INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   47.164954] Not allocated shadow for addr ffff8801dca38000 (page ffffea000b2bd500)
[   47.172682] Attempted to access 262 bytes
[   47.176829] ------------[ cut here ]------------
[   47.181557] kernel BUG at mm/kmsan/kmsan.c:1326!
[   47.186292] invalid opcode: 0000 [#1] SMP PTI
[   47.190762] Dumping ftrace buffer:
[   47.194273]    (ftrace buffer empty)
[   47.197956] Modules linked in:
[   47.201130] CPU: 1 PID: 3581 Comm: sshd Not tainted 4.16.0+ #82
[   47.207160] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.216499] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   47.222095] RSP: 0018:ffff8801a5b8e638 EFLAGS: 00010086
[   47.227433] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   47.234678] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   47.241922] RBP: ffff8801a5b8e650 R08: 0000000000000000 R09: 0000000000000001
[   47.249165] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dca38000
[   47.256423] R13: 0000000000000106 R14: 0000000000000001 R15: 0000000000000106
[   47.263669] FS:  00007f461b61f7c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   47.271872] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.277739] CR2: 00007f461add2fb0 CR3: 00000001a5428000 CR4: 00000000001406e0
[   47.284993] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.292247] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.299489] Call Trace:
[   47.302059]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   47.307224]  kmsan_unpoison_shadow+0x66/0xb0
[   47.311617]  virtqueue_get_buf_ctx+0x742/0xa20
[   47.316177]  virtqueue_get_buf+0x72/0x90
[   47.320214]  start_xmit+0x276/0x2840
[   47.323905]  ? virtnet_close+0x2c0/0x2c0
[   47.327942]  dev_hard_start_xmit+0x5f1/0xc70
[   47.332329]  sch_direct_xmit+0x540/0x8f0
[   47.336368]  __qdisc_run+0x1785/0x3730
[   47.340231]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   47.345573]  __dev_queue_xmit+0x174a/0x2b60
[   47.349895]  dev_queue_xmit+0x4b/0x60
[   47.353671]  ip_finish_output2+0x1198/0x1380
[   47.358058]  ip_finish_output+0xcb0/0xff0
[   47.362196]  ip_output+0x502/0x5c0
[   47.365709]  ? ip_mc_finish_output+0x3b0/0x3b0
[   47.370273]  ? ip_finish_output+0xff0/0xff0
[   47.374566]  ip_queue_xmit+0x1fae/0x21c0
[   47.378613]  ? __ip_local_out+0x5b0/0x5b0
[   47.382746]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   47.388173]  ? __skb_clone+0x6de/0x980
[   47.392039]  ? ip_output+0x5c0/0x5c0
[   47.395732]  tcp_transmit_skb+0x38be/0x51f0
[   47.400050]  tcp_write_xmit+0x4311/0xb920
[   47.404191]  __tcp_push_pending_frames+0x124/0x3f0
[   47.409094]  tcp_push+0x8b6/0x9c0
[   47.412526]  tcp_sendmsg_locked+0x5445/0x6d20
[   47.417002]  ? local_bh_enable+0x36/0x40
[   47.421040]  ? local_bh_enable+0x36/0x40
[   47.425077]  tcp_sendmsg+0xb2/0x100
[   47.428679]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   47.433322]  inet_sendmsg+0x48d/0x740
[   47.437099]  ? security_socket_sendmsg+0x9e/0x210
[   47.441920]  ? inet_getname+0x500/0x500
[   47.445874]  sock_write_iter+0x3b9/0x470
[   47.449914]  ? sock_read_iter+0x480/0x480
[   47.454038]  __vfs_write+0x719/0x910
[   47.457731]  vfs_write+0x463/0x8d0
[   47.461250]  SYSC_write+0x172/0x360
[   47.464857]  SyS_write+0x55/0x80
[   47.468205]  do_syscall_64+0x309/0x430
[   47.472068]  ? SYSC_read+0x360/0x360
[   47.475759]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   47.480921] RIP: 0033:0x7f46199ba370
[   47.484604] RSP: 002b:00007ffe8efe4ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   47.492285] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f46199ba370
[   47.499528] RDX: 0000000000000138 RSI: 0000557c996cd440 RDI: 0000000000000003
[   47.507371] RBP: 0000557c996cd440 R08: 0000557c996cb240 R09: 0000557c97ab9820
[   47.514616] R10: 0000000034c72d8a R11: 0000000000000246 R12: 00007ffe8efe4b4c
[   47.521859] R13: 0000000000000001 R14: 0000557c996d34a0 R15: 0000000000000000
[   47.529110] Code: 75 29 48 c7 c7 71 2a a1 87 31 c0 e8 0d 11 86 ff 80 3c 25 a8 a4 2d 88 00 75 11 48 c7 c7 a1 2a a1 87 31 c0 4c 89 fe e8 f2 10 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 
[   47.548209] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801a5b8e638
[   47.555290] ---[ end trace b4d0cf21d5f107d7 ]---
[   47.560027] Kernel panic - not syncing: Fatal exception in interrupt
[   47.566890] Dumping ftrace buffer:
[   47.570406]    (ftrace buffer empty)
[   47.574086] Kernel Offset: disabled
[   47.577687] Rebooting in 86400 seconds..