[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 27.755179] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.208269] random: sshd: uninitialized urandom read (32 bytes read) [ 29.625006] random: sshd: uninitialized urandom read (32 bytes read) [ 30.220597] random: sshd: uninitialized urandom read (32 bytes read) [ 30.445424] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 36.140090] random: sshd: uninitialized urandom read (32 bytes read) [ 36.271283] IPVS: ftp: loaded support on port[0] = 21 [ 36.443064] bridge0: port 1(bridge_slave_0) entered blocking state [ 36.449755] bridge0: port 1(bridge_slave_0) entered disabled state [ 36.457392] device bridge_slave_0 entered promiscuous mode [ 36.476397] bridge0: port 2(bridge_slave_1) entered blocking state [ 36.482849] bridge0: port 2(bridge_slave_1) entered disabled state [ 36.489810] device bridge_slave_1 entered promiscuous mode [ 36.507819] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 36.525898] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 36.578514] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 36.598730] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 36.675706] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 36.683361] team0: Port device team_slave_0 added [ 36.700108] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 36.707486] team0: Port device team_slave_1 added [ 36.725239] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 36.746194] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 36.765680] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 36.786566] 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 [ 36.934758] bridge0: port 2(bridge_slave_1) entered blocking state [ 36.941194] bridge0: port 2(bridge_slave_1) entered forwarding state [ 36.948280] bridge0: port 1(bridge_slave_0) entered blocking state [ 36.954669] 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 [ 37.493564] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.546874] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 37.598887] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 37.605355] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 37.612836] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 37.663750] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 37.955206] ================================================================== [ 37.962660] BUG: KASAN: slab-out-of-bounds in ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 37.970459] Read of size 1 at addr ffff8801cb7dc4c7 by task syz-executor119/5403 [ 37.977979] [ 37.979598] CPU: 1 PID: 5403 Comm: syz-executor119 Not tainted 4.19.0-rc3+ #15 [ 37.986962] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.996310] Call Trace: [ 37.998894] dump_stack+0x1c4/0x2b4 [ 38.002527] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.007725] ? printk+0xa7/0xcf [ 38.011000] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 38.015754] print_address_description.cold.8+0x9/0x1ff [ 38.021138] kasan_report.cold.9+0x242/0x309 [ 38.025554] ? ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 38.030677] __asan_report_load1_noabort+0x14/0x20 [ 38.035606] ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 38.040545] ip6_tnl_start_xmit+0x3e2/0x2370 [ 38.044954] ? ip6_tnl_xmit+0x3850/0x3850 [ 38.049100] ? mark_held_locks+0x130/0x130 [ 38.053327] ? graph_lock+0x170/0x170 [ 38.057123] ? __lock_acquire+0x7ec/0x4ec0 [ 38.061346] ? __lock_acquire+0x7ec/0x4ec0 [ 38.065582] ? graph_lock+0x170/0x170 [ 38.069370] ? graph_lock+0x170/0x170 [ 38.073166] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.078711] ? check_preemption_disabled+0x48/0x200 [ 38.083731] ? check_preemption_disabled+0x48/0x200 [ 38.088746] ? __lock_is_held+0xb5/0x140 [ 38.092808] dev_hard_start_xmit+0x27f/0xc70 [ 