[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 30.237924] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 30.816880] random: sshd: uninitialized urandom read (32 bytes read) [ 31.309676] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.412787] random: sshd: uninitialized urandom read (32 bytes read) [ 32.624786] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 38.106700] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.288343] Not allocated shadow for addr ffff8801d39a8000 (page ffffea000af59f00) [ 38.296106] Attempted to access 814 bytes [ 38.300305] ------------[ cut here ]------------ [ 38.305054] kernel BUG at mm/kmsan/kmsan.c:1378! [ 38.309812] invalid opcode: 0000 [#1] SMP PTI [ 38.314298] Dumping ftrace buffer: [ 38.317826] (ftrace buffer empty) [ 38.321530] Modules linked in: [ 38.324725] CPU: 1 PID: 4468 Comm: sshd Not tainted 4.17.0+ #5 [ 38.330687] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.340050] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 38.345669] RSP: 0018:ffff880197b4e6f0 EFLAGS: 00010082 [ 38.351027] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000 [ 38.358291] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 38.365557] RBP: ffff880197b4e708 R08: 0000000000000000 R09: 0000000000000001 [ 38.372823] R10: 0000000000000000 R11: ffffffff86575280 R12: ffff8801d39a8000 [ 38.380087] R13: 000000000000032e R14: 0000000000000001 R15: 000000000000032e [ 38.387356] FS: 00007f39d4e567c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 38.395577] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.401454] CR2: 00007f38881c31c4 CR3: 00000001b6592000 CR4: 00000000001406e0 [ 38.408720] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.415985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.423245] Call Trace: [ 38.425839] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 38.431034] kmsan_unpoison_shadow+0x66/0xb0 [ 38.435846] virtqueue_get_buf_ctx+0x73f/0xa20 [ 38.440436] virtqueue_get_buf+0x72/0x90 [ 38.444496] start_xmit+0x293/0x29c0 [ 38.448208] ? packet_rcv+0x2210/0x2210 [ 38.452195] ? virtnet_close+0x2c0/0x2c0 [ 38.456268] dev_hard_start_xmit+0x5f6/0xc80 [ 38.460686] sch_direct_xmit+0x578/0x8f0 [ 38.464751] __qdisc_run+0x1822/0x3730 [ 38.468660] __dev_queue_xmit+0x2069/0x3540 [ 38.472992] dev_queue_xmit+0x4b/0x60 [ 38.476796] ip_finish_output2+0x12a8/0x1480 [ 38.481210] ip_finish_output+0xcbc/0x1000 [ 38.485445] ip_output+0x505/0x5d0 [ 38.488985] ? ip_mc_finish_output+0x3b0/0x3b0 [ 38.493567] ? ip_finish_output+0x1000/0x1000 [ 38.498667] ip_queue_xmit+0x1b0f/0x1d00 [ 38.502727] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 38.508181] ? __skb_clone+0x6ec/0x990 [ 38.512072] ? ip_output+0x5d0/0x5d0 [ 38.515793] tcp_transmit_skb+0x3db5/0x5350 [ 38.520130] tcp_write_xmit+0x2d81/0xb200 [ 38.524307] __tcp_push_pending_frames+0x124/0x400 [ 38.529238] tcp_push+0x803/0x8f0 [ 38.532698] tcp_sendmsg_locked+0x4eb1/0x6610 [ 38.537220] tcp_sendmsg+0xb2/0x100 [ 38.540846] ? tcp_sendmsg_locked+0x6610/0x6610 [ 38.545514] inet_sendmsg+0x3fc/0x760 [ 38.549314] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 38.554675] ? inet_getname+0x4a0/0x4a0 [ 38.558646] sock_write_iter+0x3bc/0x470 [ 38.562709] ? sock_read_iter+0x480/0x480 [ 38.566856] __vfs_write+0x808/0x9f0 [ 38.570572] vfs_write+0x467/0x8c0 [ 38.574114] __x64_sys_write+0x1bf/0x3e0 [ 38.578172] ? ksys_write+0x360/0x360 [ 38.581968] do_syscall_64+0x15b/0x230 [ 38.585852] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 38.591045] RIP: 0033:0x7f39d31f1370 [ 38.594747] RSP: 002b:00007ffce4d33f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 38.602454] RAX: ffffffffffffffda RBX: 0000000000000068 RCX: 00007f39d31f1370 [ 38.609717] RDX: 0000000000000068 RSI: 000055cdb18e0440 RDI: 0000000000000003 [ 38.616982] RBP: 000055cdb18e0440 R08: 0000000000000001 R09: 7475636578650a6d [ 38.624246] R10: 676f727020676e69 R11: 0000000000000246 R12: 00007ffce4d33f8c [ 38.631520] R13: 000055cdb14c1fb4 R14: 0000000000000028 R15: 000055cdb14c3ca0 [ 38.638783] Code: 75 29 48 c7 c7 59 38 97 8a 31 c0 e8 ad 4e 80 ff 80 3c 25 f8 93 53 8b 00 75 11 48 c7 c7 89 38 97 8a 31 c0 4c 89 fe e8 92 4e 80 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 [ 38.657982] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff880197b4e6f0 [ 38.665078] ---[ end trace 647505433c9ebf3b ]--- [ 38.669826] Kernel panic - not syncing: Fatal exception in interrupt [ 38.676780] Dumping ftrace buffer: [ 38.680309] (ftrace buffer empty) [ 38.683992] Kernel Offset: disabled [ 38.687594] Rebooting in 86400 seconds..