[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.498216] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.204343] random: sshd: uninitialized urandom read (32 bytes read) [ 22.539120] random: sshd: uninitialized urandom read (32 bytes read) [ 23.027081] random: sshd: uninitialized urandom read (32 bytes read) [ 31.032945] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. [ 36.538516] random: sshd: uninitialized urandom read (32 bytes read) 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 Error: argument "bridge0" is wrong: Device does not exist Error: argument "bridge0" is wrong: Device does not exist Cannot find device "veth0_to_bridge" Cannot find device "veth1_to_bridge" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Error: argument "bond0" is wrong: Device does not exist Error: argument "bond0" is wrong: Device does not exist Cannot find device "veth0_to_bond" Cannot find device "veth1_to_bond" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Error: argument "team0" is wrong: Device does not exist Error: argument "team0" is wrong: Device does not exist Cannot find device "veth0_to_team" Cannot find device "veth1_to_team" Cannot find device "bridge_slave_0" Cannot find device "bridge_slave_1" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "team0" Cannot find device "team0" Cannot find device "team0" Cannot find device "team0" Cannot find device "veth0_to_bridge" Cannot find device "veth0_to_bridge" Cannot find device "veth0_to_bridge" Cannot find device "veth0_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth0_to_bond" Cannot find device "veth0_to_bond" Cannot find device "veth0_to_bond" Cannot find device "veth0_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth0_to_team" Cannot find device "veth0_to_team" Cannot find device "veth0_to_team" Cannot find device "veth0_to_team" Cannot find device "veth1_to_team" Cannot find device "veth1_to_team" Cannot find device "veth1_to_team" Cannot find device "veth1_to_team" [ 38.176126] ================================================================== [ 38.183540] BUG: KASAN: slab-out-of-bounds in _decode_session6+0x124c/0x1370 [ 38.190713] Read of size 1 at addr ffff8801c25f7d87 by task syz-executor314/1914 [ 38.198227] [ 38.199835] CPU: 0 PID: 1914 Comm: syz-executor314 Not tainted 4.14.67+ #1 [ 38.206973] Call Trace: [ 38.209545] dump_stack+0xb9/0x11b [ 38.213068] print_address_description+0x60/0x22b [ 38.217892] kasan_report.cold.6+0x11b/0x2dd [ 38.222281] ? _decode_session6+0x124c/0x1370 [ 38.226764] _decode_session6+0x124c/0x1370 [ 38.231071] __xfrm_decode_session+0x64/0x100 [ 38.235549] vti6_tnl_xmit+0x31b/0x1550 [ 38.239504] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 38.243982] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 38.248461] ? skb_network_protocol+0xd8/0x410 [ 38.253118] ? __kmalloc_reserve.isra.8+0x2f/0xc0 [ 38.257938] ? pskb_expand_head+0x117/0xb30 [ 38.262236] ? skb_ensure_writable+0x237/0x2e0 [ 38.266796] ? bpf_clone_redirect+0x119/0x2b0 [ 38.271269] ? vti6_update+0x620/0x620 [ 38.275146] dev_hard_start_xmit+0x191/0x890 [ 38.279544] ? check_preemption_disabled+0x34/0x160 [ 38.284642] __dev_queue_xmit+0x13d9/0x1f40 [ 38.288950] ? netdev_pick_tx+0x2a0/0x2a0 [ 38.293082] ? rcu_read_lock_sched_held+0x102/0x120 [ 38.298203] ? __kmalloc_track_caller+0x29d/0x300 [ 38.303026] ? skb_release_data+0xed/0x610 [ 38.307240] ? skb_headers_offset_update+0x110/0x240 [ 38.312325] ? pskb_expand_head+0x734/0xb30 [ 38.316628] __bpf_redirect+0x5b0/0x990 [ 38.320584] bpf_clone_redirect+0x1d4/0x2b0 [ 38.324887] ___bpf_prog_run+0x248e/0x5c70 [ 38.329106] ? __free_insn_slot+0x490/0x490 [ 38.333517] ? bpf_jit_compile+0x30/0x30 [ 38.337566] ? depot_save_stack+0x20a/0x428 [ 38.341870] ? __bpf_prog_run512+0x99/0xe0 [ 38.346081] ? ___bpf_prog_run+0x5c70/0x5c70 [ 38.350472] ? __lock_acquire+0x619/0x4320 [ 38.354686] ? trace_hardirqs_on+0x10/0x10 [ 38.359018] ? trace_hardirqs_on+0x10/0x10 [ 38.363236] ? __lock_acquire+0x619/0x4320 [ 38.367450] ? lock_downgrade+0x560/0x560 [ 38.371575] ? __lru_cache_add+0x174/0x250 [ 38.375789] ? bpf_test_run+0x57/0x350 [ 38.379771] ? lock_acquire+0x10f/0x380 [ 38.383734] ? check_preemption_disabled+0x34/0x160 [ 38.388730] ? bpf_test_run+0xab/0x350 [ 38.392598] ? bpf_prog_test_run_skb+0x6b0/0x8c0 [ 38.397351] ? bpf_test_init.isra.1+0xc0/0xc0 [ 38.401824] ? __fget_light+0x163/0x1f0 [ 38.405773] ? bpf_prog_add+0x42/0xa0 [ 38.409551] ? bpf_test_init.isra.1+0xc0/0xc0 [ 38.414022] ? SyS_bpf+0x79d/0x3640 [ 38.417630] ? bpf_prog_get+0x20/0x20 [ 38.421410] ? __do_page_fault+0x485/0xb60 [ 38.425626] ? lock_downgrade+0x560/0x560 [ 38.429839] ? up_read+0x17/0x30 [ 38.433192] ? __do_page_fault+0x64c/0xb60 [ 38.437406] ? do_syscall_64+0x43/0x4b0 [ 38.441359] ? bpf_prog_get+0x20/0x20 [ 38.445134] ? do_syscall_64+0x19b/0x4b0 [ 38.449173] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 38.454518] [ 38.456123] Allocated by task 1914: [ 38.459730] kasan_kmalloc.part.1+0x4f/0xd0 [ 38.464030] __kmalloc_track_caller+0x104/0x300 [ 38.468779] __kmalloc_reserve.isra.8+0x2f/0xc0 [ 38.473439] pskb_expand_head+0x117/0xb30 [ 38.477568] skb_ensure_writable+0x237/0x2e0 [ 38.481954] bpf_clone_redirect+0x119/0x2b0 [ 38.486257] ___bpf_prog_run+0x248e/0x5c70 [ 38.490467] [ 38.492072] Freed by task 616: [ 38.495449] kasan_slab_free+0xac/0x190 [ 38.499421] kfree+0xf5/0x310 [ 38.502509] load_elf_binary+0x1c56/0x4530 [ 38.507612] search_binary_handler+0x13f/0x6c0 [ 38.512175] do_execveat_common.isra.14+0x1109/0x1d60 [ 38.517343] SyS_execve+0x34/0x40 [ 38.520770] do_syscall_64+0x19b/0x4b0 [ 38.524633] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 38.529798] [ 38.531407] The buggy address belongs to the object at ffff8801c25f7b80 [ 38.531407] which belongs to the cache kmalloc-512 of size 512 [ 38.544209] The buggy address is located 7 bytes to the right of [ 38.544209] 512-byte region [ffff8801c25f7b80, ffff8801c25f7d80) [ 38.556414] The buggy address belongs to the page: [ 38.561466] page:ffffea0007097d80 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 38.571415] flags: 0x4000000000008100(slab|head) [ 38.576147] raw: 4000000000008100 0000000000000000 0000000000000000 00000001800c000c [ 38.584006] raw: ffffea0007095000 0000000900000009 ffff8801da802c00 0000000000000000 [ 38.591863] page dumped because: kasan: bad access detected [ 38.597548] [ 38.599152] Memory state around the buggy address: [ 38.604059] ffff8801c25f7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.611399] ffff8801c25f7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.618738] >ffff8801c25f7d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc