[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.850637] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.539333] random: sshd: uninitialized urandom read (32 bytes read) [ 20.938246] random: sshd: uninitialized urandom read (32 bytes read) [ 21.659557] random: sshd: uninitialized urandom read (32 bytes read) [ 108.687181] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. [ 114.113065] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 114.341146] kasan: CONFIG_KASAN_INLINE enabled [ 114.345905] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 114.353341] general protection fault: 0000 [#1] SMP KASAN [ 114.358910] CPU: 1 PID: 4467 Comm: syz-executor431 Not tainted 4.18.0-rc3-next-20180706+ #1 [ 114.367405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.376947] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 114.381786] Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 c1 ea 03 48 83 ec 08 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7b [ 114.401415] RSP: 0018:ffff8801acf8f7c8 EFLAGS: 00010292 [ 114.406812] RAX: dffffc0000000000 RBX: 0000000000000230 RCX: 0000000000000000 [ 114.414094] RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000234 [ 114.421373] RBP: ffff8801acf8f7f0 R08: 0000000000000001 R09: 0000000000000000 [ 114.428651] R10: ffffed003b36ac46 R11: ffff8801d9b56233 R12: dffffc0000000000 [ 114.435951] R13: ffff8801b9508080 R14: ffff8801c7639e18 R15: ffff8801c7639e00 [ 114.443246] FS: 00007f6ef1f4a700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 114.451502] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 114.457390] CR2: 00007ffca218eae0 CR3: 00000001bc769000 CR4: 00000000001406e0 [ 114.465130] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 114.472425] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 114.479697] Call Trace: [ 114.482318] _raw_spin_lock_bh+0x39/0x40 [ 114.486401] ? smap_list_hash_remove+0xa3/0x470 [ 114.491080] smap_list_hash_remove+0xa3/0x470 [ 114.495608] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 114.500389] ? do_raw_spin_unlock+0xa7/0x2f0 [ 114.504803] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 114.509421] ? sock_hash_ctx_update_elem.isra.27+0xe5e/0x1690 [ 114.515320] ? trace_hardirqs_on+0xd/0x10 [ 114.519568] ? __local_bh_enable_ip+0x161/0x230 [ 114.524244] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 114.530054] ? sock_map_free+0x530/0x530 [ 114.534228] ? __fget+0x4d5/0x740 [ 114.538249] ? ksys_dup3+0x690/0x690 [ 114.541979] ? trace_hardirqs_off+0xd/0x10 [ 114.546229] ? lock_acquire+0x1e4/0x540 [ 114.550210] ? fs_reclaim_acquire+0x20/0x20 [ 114.554540] ? lock_acquire+0x1e4/0x540 [ 114.558618] sock_hash_update_elem+0x157/0x2f0 [ 114.563230] ? bpf_sock_hash_update+0x90/0x90 [ 114.567733] ? lock_release+0xa30/0xa30 [ 114.571723] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 114.577292] ? bpf_sock_hash_update+0x90/0x90 [ 114.581806] map_update_elem+0x5c4/0xc90 [ 114.585885] __x64_sys_bpf+0x32d/0x510 [ 114.589777] ? bpf_prog_get+0x20/0x20 [ 114.593579] ? kasan_check_read+0x11/0x20 [ 114.597738] ? compat_start_thread+0x80/0x80 [ 114.602351] do_syscall_64+0x1b9/0x820 [ 114.606249] ? syscall_return_slowpath+0x5e0/0x5e0 [ 114.611184] ? syscall_return_slowpath+0x31d/0x5e0 [ 114.616422] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 114.621451] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 114.626302] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 114.631508] RIP: 0033:0x445d19 [ 114.634779] Code: e8 2c b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 114.657185] RSP: 002b:00007f6ef1f49ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 114.665085] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445d19 [ 114.672360] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 114.679636] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 114.686997] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 114.694268] R13: 00007fff522fcb7f R14: 00007f6ef1f4a9c0 R15: 0000000000000005 [ 114.701545] Modules linked in: [ 114.704781] Dumping ftrace buffer: [ 114.708320] (ftrace buffer empty) [ 114.712109] ---[ end trace 0c2f55a886126ba4 ]--- [ 114.716924] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 114.721783] Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 c1 ea 03 48 83 ec 08 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7b [ 114.742996] RSP: 0018:ffff8801acf8f7c8 EFLAGS: 00010292 [ 114.749115] RAX: dffffc0000000000 RBX: 0000000000000230 RCX: 0000000000000000 [ 114.758038] RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000234 [ 114.766360] RBP: ffff8801acf8f7f0 R08: 0000000000000001 R09: 0000000000000000 [ 114.773765] R10: ffffed003b36ac46 R11: ffff8801d9b56233 R12: dffffc0000000000 [ 114.781056] R13: ffff8801b9508080 R14: ffff8801c7639e18 R15: ffff8801c7639e00 [ 114.788615] FS: 00007f6ef1f4a700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 114.796875] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 114.802793] CR2: 00007ffca218eae0 CR3: 00000001bc769000 CR4: 00000000001406e0 [ 114.810100] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 114.817401] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 114.824684] Kernel panic - not syncing: Fatal exception in interrupt [ 114.831712] Dumping ftrace buffer: [ 114.835233] (ftrace buffer empty) [ 114.838938] Kernel Offset: disabled [ 114.842574] Rebooting in 86400 seconds..