[ 40.163693] audit: type=1800 audit(1546142262.951:25): pid=7901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.184290] audit: type=1800 audit(1546142262.951:26): pid=7901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.207240] audit: type=1800 audit(1546142262.951:27): pid=7901 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. [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.225' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.925625] ------------[ cut here ]------------ [ 52.930415] kernel BUG at net/core/skbuff.c:1459! [ 52.935323] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 52.940692] CPU: 1 PID: 8078 Comm: syz-executor004 Not tainted 4.20.0+ #396 [ 52.947771] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.957119] RIP: 0010:pskb_expand_head+0xc24/0x10d0 [ 52.962133] Code: 8b 85 20 fe ff ff 48 85 c0 0f 84 44 fe ff ff e8 72 11 67 fb 4d 8d 74 24 ff e9 35 fe ff ff e8 63 11 67 fb 0f 0b e8 5c 11 67 fb <0f> 0b e8 55 11 67 fb 31 f6 31 ff e8 1c 12 67 fb e9 6a fd ff ff 4c [ 52.981020] RSP: 0018:ffff8880a4127190 EFLAGS: 00010293 [ 52.986391] RAX: ffff8880a5dd8240 RBX: ffff88809f5b2800 RCX: ffffffff861ad06a [ 52.993640] RDX: 0000000000000000 RSI: ffffffff861adae4 RDI: 0000000000000005 [ 53.000890] RBP: ffff8880a4127390 R08: ffff8880a5dd8240 R09: ffffed1013eb651a [ 53.008140] R10: ffffed1013eb651a R11: ffff88809f5b28d7 R12: ffff88809f5b28bc [ 53.015392] R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000000 [ 53.022661] FS: 00007f9679188700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 53.030881] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.036742] CR2: 0000000020000300 CR3: 000000009d829000 CR4: 00000000001406e0 [ 53.043995] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.051254] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.058502] Call Trace: [ 53.061074] ? __switch_to_asm+0x34/0x70 [ 53.065118] ? __switch_to_asm+0x40/0x70 [ 53.069161] ? __switch_to_asm+0x34/0x70 [ 53.073209] ? __switch_to_asm+0x40/0x70 [ 53.077256] ? __schedule+0x874/0x1ed0 [ 53.081129] ? __pskb_copy_fclone+0xe80/0xe80 [ 53.085607] ? graph_lock+0x270/0x270 [ 53.089390] ? graph_lock+0x270/0x270 [ 53.093171] ? graph_lock+0x270/0x270 [ 53.096959] ? graph_lock+0x270/0x270 [ 53.100750] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.106269] ? find_held_lock+0x36/0x1c0 [ 53.110315] __pskb_pull_tail+0x156/0x18a0 [ 53.114544] ? __might_fault+0x12b/0x1e0 [ 53.118594] ? skb_realloc_headroom+0x120/0x120 [ 53.123246] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 53.128678] ? __might_fault+0x1a3/0x1e0 [ 53.132720] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.138259] ? _copy_to_iter+0x3b8/0x1440 [ 53.142390] ? proto_seq_start+0x50/0x50 [ 53.146435] ip6_datagram_recv_specific_ctl+0x1953/0x1bf0 [ 53.151955] ? iov_iter_copy_from_user_atomic+0x1030/0x1030 [ 53.157649] ? ip6_datagram_recv_common_ctl+0x5c0/0x5c0 [ 53.162996] ? simple_copy_to_iter+0x35/0x40 [ 53.167403] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.172966] ? __skb_datagram_iter+0x1a7/0x7e0 [ 53.177530] ? rcu_pm_notify+0xc0/0xc0 [ 53.181396] ? skb_kill_datagram+0x120/0x120 [ 53.185796] ? skb_copy_datagram_iter+0x10d/0x4a0 [ 53.190638] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.196157] ? ip6_datagram_recv_common_ctl+0x35a/0x5c0 [ 53.201510] ? ipv6_recv_rxpmtu+0x920/0x920 [ 53.205814] ? arch_local_save_flags+0x40/0x40 [ 53.210377] ? __might_fault+0x12b/0x1e0 [ 53.214421] ? lock_downgrade+0x900/0x900 [ 53.218551] ip6_datagram_recv_ctl+0x33/0x40 [ 53.222945] rawv6_recvmsg+0xc4b/0xea0 [ 53.226814] ? rawv6_rcv_skb+0x480/0x480 [ 