executing program [ 38.626074] ^ [ 38.629416] ffff8801c25f7e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.636749] ffff8801c25f7e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.644085] ================================================================== [ 38.651431] Disabling lock debugging due to kernel taint [ 38.656896] Kernel panic - not syncing: panic_on_warn set ... [ 38.656896] [ 38.664255] CPU: 0 PID: 1914 Comm: syz-executor314 Tainted: G B 4.14.67+ #1 [ 38.672481] Call Trace: [ 38.675051] dump_stack+0xb9/0x11b [ 38.678573] panic+0x1bf/0x3a4 [ 38.681745] ? add_taint.cold.4+0x16/0x16 [ 38.685872] kasan_end_report+0x43/0x49 [ 38.689827] kasan_report.cold.6+0x77/0x2dd [ 38.694237] ? _decode_session6+0x124c/0x1370 [ 38.698717] _decode_session6+0x124c/0x1370 [ 38.703139] __xfrm_decode_session+0x64/0x100 [ 38.707746] vti6_tnl_xmit+0x31b/0x1550 [ 38.711795] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 38.716267] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 38.720856] ? skb_network_protocol+0xd8/0x410 [ 38.725546] ? __kmalloc_reserve.isra.8+0x2f/0xc0 [ 38.730382] ? pskb_expand_head+0x117/0xb30 [ 38.734677] ? skb_ensure_writable+0x237/0x2e0 [ 38.739331] ? bpf_clone_redirect+0x119/0x2b0 [ 38.743812] ? vti6_update+0x620/0x620 [ 38.747677] dev_hard_start_xmit+0x191/0x890 [ 38.752067] ? check_preemption_disabled+0x34/0x160 [ 38.757059] __dev_queue_xmit+0x13d9/0x1f40 [ 38.761360] ? netdev_pick_tx+0x2a0/0x2a0 [ 38.765486] ? rcu_read_lock_sched_held+0x102/0x120 [ 38.770479] ? __kmalloc_track_caller+0x29d/0x300 [ 38.775300] ? skb_release_data+0xed/0x610 [ 38.779515] ? skb_headers_offset_update+0x110/0x240 [ 38.784595] ? pskb_expand_head+0x734/0xb30 [ 38.788998] __bpf_redirect+0x5b0/0x990 [ 38.792961] bpf_clone_redirect+0x1d4/0x2b0 [ 38.797259] ___bpf_prog_run+0x248e/0x5c70 [ 38.801471] ? __free_insn_slot+0x490/0x490 [ 38.805766] ? bpf_jit_compile+0x30/0x30 [ 38.809803] ? depot_save_stack+0x20a/0x428 [ 38.814099] ? __bpf_prog_run512+0x99/0xe0 [ 38.818319] ? ___bpf_prog_run+0x5c70/0x5c70 [ 38.822705] ? __lock_acquire+0x619/0x4320 [ 38.826917] ? trace_hardirqs_on+0x10/0x10 [ 38.831126] ? trace_hardirqs_on+0x10/0x10 [ 38.835337] ? __lock_acquire+0x619/0x4320 [ 38.839546] ? lock_downgrade+0x560/0x560 [ 38.843670] ? __lru_cache_add+0x174/0x250 [ 38.847882] ? bpf_test_run+0x57/0x350 [ 38.851745] ? lock_acquire+0x10f/0x380 [ 38.855695] ? check_preemption_disabled+0x34/0x160 [ 38.860686] ? bpf_test_run+0xab/0x350 [ 38.864552] ? bpf_prog_test_run_skb+0x6b0/0x8c0 [ 38.869281] ? bpf_test_init.isra.1+0xc0/0xc0 [ 38.873756] ? __fget_light+0x163/0x1f0 [ 38.877704] ? bpf_prog_add+0x42/0xa0 [ 38.881612] ? bpf_test_init.isra.1+0xc0/0xc0 [ 38.886082] ? SyS_bpf+0x79d/0x3640 [ 38.889685] ? bpf_prog_get+0x20/0x20 [ 38.893460] ? __do_page_fault+0x485/0xb60 [ 38.897672] ? lock_downgrade+0x560/0x560 [ 38.901795] ? up_read+0x17/0x30 [ 38.905134] ? __do_page_fault+0x64c/0xb60 [ 38.909352] ? do_syscall_64+0x43/0x4b0 [ 38.913305] ? bpf_prog_get+0x20/0x20 [ 38.917081] ? do_syscall_64+0x19b/0x4b0 [ 38.921134] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 38.926895] Dumping ftrace buffer: [ 38.930412] (ftrace buffer empty) [ 38.934097] Kernel Offset: 0x9c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 38.944903] Rebooting in 86400 seconds..