_64+0x1b9/0x820 [ 47.657174] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.662351] [ 47.663960] The buggy address belongs to the object at ffff8801cf1d8c80 [ 47.663960] which belongs to the cache kmalloc-512 of size 512 [ 47.676612] The buggy address is located 7 bytes to the right of [ 47.676612] 512-byte region [ffff8801cf1d8c80, ffff8801cf1d8e80) [ 47.688881] The buggy address belongs to the page: [ 47.693800] page:ffffea00073c7600 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 [ 47.701932] flags: 0x2fffc0000000100(slab) [ 47.706155] raw: 02fffc0000000100 ffffea00073c7308 ffffea00073a45c8 ffff8801da800940 [ 47.714027] raw: 0000000000000000 ffff8801cf1d8000 0000000100000006 0000000000000000 [ 47.721886] page dumped because: kasan: bad access detected [ 47.727575] [ 47.729202] Memory state around the buggy address: [ 47.734109] ffff8801cf1d8d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.741448] ffff8801cf1d8e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.748828] >ffff8801cf1d8e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.756176] ^ [ 47.759525] ffff8801cf1d8f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.766879] ffff8801cf1d8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.774231] ================================================================== [ 47.781566] Disabling lock debugging due to kernel taint [ 47.787045] Kernel panic - not syncing: panic_on_warn set ... [ 47.787045] [ 47.794415] CPU: 0 PID: 5340 Comm: syz-executor402 Tainted: G B 4.19.0-rc3+ #216 [ 47.803239] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.812568] Call Trace: [ 47.815137] dump_stack+0x1c4/0x2b4 [ 47.818746] ? dump_stack_print_info.cold.2+0x52/0x52 [ 47.823918] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.828745] panic+0x238/0x4e7 [ 47.831925] ? add_taint.cold.5+0x16/0x16 [ 47.836059] ? trace_hardirqs_on+0xb4/0x310 [ 47.840415] kasan_end_report+0x47/0x4f [ 47.844382] kasan_report.cold.9+0x76/0x309 [ 47.848690] ? ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 47.853779] __asan_report_load1_noabort+0x14/0x20 [ 47.858692] ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 47.863627] ip6_tnl_start_xmit+0x3e2/0x2370 [ 47.868131] ? ip6_tnl_xmit+0x3850/0x3850 [ 47.872384] ? mark_held_locks+0x130/0x130 [ 47.876622] ? graph_lock+0x170/0x170 [ 47.880403] ? __lock_acquire+0x7ec/0x4ec0 [ 47.884626] ? __lock_acquire+0x7ec/0x4ec0 [ 47.888957] ? graph_lock+0x170/0x170 [ 47.892746] ? graph_lock+0x170/0x170 [ 47.896533] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.902071] ? check_preemption_disabled+0x48/0x200 [ 47.907077] ? check_preemption_disabled+0x48/0x200 [ 47.912080] ? __lock_is_held+0xb5/0x140 [ 47.916143] dev_hard_start_xmit+0x295/0xc90 [ 47.920537] ? dev_direct_xmit+0x6b0/0x6b0 [ 47.924762] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.930284] ? netif_skb_features+0x690/0xb70 [ 47.934780] ? rcu_bh_qs+0xc0/0xc0 [ 47.938306] ? validate_xmit_xfrm+0x1ef/0xda0 [ 47.943103] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.948649] ? validate_xmit_skb+0x80c/0xf30 [ 47.953047] ? netif_skb_features+0xb70/0xb70 [ 47.957532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.963052] ? check_preemption_disabled+0x48/0x200 [ 47.968057] ? check_preemption_disabled+0x48/0x200 [ 47.973078] __dev_queue_xmit+0x2f3b/0x3980 [ 47.977411] ? save_stack+0x43/0xd0 [ 47.981022] ? kasan_kmalloc+0xc7/0xe0 [ 47.984909] ? __kmalloc_node_track_caller+0x47/0x70 [ 47.990001] ? netdev_pick_tx+0x2d0/0x2d0 [ 47.994132] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.999655] ? check_preemption_disabled+0x48/0x200 [ 48.004657] ? check_preemption_disabled+0x48/0x200 [ 48.009707] ? __lock_is_held+0xb5/0x140 [ 48.013754] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 48.018756] ? skb_release_data+0x1c4/0x880 [ 48.023061] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 48.028336] ? kasan_unpoison_shadow+0x35/0x50 [ 48.032927] ? skb_tx_error+0x2f0/0x2f0 [ 48.036886] ? __kmalloc_node_track_caller+0x47/0x70 [ 48.041985] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.047518] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 48.053035] ? kasan_check_write+0x14/0x20 [ 48.057254] ? pskb_expand_head+0x6b3/0x10f0 [ 48.061646] ? __pskb_copy_fclone+0xeb0/0xeb0 [ 48.066124] ? skb_checksum+0x140/0x140 [ 48.070085] ? __lock_is_held+0xb5/0x140 [ 48.074128] ? kasan_check_write+0x14/0x20 [ 48.078374] ? __skb_clone+0x6c7/0xa00 [ 48.082249] ? __copy_skb_header+0x6b0/0x6b0 [ 48.086644] ? kmem_cache_alloc+0x33a/0x730 [ 48.090950] ? depot_save_stack+0x292/0x470 [ 48.095273] ? skb_ensure_writable+0x15e/0x640 [ 48.099852] dev_queue_xmit+0x17/0x20 [ 48.103656] ? dev_queue_xmit+0x17/0x20 [ 48.107660] __bpf_redirect+0x5cf/0xb20 [ 48.111622] bpf_clone_redirect+0x2f6/0x490 [ 48.115928] bpf_prog_759a992c578a3894+0xe4c/0x1000 [ 48.120928] ? netlink_remove+0xd90/0xf50 [ 48.125071] ? lock_downgrade+0x900/0x900 [ 48.129202] ? ktime_get+0x352/0x440 [ 48.132901] ? find_held_lock+0x36/0x1c0 [ 48.136947] ? lock_acquire+0x1ed/0x520 [ 48.140902] ? bpf_test_run+0x32e/0x5a0 [ 48.144865] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.150386] ? check_preemption_disabled+0x48/0x200 [ 48.155387] ? kasan_check_read+0x11/0x20 [ 48.159519] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.164781] ? rcu_bh_qs+0xc0/0xc0 [ 48.168306] ? __build_skb+0x359/0x430 [ 48.172190] ? skb_try_coalesce+0x1b70/0x1b70 [ 48.176668] ? bpf_test_run+0x1c0/0x5a0 [ 48.180627] ? netlink_diag_dump+0x2a0/0x2a0 [ 48.185021] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.190538] ? bpf_test_init.isra.9+0x70/0x100 [ 48.195104] ? bpf_prog_test_run_skb+0x634/0xb40 [ 48.199885] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 48.204725] ? bpf_prog_add+0x69/0xd0 [ 48.208508] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.214024] ? __bpf_prog_get+0x9b/0x290 [ 48.218071] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 48.222894] ? bpf_prog_test_run+0x130/0x1a0 [ 48.227301] ? __x64_sys_bpf+0x3d8/0x510 [ 48.231343] ? bpf_prog_get+0x20/0x20 [ 48.235135] ? do_syscall_64+0x1b9/0x820 [ 48.239179] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.244536] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.249457] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.254282] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.259281] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.264292] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.269813] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.274814] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.279641] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.285804] Kernel Offset: disabled [ 48.289447] Rebooting in 86400 seconds..