[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 29.861229] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.897181] random: sshd: uninitialized urandom read (32 bytes read) [ 33.342710] random: sshd: uninitialized urandom read (32 bytes read) [ 34.481313] random: sshd: uninitialized urandom read (32 bytes read) [ 815.240719] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. [ 820.727199] random: sshd: uninitialized urandom read (32 bytes read) [ 820.853123] IPVS: ftp: loaded support on port[0] = 21 [ 820.853712] IPVS: ftp: loaded support on port[0] = 21 [ 820.862245] IPVS: ftp: loaded support on port[0] = 21 [ 820.865864] IPVS: ftp: loaded support on port[0] = 21 [ 820.871413] IPVS: ftp: loaded support on port[0] = 21 [ 820.878823] IPVS: ftp: loaded support on port[0] = 21 [ 820.882050] IPVS: ftp: loaded support on port[0] = 21 [ 820.886447] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 822.531352] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 822.617922] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... [ 822.720898] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... [ 822.740717] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... executing program executing program executing program executing program executing program executing program executing program executing program [ 822.741358] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... [ 822.762964] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 822.765076] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... [ 822.852616] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... [ 822.855860] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 822.864097] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-5, throttling... [ 823.503254] Not allocated shadow for addr ffff88019be00000 (page ffffea0009a74000) [ 823.522271] Attempted to access 14 bytes [ 823.526358] ------------[ cut here ]------------ [ 823.531125] kernel BUG at mm/kmsan/kmsan.c:1378! [ 823.535890] invalid opcode: 0000 [#1] SMP PTI [ 823.540385] Dumping ftrace buffer: [ 823.543918] (ftrace buffer empty) [ 823.547639] Modules linked in: [ 823.550933] CPU: 0 PID: 4461 Comm: sshd Not tainted 4.17.0+ #6 [ 823.557072] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 823.566442] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 823.572062] RSP: 0018:ffff8801d86ae6f0 EFLAGS: 00010082 [ 823.577425] RAX: 000000000000001c RBX: 0000000000000660 RCX: 0000000000000000 [ 823.584713] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 823.591983] RBP: ffff8801d86ae708 R08: 0000000000000000 R09: 0000000000000001 [ 823.599255] R10: 0000000000000000 R11: ffffffff86575770 R12: ffff88019be00000 [ 823.606527] R13: 000000000000000e R14: 0000000000000001 R15: 000000000000000e [ 823.613799] FS: 00007f5f3078a7c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 823.622026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 823.627910] CR2: 00007f44ccbd6b40 CR3: 00000001c31de000 CR4: 00000000001406f0 [ 823.635192] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 823.642460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 823.649737] Call Trace: [ 823.652339] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 823.657546] kmsan_unpoison_shadow+0x66/0xb0 [ 823.661979] virtqueue_get_buf_ctx+0x73f/0xa20 [ 823.666576] virtqueue_get_buf+0x72/0x90 [ 823.670646] start_xmit+0x293/0x29c0 [ 823.674368] ? packet_rcv+0x2210/0x2210 [ 823.678355] ? virtnet_close+0x2c0/0x2c0 [ 823.682424] dev_hard_start_xmit+0x5f6/0xc80 [ 823.686863] sch_direct_xmit+0x578/0x8f0 [ 823.690951] __qdisc_run+0x1822/0x3730 [ 823.694864] __dev_queue_xmit+0x2069/0x3540 [ 823.699213] dev_queue_xmit+0x4b/0x60 [ 823.703023] ip_finish_output2+0x12a8/0x1480 [ 823.707443] ip_finish_output+0xcbc/0x1000 [ 823.711686] ip_output+0x505/0x5d0 [ 823.715227] ? ip_mc_finish_output+0x3b0/0x3b0 [ 823.719812] ? ip_finish_output+0x1000/0x1000 [ 823.724308] ip_queue_xmit+0x1b0f/0x1d00 [ 823.728375] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 823.733829] ? __skb_clone+0x6ec/0x990 [ 823.737727] ? ip_output+0x5d0/0x5d0 [ 823.741468] tcp_transmit_skb+0x3db5/0x5350 [ 823.745812] tcp_write_xmit+0x2d81/0xb200 [ 823.749992] __tcp_push_pending_frames+0x124/0x400 [ 823.754934] tcp_push+0x803/0x8f0 [ 823.758391] tcp_sendmsg_locked+0x4eb1/0x6610 [ 823.762907] tcp_sendmsg+0xb2/0x100 [ 823.766538] ? tcp_sendmsg_locked+0x6610/0x6610 [ 823.771211] inet_sendmsg+0x3fc/0x760 [ 823.775042] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 823.780413] ? inet_getname+0x4a0/0x4a0 [ 823.784389] sock_write_iter+0x3bc/0x470 [ 823.788469] ? sock_read_iter+0x480/0x480 [ 823.792623] __vfs_write+0x808/0x9f0 [ 823.796349] vfs_write+0x467/0x8c0 [ 823.799900] __x64_sys_write+0x1bf/0x3e0 [ 823.803974] ? ksys_write+0x360/0x360 [ 823.807803] do_syscall_64+0x15b/0x230 [ 823.811703] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 823.816889] RIP: 0033:0x7f5f2eb25370 [ 823.820594] RSP: 002b:00007fffe2faa6b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 823.828302] RAX: ffffffffffffffda RBX: 00000000000002a8 RCX: 00007f5f2eb25370 [ 823.835610] RDX: 00000000000002a8 RSI: 000055663cccc440 RDI: 0000000000000003 [ 823.842887] RBP: 000055663cccc440 R08: 0000000000000001 R09: 7475636578650a6d [ 823.850170] R10: 676f727020676e69 R11: 0000000000000246 R12: 00007fffe2faa71c [ 823.857450] R13: 000055663bf76fb4 R14: 0000000000000028 R15: 000055663bf78ca0 [ 823.864723] Code: 75 29 48 c7 c7 59 38 97 8a 31 c0 e8 fd 4c 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 e2 4c 80 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 [ 823.883972] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801d86ae6f0 [ 823.891081] ---[ end trace dcbceca5f3a6994f ]--- [ 823.895841] Kernel panic - not syncing: Fatal exception in interrupt [ 823.902904] Dumping ftrace buffer: [ 823.906440] (ftrace buffer empty) [ 823.910216] Kernel Offset: disabled [ 823.913819] Rebooting in 86400 seconds..