[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.716189] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.446050] random: sshd: uninitialized urandom read (32 bytes read) [ 19.737738] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.545602] random: sshd: uninitialized urandom read (32 bytes read) [ 20.706720] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts. [ 26.165862] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.255790] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 26.263774] PGD 1b4591067 P4D 1b4591067 PUD 1b3e1b067 PMD 0 [ 26.269560] Oops: 0010 [#1] SMP KASAN [ 26.273351] CPU: 1 PID: 4492 Comm: syz-executor213 Not tainted 4.17.0+ #92 [ 26.280360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.289694] RIP: 0010: (null) [ 26.293556] Code: Bad RIP value. [ 26.296907] RSP: 0018:ffff8801c8a2f590 EFLAGS: 00010246 [ 26.302492] RAX: 0000000000000000 RBX: ffff8801b2822800 RCX: 1ffffffff10ea8e5 [ 26.309747] RDX: ffff8801c8a2fab0 RSI: ffff8801ace95040 RDI: ffff8801b2d86780 [ 26.316995] RBP: ffff8801c8a2f700 R08: 0000000000000001 R09: 0000000000000000 [ 26.324256] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10039145eb7 [ 26.331503] R13: ffff8801c8a2fab0 R14: ffff8801b2822812 R15: ffff8801b2822c58 [ 26.338752] FS: 000000000107b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 26.346956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.352814] CR2: ffffffffffffffd6 CR3: 00000001b6df5000 CR4: 00000000001406e0 [ 26.360075] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.367321] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.374564] Call Trace: [ 26.377133] ? smc_poll+0x211/0xdd0 [ 26.380743] ? find_held_lock+0x36/0x1c0 [ 26.384787] ? __smc_connect+0xa90/0xa90 [ 26.388829] ? kvm_clock_read+0x25/0x30 [ 26.392792] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 26.398309] ? ktime_get_ts64+0x39d/0x510 [ 26.402435] ? do_gettimeofday+0x170/0x170 [ 26.406651] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.412175] ? __fget_light+0x2ef/0x430 [ 26.416130] sock_poll+0x1d1/0x710 [ 26.419648] ? __smc_connect+0xa90/0xa90 [ 26.423688] ? sock_get_poll_head+0x460/0x460 [ 26.428174] ? sock_get_poll_head+0x460/0x460 [ 26.432649] vfs_poll+0x77/0x2a0 [ 26.435997] do_sys_poll+0x6fd/0x1100 [ 26.439786] ? compat_core_sys_select+0xae0/0xae0 [ 26.444616] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.449613] ? graph_lock+0x170/0x170 [ 26.453393] ? graph_lock+0x170/0x170 [ 26.457180] ? poll_initwait+0x180/0x180 [ 26.461234] ? pvclock_read_flags+0x160/0x160 [ 26.465710] ? ktime_get_ts64+0x405/0x510 [ 26.469839] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 26.474834] ? timespec64_add_safe+0x1f4/0x2d0 [ 26.479405] ? nsec_to_clock_t+0x30/0x30 [ 26.483445] ? do_gettimeofday+0x170/0x170 [ 26.487668] ? poll_select_set_timeout+0x14f/0x220 [ 26.492577] ? do_restart_poll+0x2d0/0x2d0 [ 26.496803] __x64_sys_poll+0x189/0x510 [ 26.500755] ? __ia32_sys_pselect6+0x270/0x270 [ 26.505330] ? do_syscall_64+0x92/0x800 [ 26.509285] do_syscall_64+0x1b1/0x800 [ 26.513150] ? syscall_return_slowpath+0x5c0/0x5c0 [ 26.518058] ? syscall_return_slowpath+0x30f/0x5c0 [ 26.522977] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.528491] ? retint_user+0x18/0x18 [ 26.532184] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.537010] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.542193] RIP: 0033:0x43fcc9 [ 26.545366] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 6b 45 00 00 c3 66 2e 0f 1f 84 00 00 00 00 [ 26.564493] RSP: 002b:00007ffc8c918b88 EFLAGS: 00000213 ORIG_RAX: 0000000000000007 [ 26.572179] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcc9 [ 26.579424] RDX: 0000000000000003 RSI: 2000000000000112 RDI: 0000000020000040 [ 26.586670] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 26.593917] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004015f0 [ 26.601162] R13: 0000000000401680 R14: 0000000000000000 R15: 0000000000000000 [ 26.608407] Modules linked in: [ 26.611581] Dumping ftrace buffer: [ 26.615095] (ftrace buffer empty) [ 26.618782] CR2: 0000000000000000 [ 26.622294] ---[ end trace 42693cb1f5bd525b ]--- [ 26.627054] RIP: 0010: (null) [ 26.630932] Code: Bad RIP value. [ 26.634305] RSP: 0018:ffff8801c8a2f590 EFLAGS: 00010246 [ 26.639673] RAX: 0000000000000000 RBX: ffff8801b2822800 RCX: 1ffffffff10ea8e5 [ 26.646941] RDX: ffff8801c8a2fab0 RSI: ffff8801ace95040 RDI: ffff8801b2d86780 [ 26.654216] RBP: ffff8801c8a2f700 R08: 0000000000000001 R09: 0000000000000000 [ 26.661483] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10039145eb7 [ 26.668753] R13: ffff8801c8a2fab0 R14: ffff8801b2822812 R15: ffff8801b2822c58 [ 26.676052] FS: 000000000107b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 26.684283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.690165] CR2: ffffffffffffffd6 CR3: 00000001b6df5000 CR4: 00000000001406e0 [ 26.697438] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.704710] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.711975] Kernel panic - not syncing: Fatal exception [ 26.717781] Dumping ftrace buffer: [ 26.721300] (ftrace buffer empty) [ 26.724998] Kernel Offset: disabled [ 26.728600] Rebooting in 86400 seconds..