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: [   96.646969] Not allocated shadow for addr ffff8801dc9fc000 (page ffffea000b2bbe80)
[   96.654692] Attempted to access 262 bytes
[   96.658840] ------------[ cut here ]------------
[   96.663565] kernel BUG at mm/kmsan/kmsan.c:1326!
[   96.668296] invalid opcode: 0000 [#1] SMP PTI
[   96.672762] Dumping ftrace buffer:
[   96.676271]    (ftrace buffer empty)
[   96.679954] Modules linked in:
[   96.683124] CPU: 0 PID: 3576 Comm: sshd Not tainted 4.16.0+ #83
[   96.689150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   96.698484] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   96.704075] RSP: 0018:ffff8801a3d3e638 EFLAGS: 00010086
[   96.709408] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   96.716651] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   96.723890] RBP: ffff8801a3d3e650 R08: 0000000000000000 R09: 0000000000000001
[   96.731130] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dc9fc000
[   96.738372] R13: 0000000000000106 R14: 0000000000000001 R15: 0000000000000106
[   96.745618] FS:  00007f6163aba7c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   96.753814] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   96.759667] CR2: 00007f6162f0df70 CR3: 00000001ca7a4000 CR4: 00000000001406f0
[   96.766912] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   96.774154] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   96.781394] Call Trace:
[   96.783969]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   96.789138]  kmsan_unpoison_shadow+0x66/0xb0
[   96.793523]  virtqueue_get_buf_ctx+0x742/0xa20
[   96.798082]  virtqueue_get_buf+0x72/0x90
[   96.802116]  start_xmit+0x276/0x2840
[   96.806009]  ? virtnet_close+0x2c0/0x2c0
[   96.810046]  dev_hard_start_xmit+0x5f1/0xc70
[   96.814432]  sch_direct_xmit+0x540/0x8f0
[   96.818466]  __qdisc_run+0x1785/0x3730
[   96.822326]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   96.827666]  __dev_queue_xmit+0x174a/0x2b60
[   96.831965]  dev_queue_xmit+0x4b/0x60
[   96.835739]  ip_finish_output2+0x1198/0x1380
[   96.840122]  ip_finish_output+0xcb0/0xff0
[   96.844246]  ip_output+0x502/0x5c0
[   96.847756]  ? ip_mc_finish_output+0x3b0/0x3b0
[   96.852310]  ? ip_finish_output+0xff0/0xff0
[   96.856604]  ip_queue_xmit+0x1fae/0x21c0
[   96.860637]  ? __ip_local_out+0x5b0/0x5b0
[   96.864757]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   96.870177]  ? __skb_clone+0x6de/0x980
[   96.874039]  ? ip_output+0x5c0/0x5c0
[   96.877723]  tcp_transmit_skb+0x38be/0x51f0
[   96.882022]  tcp_write_xmit+0x4311/0xb920
[   96.886154]  __tcp_push_pending_frames+0x124/0x3f0
[   96.891056]  tcp_push+0x8b6/0x9c0
[   96.894485]  tcp_sendmsg_locked+0x5445/0x6d20
[   96.898958]  ? local_bh_enable+0x36/0x40
[   96.902992]  ? local_bh_enable+0x36/0x40
[   96.907025]  tcp_sendmsg+0xb2/0x100
[   96.910632]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   96.915275]  inet_sendmsg+0x48d/0x740
[   96.919050]  ? security_socket_sendmsg+0x9e/0x210
[   96.923868]  ? inet_getname+0x500/0x500
[   96.927816]  sock_write_iter+0x3b9/0x470
[   96.931853]  ? sock_read_iter+0x480/0x480
[   96.935972]  __vfs_write+0x719/0x910
[   96.939663]  vfs_write+0x463/0x8d0
[   96.943177]  SYSC_write+0x172/0x360
[   96.946777]  SyS_write+0x55/0x80
[   96.950115]  do_syscall_64+0x309/0x430
[   96.953979]  ? SYSC_read+0x360/0x360
[   96.957667]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   96.962828] RIP: 0033:0x7f6161e55370
[   96.966509] RSP: 002b:00007fff25f13808 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   96.974193] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f6161e55370
[   96.981440] RDX: 0000000000000138 RSI: 00005574fbfe6450 RDI: 0000000000000003
[   96.988683] RBP: 00005574fbfe6450 R08: 00005574fbfe4590 R09: 00005574facf4820
[   96.995926] R10: 000000000623f2f4 R11: 0000000000000246 R12: 00007fff25f1386c
[   97.003169] R13: 0000000000000001 R14: 00005574fbfec4b0 R15: 0000000000000000
[   97.010411] 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 
[   97.029486] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801a3d3e638
[   97.036565] ---[ end trace 8fbe424aa14340fc ]---
[   97.041298] Kernel panic - not syncing: Fatal exception in interrupt
[   97.048132] Dumping ftrace buffer:
[   97.051651]    (ftrace buffer empty)
[   97.055333] Kernel Offset: disabled
[   97.058929] Rebooting in 86400 seconds..