[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.487455] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.725805] random: sshd: uninitialized urandom read (32 bytes read) [ 20.983717] random: sshd: uninitialized urandom read (32 bytes read) [ 21.718341] random: sshd: uninitialized urandom read (32 bytes read) [ 44.239540] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. [ 49.923240] 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 [ 50.080565] kasan: CONFIG_KASAN_INLINE enabled [ 50.085191] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.092604] general protection fault: 0000 [#1] SMP KASAN [ 50.098137] CPU: 1 PID: 4449 Comm: syz-executor619 Not tainted 4.18.0-rc3+ #51 [ 50.105492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.114839] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 50.119654] 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 [ 50.138793] RSP: 0018:ffff8801b5dc77c8 EFLAGS: 00010292 [ 50.144148] RAX: dffffc0000000000 RBX: 0000000000000230 RCX: 0000000000000000 [ 50.151399] RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000234 [ 50.158651] RBP: ffff8801b5dc77f0 R08: 0000000000000001 R09: 0000000000000000 [ 50.165902] R10: ffffed00356abba6 R11: ffff8801ab55dd33 R12: dffffc0000000000 [ 50.173242] R13: ffff8801bc35bd40 R14: ffff8801ccfe2998 R15: ffff8801ccfe2980 [ 50.180504] FS: 00007f139109f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 50.188722] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.194594] CR2: 00007ffec718fd10 CR3: 00000001cfa48000 CR4: 00000000001406e0 [ 50.201934] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.209185] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.216445] Call Trace: [ 50.219017] _raw_spin_lock_bh+0x39/0x40 [ 50.223062] ? smap_list_hash_remove+0xa3/0x470 [ 50.227711] smap_list_hash_remove+0xa3/0x470 [ 50.232200] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 50.236938] ? do_raw_spin_unlock+0xa7/0x2f0 [ 50.241341] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 50.245907] ? sock_hash_ctx_update_elem.isra.27+0xe5e/0x1690 [ 50.251801] ? trace_hardirqs_on+0xd/0x10 [ 50.255933] ? __local_bh_enable_ip+0x161/0x230 [ 50.260583] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 50.266626] ? sock_map_free+0x530/0x530 [ 50.270672] ? save_stack+0xa9/0xd0 [ 50.274552] ? __fget+0x414/0x670 [ 50.277989] ? expand_files.part.8+0x9c0/0x9c0 [ 50.282565] ? lock_acquire+0x1e4/0x540 [ 50.286884] ? fs_reclaim_acquire+0x20/0x20 [ 50.291187] ? lock_acquire+0x1e4/0x540 [ 50.295148] sock_hash_update_elem+0x157/0x2f0 [ 50.299724] ? bpf_sock_hash_update+0x90/0x90 [ 50.304218] ? lock_release+0xa30/0xa30 [ 50.308178] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.313696] ? bpf_sock_hash_update+0x90/0x90 [ 50.318168] map_update_elem+0x5c4/0xc90 [ 50.322213] __x64_sys_bpf+0x32d/0x510 [ 50.326081] ? bpf_prog_get+0x20/0x20 [ 50.329873] do_syscall_64+0x1b9/0x820 [ 50.333746] ? finish_task_switch+0x1d3/0x890 [ 50.338221] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.343146] ? syscall_return_slowpath+0x31d/0x5e0 [ 50.348082] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.353082] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.357911] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.363089] RIP: 0033:0x445689 [ 50.366260] Code: e8 3c b6 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 [ 50.385463] RSP: 002b:00007f139109edb8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 50.393154] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445689 [ 50.400417] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 50.407668] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 50.414919] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 50.422177] R13: 00007ffd9d0b5b1f R14: 00007f139109f9c0 R15: 0000000000000005 [ 50.429428] Modules linked in: [ 50.432604] Dumping ftrace buffer: [ 50.436131] (ftrace buffer empty) [ 50.439861] ---[ end trace 278c4171e6dfcc79 ]--- [ 50.444797] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 50.449634] 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 [ 50.468796] RSP: 0018:ffff8801b5dc77c8 EFLAGS: 00010292 [ 50.474178] RAX: dffffc0000000000 RBX: 0000000000000230 RCX: 0000000000000000 [ 50.481452] RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000234 [ 50.488722] RBP: ffff8801b5dc77f0 R08: 0000000000000001 R09: 0000000000000000 [ 50.496095] R10: ffffed00356abba6 R11: ffff8801ab55dd33 R12: dffffc0000000000 [ 50.503370] R13: ffff8801bc35bd40 R14: ffff8801ccfe2998 R15: ffff8801ccfe2980 [ 50.510654] FS: 00007f139109f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 50.518884] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.524787] CR2: 00007ffec718fd10 CR3: 00000001cfa48000 CR4: 00000000001406e0 [ 50.532069] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.539341] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.546626] Kernel panic - not syncing: Fatal exception in interrupt [ 50.553485] Dumping ftrace buffer: [ 50.557001] (ftrace buffer empty) [ 50.560699] Kernel Offset: disabled [ 50.564310] Rebooting in 86400 seconds..