[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.579385] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.425488] random: sshd: uninitialized urandom read (32 bytes read) [ 36.892960] random: sshd: uninitialized urandom read (32 bytes read) [ 38.333548] random: sshd: uninitialized urandom read (32 bytes read) [ 38.560361] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.0' (ECDSA) to the list of known hosts. [ 43.964954] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/21 11:27:32 parsed 1 programs [ 45.466046] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/21 11:27:34 executed programs: 0 [ 46.885096] IPVS: ftp: loaded support on port[0] = 21 [ 47.612202] BUG: unable to handle kernel paging request at ffff8801b2b1fffc [ 47.619347] PGD c316067 P4D c316067 PUD 1a11a6063 PMD 1a2ec2063 PTE 80000001b2b1f061 [ 47.627229] Oops: 0003 [#1] SMP PTI [ 47.630838] CPU: 0 PID: 4668 Comm: syz-executor0 Not tainted 4.18.0-rc5+ #29 [ 47.638007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.647367] RIP: 0010:kmsan_memmove_origins+0x171/0x1d0 [ 47.652707] Code: 45 85 ed 74 1a 41 39 df 74 15 be 01 00 00 00 44 89 ff e8 62 fc ff ff 89 c3 85 c0 41 0f 44 df 45 85 ed 44 0f 45 eb 48 8b 45 98 <46> 89 2c 20 49 63 c6 44 8d 70 01 49 83 c4 fc 48 39 45 a8 77 8a 4c [ 47.671872] RSP: 0018:ffff8801a839f120 EFLAGS: 00010046 [ 47.677233] RAX: ffff8801b2b20008 RBX: 0000000000000000 RCX: 00000001be620078 [ 47.684484] RDX: 00000000000006c0 RSI: ffff88021fff2000 RDI: 00000000000006c0 [ 47.691737] RBP: ffff8801a839f188 R08: ffffffff7fffffff R09: ffffffffffffffff [ 47.699005] R10: ffffffffffffffff R11: ffffffffffffffff R12: fffffffffffffff4 [ 47.706268] R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000 [ 47.713524] FS: 000000000140a940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 47.721745] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.727610] CR2: ffff8801b2b1fffc CR3: 00000001b40b8000 CR4: 00000000001406f0 [ 47.734866] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.742142] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.749830] Call Trace: [ 47.752409] __msan_memmove+0xe7/0x150 [ 47.756288] nf_ct_frag6_gather+0x436a/0x5870 [ 47.760787] ipv6_defrag+0x501/0x5c0 [ 47.764494] ? defrag6_net_exit+0xe0/0xe0 [ 47.768639] nf_hook_slow+0x15d/0x3e0 [ 47.772454] ipv6_rcv+0x1df5/0x2250 [ 47.776095] ? local_bh_enable+0x40/0x40 [ 47.780151] __netif_receive_skb_core+0x4a7a/0x4fc0 [ 47.785175] ? ip6_rcv_finish+0x6e0/0x6e0 [ 47.789335] netif_receive_skb_internal+0x475/0x660 [ 47.794361] netif_receive_skb+0x246/0x270 [ 47.798597] tun_get_user+0x80f6/0x89c0 [ 47.802586] tun_chr_write_iter+0x1d4/0x330 [ 47.806895] ? tun_chr_read_iter+0x460/0x460 [ 47.811288] do_iter_readv_writev+0x81a/0xac0 [ 47.815776] ? tun_chr_read_iter+0x460/0x460 [ 47.820174] do_iter_write+0x30d/0xd50 [ 47.824065] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 47.829510] ? import_iovec+0x3e0/0x640 [ 47.833476] do_writev+0x3d8/0x860 [ 47.837011] ? kmsan_set_origin_inline+0x6b/0x120 [ 47.841849] ? __msan_poison_alloca+0x183/0x220 [ 47.846507] __x64_sys_writev+0xe1/0x120 [ 47.850557] ? __ia32_sys_readv+0x120/0x120 [ 47.854863] do_syscall_64+0x15b/0x230 [ 47.858741] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 47.863913] RIP: 0033:0x455950 [ 47.867083] Code: 05 48 3d 01 f0 ff ff 0f 83 7d bb fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 01 0b 5f 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 54 bb fb ff c3 48 83 ec 08 e8 da 2c 00 00 [ 47.886235] RSP: 002b:0000000000a3e818 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 47.893940] RAX: ffffffffffffffda RBX: 000000000000fdef RCX: 0000000000455950 [ 47.901196] RDX: 0000000000000001 RSI: 0000000000a3e860 RDI: 00000000000000fc [ 47.908449] RBP: 0000000020000700 R08: 00000000000000fc R09: 0000000000000000 [ 47.915703] R10: 000000000000fdef R11: 0000000000000246 R12: 00000000ffffffff [ 47.922958] R13: 00000000004c20a6 R14: 00000000004d3ae0 R15: 0000000000000001 [ 47.930215] Modules linked in: [ 47.933404] Dumping ftrace buffer: [ 47.936923] (ftrace buffer empty) [ 47.940634] CR2: ffff8801b2b1fffc [ 47.944091] ---[ end trace b13b1c66910aa714 ]--- [ 47.948839] RIP: 0010:kmsan_memmove_origins+0x171/0x1d0 [ 47.954179] Code: 45 85 ed 74 1a 41 39 df 74 15 be 01 00 00 00 44 89 ff e8 62 fc ff ff 89 c3 85 c0 41 0f 44 df 45 85 ed 44 0f 45 eb 48 8b 45 98 <46> 89 2c 20 49 63 c6 44 8d 70 01 49 83 c4 fc 48 39 45 a8 77 8a 4c [ 47.973348] RSP: 0018:ffff8801a839f120 EFLAGS: 00010046 [ 47.978694] RAX: ffff8801b2b20008 RBX: 0000000000000000 RCX: 00000001be620078 [ 47.985959] RDX: 00000000000006c0 RSI: ffff88021fff2000 RDI: 00000000000006c0 [ 47.993214] RBP: ffff8801a839f188 R08: ffffffff7fffffff R09: ffffffffffffffff [ 48.000480] R10: ffffffffffffffff R11: ffffffffffffffff R12: fffffffffffffff4 [ 48.007748] R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000 [ 48.015023] FS: 000000000140a940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 48.023251] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.029127] CR2: ffff8801b2b1fffc CR3: 00000001b40b8000 CR4: 00000000001406f0 [ 48.036381] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.043635] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.050887] Kernel panic - not syncing: Fatal exception in interrupt [ 48.057846] Dumping ftrace buffer: [ 48.061374] (ftrace buffer empty) [ 48.065063] Kernel Offset: disabled [ 48.068669] Rebooting in 86400 seconds..