38.097219] ? dev_direct_xmit+0x6b0/0x6b0 [ 38.101447] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.106991] ? netif_skb_features+0x690/0xb70 [ 38.111481] ? rcu_bh_qs+0xc0/0xc0 [ 38.115020] ? validate_xmit_xfrm+0x1ef/0xda0 [ 38.119506] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.125058] ? validate_xmit_skb+0x80c/0xf30 [ 38.129469] ? netif_skb_features+0xb70/0xb70 [ 38.133959] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.139490] ? check_preemption_disabled+0x48/0x200 [ 38.144496] ? check_preemption_disabled+0x48/0x200 [ 38.149510] __dev_queue_xmit+0x2f3b/0x3980 [ 38.153820] ? save_stack+0x43/0xd0 [ 38.157436] ? kasan_kmalloc+0xc7/0xe0 [ 38.161311] ? __kmalloc_node_track_caller+0x47/0x70 [ 38.166414] ? netdev_pick_tx+0x2d0/0x2d0 [ 38.170556] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.176093] ? check_preemption_disabled+0x48/0x200 [ 38.181106] ? check_preemption_disabled+0x48/0x200 [ 38.186151] ? __lock_is_held+0xb5/0x140 [ 38.190211] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 38.195227] ? skb_release_data+0x1c4/0x880 [ 38.199544] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 38.204820] ? kasan_unpoison_shadow+0x35/0x50 [ 38.209391] ? skb_tx_error+0x2f0/0x2f0 [ 38.213364] ? __kmalloc_node_track_caller+0x47/0x70 [ 38.218456] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.223988] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 38.229551] ? kasan_check_write+0x14/0x20 [ 38.233799] ? pskb_expand_head+0x6b3/0x10f0 [ 38.238221] ? __pskb_copy_fclone+0xeb0/0xeb0 [ 38.242726] ? skb_checksum+0x140/0x140 [ 38.246695] ? __lock_is_held+0xb5/0x140 [ 38.250754] ? kasan_check_write+0x14/0x20 [ 38.255430] ? __skb_clone+0x6c7/0xa00 [ 38.259315] ? __copy_skb_header+0x6b0/0x6b0 [ 38.263714] ? kmem_cache_alloc+0x33a/0x730 [ 38.268026] ? depot_save_stack+0x292/0x470 [ 38.272365] ? skb_ensure_writable+0x15e/0x640 [ 38.276958] dev_queue_xmit+0x17/0x20 [ 38.280763] ? dev_queue_xmit+0x17/0x20 [ 38.284731] __bpf_redirect+0x5cf/0xb20 [ 38.288698] bpf_clone_redirect+0x2f6/0x490 [ 38.293018] bpf_prog_759a992c578a3894+0x65c/0x1000 [ 38.298023] ? ctrl_build_family_msg+0x40/0xa0 [ 38.302612] ? lock_downgrade+0x900/0x900 [ 38.306754] ? ktime_get+0x352/0x440 [ 38.310460] ? find_held_lock+0x36/0x1c0 [ 38.314515] ? lock_acquire+0x1ed/0x520 [ 38.318476] ? bpf_test_run+0x32e/0x5a0 [ 38.322449] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.327978] ? check_preemption_disabled+0x48/0x200 [ 38.332985] ? kasan_check_read+0x11/0x20 [ 38.337125] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 38.342400] ? rcu_bh_qs+0xc0/0xc0 [ 38.345941] ? __build_skb+0x359/0x430 [ 38.349817] ? skb_try_coalesce+0x1b70/0x1b70 [ 38.354307] ? bpf_test_run+0x1c0/0x5a0 [ 38.358274] ? netlink_diag_dump+0x2a0/0x2a0 [ 38.362677] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.368202] ? bpf_test_init.isra.9+0x70/0x100 [ 38.372776] ? bpf_prog_test_run_skb+0x634/0xb40 [ 38.377526] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 38.382367] ? bpf_prog_add+0x69/0xd0 [ 38.386171] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.391702] ? __bpf_prog_get+0x9b/0x290 [ 38.395757] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 38.400610] ? bpf_prog_test_run+0x130/0x1a0 [ 38.405033] ? __x64_sys_bpf+0x3d8/0x510 [ 38.409080] ? bpf_prog_get+0x20/0x20 [ 38.412901] ? do_syscall_64+0x1b9/0x820 [ 38.416954] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.422326] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.427276] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.432117] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.437127] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.442136] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.447662] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.452704] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.457539] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.462895] [ 