[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.778149] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.257896] random: sshd: uninitialized urandom read (32 bytes read) [ 19.545070] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.259829] random: sshd: uninitialized urandom read (32 bytes read) [ 20.417654] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. [ 25.960537] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.051905] kasan: CONFIG_KASAN_INLINE enabled [ 26.056611] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.064008] general protection fault: 0000 [#1] SMP KASAN [ 26.069543] Dumping ftrace buffer: [ 26.073058] (ftrace buffer empty) [ 26.076764] Modules linked in: [ 26.079938] CPU: 0 PID: 4478 Comm: syz-executor993 Not tainted 4.17.0-rc2+ #48 [ 26.087273] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.096614] RIP: 0010:smc_getsockopt+0x8b/0x120 [ 26.101271] RSP: 0018:ffff8801af4efc28 EFLAGS: 00010206 [ 26.106612] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000008 [ 26.113856] RDX: 0000000000000005 RSI: ffffffff873e72c6 RDI: 0000000000000028 [ 26.121107] RBP: ffff8801af4efc58 R08: 0000000020000000 R09: ffffed003b5c46c2 [ 26.128357] R10: 0000000000000003 R11: 0000000000000000 R12: 1ffff10035e9df92 [ 26.135602] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 [ 26.142849] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:0000000008216840 [ 26.151051] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.156907] CR2: 0000000020000040 CR3: 00000001af6b6000 CR4: 00000000001406f0 [ 26.164156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.171401] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.178646] Call Trace: [ 26.181215] __compat_sys_getsockopt+0x32e/0x7f0 [ 26.185950] ? __compat_sys_recvmmsg+0x160/0x160 [ 26.190688] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.196212] ? __do_page_fault+0x441/0xe40 [ 26.200432] ? mm_fault_error+0x380/0x380 [ 26.204659] __ia32_compat_sys_getsockopt+0xbd/0x150 [ 26.209742] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.214741] do_fast_syscall_32+0x345/0xf9b [ 26.219042] ? do_int80_syscall_32+0x880/0x880 [ 26.223601] ? do_syscall_64+0x48f/0x800 [ 26.227640] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 26.232460] ? syscall_return_slowpath+0x5c0/0x5c0 [ 26.237367] ? syscall_return_slowpath+0x30f/0x5c0 [ 26.242290] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.247804] ? retint_user+0x18/0x18 [ 26.251495] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.256332] entry_SYSENTER_compat+0x70/0x7f [ 26.260715] RIP: 0023:0xf7f17cb9 [ 26.264052] RSP: 002b:00000000fffec56c EFLAGS: 00000286 ORIG_RAX: 000000000000016d [ 26.271735] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 26.278981] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000000 [ 26.286228] RBP: 0000000020000040 R08: 0000000000000000 R09: 0000000000000000 [ 26.293474] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.300719] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.307963] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 93 00 00 00 48 8b 9b 50 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 62 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 28 49 [ 26.327117] RIP: smc_getsockopt+0x8b/0x120 RSP: ffff8801af4efc28 [ 26.333522] ---[ end trace 13689f06e4e5ff1c ]--- [ 26.338292] Kernel panic - not syncing: Fatal exception [ 26.343708] Dumping ftrace buffer: [ 26.347231] (ftrace buffer empty) [ 26.350925] Kernel Offset: disabled [ 26.354534] Rebooting in 86400 seconds..