[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.297091] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.521614] random: sshd: uninitialized urandom read (32 bytes read) [ 37.893241] random: sshd: uninitialized urandom read (32 bytes read) [ 39.383588] random: sshd: uninitialized urandom read (32 bytes read) [ 39.618109] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.37' (ECDSA) to the list of known hosts. [ 45.214218] random: sshd: uninitialized urandom read (32 bytes read) [ 45.339794] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.800741] PANIC: double fault, error_code: 0x0 [ 46.805691] CPU: 1 PID: 4832 Comm: syz-executor471 Not tainted 4.18.0-rc4+ #25 [ 46.813073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.822548] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 46.828174] Code: ff 48 01 cb e9 11 02 00 00 65 44 8b 3c 25 20 a1 02 00 48 b8 00 00 00 00 00 02 00 00 4c 01 e8 48 3d ff 0f ec 00 77 35 44 89 ff aa 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af [ 46.847613] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 46.852976] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 46.860246] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 46.867511] RBP: fffffe000003d030 R08: 0000000000000000 R09: 0000000000000000 [ 46.874862] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 46.882146] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 46.889498] FS: 0000000000fc0880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 46.897724] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.903596] CR2: fffffe000003cff8 CR3: 0000000198b60000 CR4: 00000000001406e0 [ 46.910867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.918137] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.925422] Call Trace: [ 46.928020] [ 46.931313] kmsan_memmove_shadow+0x87/0xe0 [ 46.935636] __msan_memmove+0xb7/0x150 [ 46.939526] fixup_bad_iret+0x85/0x110 [ 46.943418] error_entry+0xe8/0x100 [ 46.947047] RIP: 0000:0xfdef [ 46.950066] Code: Bad RIP value. [ 46.953451] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 46.961159] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 46.968442] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 46.975710] RBP: 0000000000000000 R08: 000000000000b6c7 R09: 0000000000402670 [ 46.982991] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000b6c7 [ 46.990259] R13: 0000000000402670 R14: 0000000000000000 R15: 0000000000000000 [ 46.997553] ? general_protection+0x8/0x30 [ 47.001804] ? general_protection+0x8/0x30 [ 47.006074] [ 47.009459] Kernel panic - not syncing: Machine halted. [ 47.014832] CPU: 1 PID: 4832 Comm: syz-executor471 Not tainted 4.18.0-rc4+ #25 [ 47.022181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.031546] Call Trace: [ 47.034124] <#DF> [ 47.036294] dump_stack+0x185/0x1e0 [ 47.039919] panic+0x3d0/0x9b0 [ 47.043121] ? show_regs+0xcc/0x100 [ 47.046854] df_debug+0xa6/0xb0 [ 47.050142] do_double_fault+0x30f/0x420 [ 47.054206] double_fault+0x1e/0x30 [ 47.057837] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 47.063441] Code: ff 48 01 cb e9 11 02 00 00 65 44 8b 3c 25 20 a1 02 00 48 b8 00 00 00 00 00 02 00 00 4c 01 e8 48 3d ff 0f ec 00 77 35 44 89 ff aa 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af [ 47.082655] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 47.088030] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 47.095316] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 47.103463] RBP: fffffe000003d030 R08: 0000000000000000 R09: 0000000000000000 [ 47.110728] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 47.117996] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 47.125277] ? general_protection+0x8/0x30 [ 47.129531] ? general_protection+0x8/0x30 [ 47.133752] [ 47.135975] [ 47.139251] kmsan_memmove_shadow+0x87/0xe0 [ 47.143581] __msan_memmove+0xb7/0x150 [ 47.147474] fixup_bad_iret+0x85/0x110 [ 47.151446] error_entry+0xe8/0x100 [ 47.155074] RIP: 0000:0xfdef [ 47.158110] Code: Bad RIP value. [ 47.162790] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 47.170597] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 47.177890] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 47.185178] RBP: 0000000000000000 R08: 000000000000b6c7 R09: 0000000000402670 [ 47.192445] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000b6c7 [ 47.199713] R13: 0000000000402670 R14: 0000000000000000 R15: 0000000000000000 [ 47.207097] ? general_protection+0x8/0x30 [ 47.211444] ? general_protection+0x8/0x30 [ 47.215671] [ 47.219696] Dumping ftrace buffer: [ 47.223227] (ftrace buffer empty) [ 47.226921] Kernel Offset: disabled [ 47.230531] Rebooting in 86400 seconds..