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: [   29.484721] Not allocated shadow for addr ffff8801dc838000 (page ffffea000b2b1500)
[   29.492474] Attempted to access 774 bytes
[   29.496641] ------------[ cut here ]------------
[   29.501383] kernel BUG at mm/kmsan/kmsan.c:1326!
[   29.506121] invalid opcode: 0000 [#1] SMP PTI
[   29.510590] Dumping ftrace buffer:
[   29.514101]    (ftrace buffer empty)
[   29.517799] Modules linked in:
[   29.520972] CPU: 0 PID: 3579 Comm: sshd Not tainted 4.16.0+ #82
[   29.527001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.536351] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   29.541948] RSP: 0018:ffff8801c8dde638 EFLAGS: 00010086
[   29.547301] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   29.554550] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   29.561800] RBP: ffff8801c8dde650 R08: 0000000000000000 R09: 0000000000000001
[   29.569047] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dc838000
[   29.576328] R13: 0000000000000306 R14: 0000000000000001 R15: 0000000000000306
[   29.583576] FS:  00007f24f8b347c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   29.591802] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.597660] CR2: 00007f24f7f87f70 CR3: 00000001cc4c2000 CR4: 00000000001406f0
[   29.604915] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.612162] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.619414] Call Trace:
[   29.621992]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   29.627165]  kmsan_unpoison_shadow+0x66/0xb0
[   29.631552]  virtqueue_get_buf_ctx+0x742/0xa20
[   29.636115]  virtqueue_get_buf+0x72/0x90
[   29.640163]  start_xmit+0x276/0x2840
[   29.643858]  ? virtnet_close+0x2c0/0x2c0
[   29.647901]  dev_hard_start_xmit+0x5f1/0xc70
[   29.652293]  sch_direct_xmit+0x540/0x8f0
[   29.656333]  __qdisc_run+0x1785/0x3730
[   29.660200]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   29.666284]  __dev_queue_xmit+0x174a/0x2b60
[   29.670589]  dev_queue_xmit+0x4b/0x60
[   29.674372]  ip_finish_output2+0x1198/0x1380
[   29.678777]  ip_finish_output+0xcb0/0xff0
[   29.682908]  ip_output+0x502/0x5c0
[   29.686422]  ? ip_mc_finish_output+0x3b0/0x3b0
[   29.690990]  ? ip_finish_output+0xff0/0xff0
[   29.695293]  ip_queue_xmit+0x1fae/0x21c0
[   29.699338]  ? __ip_local_out+0x5b0/0x5b0
[   29.703470]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   29.708897]  ? __skb_clone+0x6de/0x980
[   29.712765]  ? ip_output+0x5c0/0x5c0
[   29.716460]  tcp_transmit_skb+0x38be/0x51f0
[   29.720765]  tcp_write_xmit+0x4311/0xb920
[   29.724903]  __tcp_push_pending_frames+0x124/0x3f0
[   29.729818]  tcp_push+0x8b6/0x9c0
[   29.733251]  tcp_sendmsg_locked+0x5445/0x6d20
[   29.737729]  ? local_bh_enable+0x36/0x40
[   29.741772]  ? local_bh_enable+0x36/0x40
[   29.745817]  tcp_sendmsg+0xb2/0x100
[   29.749420]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   29.754064]  inet_sendmsg+0x48d/0x740
[   29.757845]  ? security_socket_sendmsg+0x9e/0x210
[   29.762668]  ? inet_getname+0x500/0x500
[   29.766622]  sock_write_iter+0x3b9/0x470
[   29.770664]  ? sock_read_iter+0x480/0x480
[   29.774788]  __vfs_write+0x719/0x910
[   29.778486]  vfs_write+0x463/0x8d0
[   29.782004]  SYSC_write+0x172/0x360
[   29.785615]  SyS_write+0x55/0x80
[   29.788956]  do_syscall_64+0x309/0x430
[   29.792839]  ? SYSC_read+0x360/0x360
[   29.796538]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   29.801710] RIP: 0033:0x7f24f6ecf370
[   29.805393] RSP: 002b:00007ffc2578e758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   29.813074] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f24f6ecf370
[   29.820321] RDX: 0000000000000138 RSI: 0000557fda0ce430 RDI: 0000000000000003
[   29.827563] RBP: 0000557fda0ce430 R08: 0000557fda0cd270 R09: 0000557fd89a6820
[   29.834807] R10: 000000003e2252a9 R11: 0000000000000246 R12: 00007ffc2578e7bc
[   29.842051] R13: 0000000000000001 R14: 0000557fda0d4490 R15: 0000000000000000
[   29.849300] 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 
[   29.868386] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801c8dde638
[   29.875464] ---[ end trace 04100d387eef1cf0 ]---
[   29.880189] Kernel panic - not syncing: Fatal exception in interrupt
[   29.887132] Dumping ftrace buffer:
[   29.890647]    (ftrace buffer empty)
[   29.894327] Kernel Offset: disabled
[   29.897922] Rebooting in 86400 seconds..