38.464503] Allocated by task 5403: [ 38.468118] save_stack+0x43/0xd0 [ 38.471556] kasan_kmalloc+0xc7/0xe0 [ 38.475265] __kmalloc_node_track_caller+0x47/0x70 [ 38.480179] __kmalloc_reserve.isra.39+0x41/0xe0 [ 38.484925] pskb_expand_head+0x230/0x10f0 [ 38.489143] skb_ensure_writable+0x3dd/0x640 [ 38.493536] bpf_clone_redirect+0x14a/0x490 [ 38.497842] bpf_prog_759a992c578a3894+0x65c/0x1000 [ 38.502837] [ 38.504448] Freed by task 3970: [ 38.507712] save_stack+0x43/0xd0 [ 38.511148] __kasan_slab_free+0x102/0x150 [ 38.515376] kasan_slab_free+0xe/0x10 [ 38.519159] kfree+0xcf/0x230 [ 38.522257] load_elf_binary+0x25b4/0x5620 [ 38.526479] search_binary_handler+0x17d/0x570 [ 38.531049] __do_execve_file.isra.33+0x162f/0x2540 [ 38.536048] __x64_sys_execve+0x8f/0xc0 [ 38.540027] do_syscall_64+0x1b9/0x820 [ 38.543901] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.549085] [ 38.550712] The buggy address belongs to the object at ffff8801cb7dc2c0 [ 38.550712] which belongs to the cache kmalloc-512 of size 512 [ 38.563361] The buggy address is located 7 bytes to the right of [ 38.563361] 512-byte region [ffff8801cb7dc2c0, ffff8801cb7dc4c0) [ 38.575592] The buggy address belongs to the page: [ 38.580513] page:ffffea00072df700 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 [ 38.588661] flags: 0x2fffc0000000100(slab) [ 38.592894] raw: 02fffc0000000100 ffffea00072df5c8 ffffea00072b6c88 ffff8801da800940 [ 38.600780] raw: 0000000000000000 ffff8801cb7dc040 0000000100000006 0000000000000000 [ 38.608645] page dumped because: kasan: bad access detected [ 38.614336] [ 38.615945] Memory state around the buggy address: [ 38.620861] ffff8801cb7dc380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.628222] ffff8801cb7dc400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.635580] >ffff8801cb7dc480: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.642923] ^ [ 38.648358] ffff8801cb7dc500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 38.655729] ffff8801cb7dc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.663069] ================================================================== [ 38.670412] Disabling lock debugging due to kernel taint [ 38.675890] Kernel panic - not syncing: panic_on_warn set ... [ 38.675890] [ 38.683270] CPU: 1 PID: 5403 Comm: syz-executor119 Tainted: G B 4.19.0-rc3+ #15 [ 38.692025] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.701402] Call Trace: [ 38.703982] dump_stack+0x1c4/0x2b4 [ 38.707603] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.712799] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 38.717561] panic+0x238/0x4e7 [ 38.720763] ? add_taint.cold.5+0x16/0x16 [ 38.724902] ? trace_hardirqs_on+0xb4/0x310 [ 38.729211] kasan_end_report+0x47/0x4f [ 38.733174] kasan_report.cold.9+0x76/0x309 [ 38.737499] ? ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 38.742597] __asan_report_load1_noabort+0x14/0x20 [ 38.747517] ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 [ 38.752438] ip6_tnl_start_xmit+0x3e2/0x2370 [ 38.756834] ? ip6_tnl_xmit+0x3850/0x3850 [ 38.760974] ? mark_held_locks+0x130/0x130 [ 38.765196] ? graph_lock+0x170/0x170 [ 38.768987] ? __lock_acquire+0x7ec/0x4ec0 [ 38.773208] ? __lock_acquire+0x7ec/0x4ec0 [ 38.777428] ? graph_lock+0x170/0x170 [ 38.781213] ? graph_lock+0x170/0x170 [ 38.785001] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.790543] ? check_preemption_disabled+0x48/0x200 [ 38.795549] ? check_preemption_disabled+0x48/0x200 [ 38.800563] ? __lock_is_held+0xb5/0x140 [ 38.804627] dev_hard_start_xmit+0x27f/0xc70 [ 38.809029] ? dev_direct_xmit+0x6b0/0x6b0 [ 38.813251] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.818773] ? netif_skb_features+0x690/0xb70 [ 38.823254] ? rcu_bh_qs+0xc0/0xc0 [ 38.826782] ? validate_xmit_xfrm+0x1ef/0xda0 [ 38.831262] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.836789] ? validate_xmit_skb+0x80c/0xf30 [ 38.841187] ? netif_skb_features+0xb70/0xb70 [ 38.845672] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.851195] ? check_preemption_disabled+0x48/0x200 [ 38.856194] ? check_preemption_disabled+0x48/0x200 [ 38.861201] __dev_queue_xmit+0x2f3b/0x3980 [ 38.865524] ? save_stack+0x43/0xd0 [ 38.869133] ? kasan_kmalloc+0xc7/0xe0 [ 38.873004] ? __kmalloc_node_track_caller+0x47/0x70 [ 38.878097] ? netdev_pick_tx+0x2d0/0x2d0 [ 38.882236] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.887776] ? check_preemption_disabled+0x48/0x200 [ 38.892794] ? check_preemption_disabled+0x48/0x200 [ 38.897815] ? __lock_is_held+0xb5/0x140 [ 38.901867] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 38.906871] ? skb_release_data+0x1c4/0x880 [ 38.911184] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 38.916461] ? kasan_unpoison_shadow+0x35/0x50 [ 38.921031] ? skb_tx_error+0x2f0/0x2f0 [ 38.924994] ? __kmalloc_node_track_caller+0x47/0x70 [ 38.930086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.935610] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 38.941148] ? kasan_check_write+0x14/0x20 [ 38.945370] ? pskb_expand_head+0x6b3/0x10f0 [ 38.949770] ? __pskb_copy_fclone+0xeb0/0xeb0 [ 38.954254] ? skb_checksum+0x140/0x140 [ 38.958216] ? __lock_is_held+0xb5/0x140 [ 38.962267] ? kasan_check_write+0x14/0x20 [ 38.966492] ? __skb_clone+0x6c7/0xa00 [ 38.970367] ? __copy_skb_header+0x6b0/0x6b0 [ 38.974760] ? kmem_cache_alloc+0x33a/0x730 [ 38.979072] ? depot_save_stack+0x292/0x470 [ 38.983385] ? skb_ensure_writable+0x15e/0x640 [ 38.987956] dev_queue_xmit+0x17/0x20 [ 38.991741] ? dev_queue_xmit+0x17/0x20 [ 38.995703] __bpf_redirect+0x5cf/0xb20 [ 38.999666] bpf_clone_redirect+0x2f6/0x490 [ 39.003975] bpf_prog_759a992c578a3894+0x65c/0x1000 [ 39.008977] ? ctrl_build_family_msg+0x40/0xa0 [ 39.013548] ? lock_downgrade+0x900/0x900 [ 39.017688] ? ktime_get+0x352/0x440 [ 39.021393] ? find_held_lock+0x36/0x1c0 [ 39.025445] ? lock_acquire+0x1ed/0x520 [ 39.029423] ? bpf_test_run+0x32e/0x5a0 [ 39.033388] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.038913] ? check_preemption_disabled+0x48/0x200 [ 39.043919] ? kasan_check_read+0x11/0x20 [ 39.048068] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 39.053332] ? rcu_bh_qs+0xc0/0xc0 [ 39.056872] ? __build_skb+0x359/0x430 [ 39.060748] ? skb_try_coalesce+0x1b70/0x1b70 [ 39.065231] ? bpf_test_run+0x1c0/0x5a0 [ 39.069207] ? netlink_diag_dump+0x2a0/0x2a0 [ 39.073603] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.079131] ? bpf_test_init.isra.9+0x70/0x100 [ 39.083716] ? bpf_prog_test_run_skb+0x634/0xb40 [ 39.088482] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 39.093309] ? bpf_prog_add+0x69/0xd0 [ 39.097094] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.102622] ? __bpf_prog_get+0x9b/0x290 [ 39.106689] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 39.111519] ? bpf_prog_test_run+0x130/0x1a0 [ 39.115935] ? __x64_sys_bpf+0x3d8/0x510 [ 39.119981] ? bpf_prog_get+0x20/0x20 [ 39.123774] ? do_syscall_64+0x1b9/0x820 [ 39.127822] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.133188] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.138100] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.142938] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.147942] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.152945] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.158466] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.163472] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.168301] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.174518] Kernel Offset: disabled [ 39.178142] Rebooting in 86400 seconds..