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: [   43.520868] Not allocated shadow for addr ffff8801d436c000 (page ffffea000af94880)
[   43.528590] Attempted to access 270 bytes
[   43.532736] ------------[ cut here ]------------
[   43.537725] kernel BUG at mm/kmsan/kmsan.c:1326!
[   43.542460] invalid opcode: 0000 [#1] SMP PTI
[   43.546930] Dumping ftrace buffer:
[   43.550443]    (ftrace buffer empty)
[   43.554127] Modules linked in:
[   43.557299] CPU: 0 PID: 4467 Comm: sshd Not tainted 4.16.0+ #87
[   43.563329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.572676] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   43.578272] RSP: 0018:ffff8801975ee648 EFLAGS: 00010082
[   43.583619] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000
[   43.590866] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   43.598117] RBP: ffff8801975ee660 R08: 0000000000000000 R09: 0000000000000001
[   43.605363] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d436c000
[   43.612609] R13: 000000000000010e R14: 0000000000000001 R15: 000000000000010e
[   43.619858] FS:  00007fcbfdec27c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   43.628060] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.633917] CR2: 00007fcbfd315f70 CR3: 00000001caafc000 CR4: 00000000001406f0
[   43.641164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.648411] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.655658] Call Trace:
[   43.658232]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   43.663401]  kmsan_unpoison_shadow+0x66/0xb0
[   43.667791]  virtqueue_get_buf_ctx+0x742/0xa20
[   43.672359]  virtqueue_get_buf+0x72/0x90
[   43.676402]  start_xmit+0x293/0x29a0
[   43.680093]  ? packet_rcv+0x21a0/0x21a0
[   43.684059]  ? virtnet_close+0x2c0/0x2c0
[   43.688098]  dev_hard_start_xmit+0x5f1/0xc70
[   43.692490]  sch_direct_xmit+0x540/0x8f0
[   43.696544]  __qdisc_run+0x1785/0x3730
[   43.700412]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   43.705756]  __dev_queue_xmit+0x1d50/0x3520
[   43.710058]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   43.715404]  dev_queue_xmit+0x4b/0x60
[   43.719192]  ip_finish_output2+0x12a1/0x1470
[   43.723580]  ip_finish_output+0xcb2/0xff0
[   43.727725]  ip_output+0x505/0x5d0
[   43.731246]  ? ip_mc_finish_output+0x3b0/0x3b0
[   43.735817]  ? ip_finish_output+0xff0/0xff0
[   43.740113]  ip_queue_xmit+0x1a1e/0x1d10
[   43.744160]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[   43.749596]  ? kmsan_set_origin+0x9e/0x160
[   43.753812]  ? ip_output+0x5d0/0x5d0
[   43.757503]  tcp_transmit_skb+0x3d81/0x53d0
[   43.761816]  tcp_write_xmit+0x3911/0xb920
[   43.765956]  __tcp_push_pending_frames+0x124/0x3f0
[   43.770863]  tcp_push+0x8b6/0x9c0
[   43.774305]  tcp_sendmsg_locked+0x5450/0x6cf0
[   43.778782]  ? kmsan_set_origin_inline+0x6b/0x120
[   43.783603]  ? __msan_poison_alloca+0x15c/0x1d0
[   43.788257]  tcp_sendmsg+0xb2/0x100
[   43.791862]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[   43.796509]  inet_sendmsg+0x48d/0x740
[   43.800289]  ? security_socket_sendmsg+0x9e/0x210
[   43.805109]  ? inet_getname+0x500/0x500
[   43.809061]  sock_write_iter+0x3b9/0x470
[   43.813274]  ? sock_read_iter+0x480/0x480
[   43.817399]  __vfs_write+0x7fb/0x9f0
[   43.821095]  vfs_write+0x463/0x8d0
[   43.824615]  SYSC_write+0x172/0x360
[   43.828227]  SyS_write+0x55/0x80
[   43.831571]  do_syscall_64+0x309/0x430
[   43.835437]  ? SYSC_read+0x360/0x360
[   43.839141]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.844308] RIP: 0033:0x7fcbfc25d370
[   43.848417] RSP: 002b:00007ffdc021f248 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   43.856102] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007fcbfc25d370
[   43.863349] RDX: 0000000000000138 RSI: 000055a8126b5440 RDI: 0000000000000003
[   43.870596] RBP: 000055a8126b5440 R08: 000055a8126b34e0 R09: 000055a811ac0820
[   43.877841] R10: 00000000671f7328 R11: 0000000000000246 R12: 00007ffdc021f2ac
[   43.885089] R13: 0000000000000001 R14: 000055a8126bb4a0 R15: 0000000000000000
[   43.892338] Code: 75 29 48 c7 c7 fd 92 7d 8a 31 c0 e8 4d 68 86 ff 80 3c 25 e8 03 2c 8b 00 75 11 48 c7 c7 2d 93 7d 8a 31 c0 4c 89 fe e8 32 68 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 
[   43.911420] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801975ee648
[   43.918502] ---[ end trace b8351b03454e093c ]---
[   43.923229] Kernel panic - not syncing: Fatal exception in interrupt
[   43.930171] Dumping ftrace buffer:
[   43.933688]    (ftrace buffer empty)
[   43.937371] Kernel Offset: disabled
[   43.940974] Rebooting in 86400 seconds..