[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.691725] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.377465] random: sshd: uninitialized urandom read (32 bytes read) [ 24.635129] random: sshd: uninitialized urandom read (32 bytes read) [ 25.349792] random: sshd: uninitialized urandom read (32 bytes read) [ 25.498433] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.34' (ECDSA) to the list of known hosts. [ 30.942346] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/04 01:18:22 parsed 1 programs 2018/05/04 01:18:22 executed programs: 0 [ 31.383583] IPVS: ftp: loaded support on port[0] = 21 [ 31.425981] WARNING: CPU: 0 PID: 4499 at sound/core/pcm_lib.c:2057 __snd_pcm_lib_xfer+0x7c3/0x1d10 [ 31.435111] Kernel panic - not syncing: panic_on_warn set ... [ 31.435111] [ 31.442458] CPU: 0 PID: 4499 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #56 [ 31.449621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.458949] Call Trace: [ 31.461521] dump_stack+0x1b9/0x294 [ 31.465128] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.470298] ? __snd_pcm_lib_xfer+0x7b0/0x1d10 [ 31.474863] panic+0x22f/0x4de [ 31.478033] ? add_taint.cold.5+0x16/0x16 [ 31.482161] ? __warn.cold.8+0x148/0x1b3 [ 31.486200] ? __warn.cold.8+0x117/0x1b3 [ 31.490251] ? __snd_pcm_lib_xfer+0x7c3/0x1d10 [ 31.494812] __warn.cold.8+0x163/0x1b3 [ 31.498678] ? __snd_pcm_lib_xfer+0x7c3/0x1d10 [ 31.503237] report_bug+0x252/0x2d0 [ 31.506843] do_error_trap+0x1de/0x490 [ 31.510707] ? math_error+0x420/0x420 [ 31.514489] ? debug_check_no_locks_freed+0x310/0x310 [ 31.519670] ? get_futex_key+0x1e90/0x1e90 [ 31.523885] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.528709] do_invalid_op+0x1b/0x20 [ 31.532400] invalid_op+0x14/0x20 [ 31.535834] RIP: 0010:__snd_pcm_lib_xfer+0x7c3/0x1d10 [ 31.541010] RSP: 0018:ffff8801adf8f898 EFLAGS: 00010293 [ 31.546352] RAX: ffff8801af70e080 RBX: ffff8801b1d6eb40 RCX: 000000006d63702f [ 31.553608] RDX: 0000000000000000 RSI: ffffffff85c3d513 RDI: ffff8801b1d6ee58 [ 31.560855] RBP: ffff8801adf8fb38 R08: 0000000000000000 R09: 0000000000000000 [ 31.568102] R10: 0000000000000003 R11: 0000000000000000 R12: ffffffff884949c0 [ 31.575360] R13: 0000000000000000 R14: ffff8801b1d6eb40 R15: ffff8801cdd33b00 [ 31.582619] ? __snd_pcm_lib_xfer+0x7c3/0x1d10 [ 31.587183] ? __snd_pcm_lib_xfer+0x7c3/0x1d10 [ 31.591744] ? graph_lock+0x170/0x170 [ 31.595525] ? exit_robust_list+0x290/0x290 [ 31.599829] ? pcm_lib_apply_appl_ptr+0x5a0/0x5a0 [ 31.604660] ? find_held_lock+0x36/0x1c0 [ 31.608704] ? lock_downgrade+0x8e0/0x8e0 [ 31.612830] ? lock_release+0xa10/0xa10 [ 31.616784] ? check_same_owner+0x320/0x320 [ 31.621090] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 31.625822] ? graph_lock+0x170/0x170 [ 31.629603] ? __kmalloc+0x25/0x760 [ 31.633210] ? __might_sleep+0x95/0x190 [ 31.637168] ? snd_pcm_ioctl_xfern_compat+0x180/0x330 [ 31.642339] snd_pcm_ioctl_xfern_compat+0x266/0x330 [ 31.647334] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 31.652503] snd_pcm_ioctl_compat+0xc96/0x1c90 [ 31.657067] ? snd_pcm_status_user_x32+0x710/0x710 [ 31.661978] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.667506] ? __fget_light+0x2ef/0x430 [ 31.671458] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 31.676974] ? fget_raw+0x20/0x20 [ 31.680407] ? __handle_mm_fault+0x4310/0x4310 [ 31.684970] ? __ia32_compat_sys_futex+0x3de/0x5e0 [ 31.689882] ? __x32_compat_sys_get_robust_list+0x430/0x430 [ 31.695574] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 31.700743] ? snd_pcm_status_user_x32+0x710/0x710 [ 31.705664] __ia32_compat_sys_ioctl+0x221/0x640 [ 31.710404] do_fast_syscall_32+0x345/0xf9b [ 31.714709] ? do_int80_syscall_32+0x880/0x880 [ 31.719270] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 31.724097] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.729617] ? syscall_return_slowpath+0x30f/0x5c0 [ 31.734528] ? sysret32_from_system_call+0x5/0x46 [ 31.739362] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.744183] entry_SYSENTER_compat+0x70/0x7f [ 31.748568] RIP: 0023:0xf7fa1cb9 [ 31.751910] RSP: 002b:00000000ff8aaf3c EFLAGS: 00000282 ORIG_RAX: 0000000000000036 [ 31.759599] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000800c4153 [ 31.766848] RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000000 [ 31.774093] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.781342] R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 [ 31.788589] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.796358] Dumping ftrace buffer: [ 31.799947] (ftrace buffer empty) [ 31.803636] Kernel Offset: disabled [ 31.807257] Rebooting in 86400 seconds..