53.230857] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.236380] sock_common_recvmsg+0x13a/0x2a0 [ 53.240772] ? compat_sock_common_getsockopt+0x150/0x150 [ 53.246209] ? apparmor_socket_recvmsg+0x29/0x30 [ 53.250950] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.256498] ? security_socket_recvmsg+0x9c/0xc0 [ 53.261237] ? compat_sock_common_getsockopt+0x150/0x150 [ 53.266672] sock_recvmsg+0xd0/0x110 [ 53.270366] ? __sock_recv_ts_and_drops+0x420/0x420 [ 53.275363] ___sys_recvmsg+0x2b6/0x680 [ 53.279335] ? ___sys_sendmsg+0x930/0x930 [ 53.283469] ? release_sock+0x1ec/0x2c0 [ 53.287427] ? __local_bh_enable_ip+0x160/0x260 [ 53.292075] ? __fget_light+0x2e9/0x430 [ 53.296028] ? fget_raw+0x20/0x20 [ 53.299462] ? __local_bh_enable_ip+0x160/0x260 [ 53.304115] ? ip6_datagram_connect+0x3a/0x50 [ 53.308592] ? ip6_datagram_connect_v6_only+0x71/0x90 [ 53.313767] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.319291] ? sockfd_lookup_light+0xc5/0x160 [ 53.323767] __sys_recvmsg+0x11a/0x280 [ 53.327634] ? __ia32_sys_sendmmsg+0x100/0x100 [ 53.332218] ? __x64_sys_futex+0x476/0x690 [ 53.336440] ? do_syscall_64+0x9a/0x820 [ 53.340392] ? do_syscall_64+0x9a/0x820 [ 53.344349] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 53.349781] ? trace_hardirqs_off+0xb8/0x310 [ 53.354169] __x64_sys_recvmsg+0x78/0xb0 [ 53.358217] do_syscall_64+0x1b9/0x820 [ 53.362090] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.367435] ? syscall_return_slowpath+0x5e0/0x5e0 [ 53.372346] ? trace_hardirqs_on_caller+0x310/0x310 [ 53.377344] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 53.382340] ? recalc_sigpending_tsk+0x180/0x180 [ 53.387078] ? __switch_to_asm+0x40/0x70 [ 53.391118] ? __switch_to_asm+0x34/0x70 [ 53.395162] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.399995] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.405166] RIP: 0033:0x4457e9 [ 53.408346] Code: e8 6c b6 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.427227] RSP: 002b:00007f9679187da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f [ 53.434919] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 00000000004457e9 [ 53.442170] RDX: 0000000000000002 RSI: 0000000020000140 RDI: 0000000000000004 [ 53.449439] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 53.456689] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac3c [ 53.463940] R13: 0100000000000000 R14: 00007f96791889c0 R15: 00000000006dad2c [ 53.471198] Modules linked in: [ 53.474496] ---[ end trace fc66ec8aebcffacd ]--- [ 53.479292] RIP: 0010:pskb_expand_head+0xc24/0x10d0 [ 53.484355] Code: 8b 85 20 fe ff ff 48 85 c0 0f 84 44 fe ff ff e8 72 11 67 fb 4d 8d 74 24 ff e9 35 fe ff ff e8 63 11 67 fb 0f 0b e8 5c 11 67 fb <0f> 0b e8 55 11 67 fb 31 f6 31 ff e8 1c 12 67 fb e9 6a fd ff ff 4c [ 53.503309] RSP: 0018:ffff8880a4127190 EFLAGS: 00010293 [ 53.508656] RAX: ffff8880a5dd8240 RBX: ffff88809f5b2800 RCX: ffffffff861ad06a [ 53.515944] RDX: 0000000000000000 RSI: ffffffff861adae4 RDI: 0000000000000005 [ 53.523422] RBP: ffff8880a4127390 R08: ffff8880a5dd8240 R09: ffffed1013eb651a [ 53.530679] R10: ffffed1013eb651a R11: ffff88809f5b28d7 R12: ffff88809f5b28bc [ 53.538021] R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000000 [ 53.545322] FS: 00007f9679188700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 53.553567] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.559443] CR2: 0000000020000300 CR3: 000000009d829000 CR4: 00000000001406e0 [ 53.566761] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.574058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.581311] Kernel panic - not syncing: Fatal exception [ 53.587751] Kernel Offset: disabled [ 53.591374] Rebooting in 86400 seconds..