[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.849345] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.832592] random: sshd: uninitialized urandom read (32 bytes read) [ 24.238802] random: sshd: uninitialized urandom read (32 bytes read) [ 25.100164] random: sshd: uninitialized urandom read (32 bytes read) [ 97.379140] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. [ 102.872540] 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 [ 103.078421] kasan: CONFIG_KASAN_INLINE enabled [ 103.083040] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 103.090398] general protection fault: 0000 [#1] SMP KASAN [ 103.095922] CPU: 0 PID: 4580 Comm: syz-executor837 Not tainted 4.18.0-rc4+ #145 [ 103.103359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.113153] RIP: 0010:__lock_acquire+0x245/0x5020 [ 103.117978] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 86 e7 89 0f 84 42 ff [ 103.137084] RSP: 0018:ffff8801ac14f340 EFLAGS: 00010002 [ 103.143750] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 103.151011] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 103.158279] RBP: ffff8801ac14f6d0 R08: 0000000000000001 R09: 0000000000000000 [ 103.165564] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 103.172900] R13: 0000000000000248 R14: ffff8801ae3c0380 R15: 0000000000000000 [ 103.180274] FS: 00007f6ff092b700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 103.189781] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.195643] CR2: 00007ffc05005e2c CR3: 00000001d96a8000 CR4: 00000000001406f0 [ 103.202955] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.210393] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.217645] Call Trace: [ 103.220318] ? print_usage_bug+0xc0/0xc0 [ 103.224377] ? trace_hardirqs_on+0x10/0x10 [ 103.228860] ? __lock_acquire+0x7fc/0x5020 [ 103.233095] ? lock_downgrade+0x8f0/0x8f0 [ 103.237326] ? trace_hardirqs_on+0x10/0x10 [ 103.241551] ? is_bpf_text_address+0xd7/0x170 [ 103.246038] ? kernel_text_address+0x79/0xf0 [ 103.250530] ? __kernel_text_address+0xd/0x40 [ 103.255015] ? unwind_get_return_address+0x61/0xa0 [ 103.260012] ? __save_stack_trace+0x8d/0xf0 [ 103.264403] ? save_stack+0xa9/0xd0 [ 103.268096] lock_acquire+0x1e4/0x540 [ 103.271975] ? smap_list_hash_remove+0xa3/0x470 [ 103.276625] ? lock_release+0xa30/0xa30 [ 103.280677] ? graph_lock+0x170/0x170 [ 103.284472] ? print_usage_bug+0xc0/0xc0 [ 103.288538] ? find_held_lock+0x36/0x1c0 [ 103.292600] _raw_spin_lock_bh+0x31/0x40 [ 103.296751] ? smap_list_hash_remove+0xa3/0x470 [ 103.301544] smap_list_hash_remove+0xa3/0x470 [ 103.306294] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 103.311119] ? __lock_is_held+0xb5/0x140 [ 103.315318] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 103.321182] ? sock_map_free+0x530/0x530 [ 103.325310] ? rcu_is_watching+0x8c/0x150 [ 103.329539] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 103.333950] ? __fget+0x414/0x670 [ 103.337474] ? expand_files.part.8+0x9c0/0x9c0 [ 103.342036] ? find_held_lock+0x36/0x1c0 [ 103.346091] sock_hash_update_elem+0x157/0x2f0 [ 103.350661] ? bpf_sock_hash_update+0x90/0x90 [ 103.355253] ? kasan_check_read+0x11/0x20 [ 103.359398] ? rcu_is_watching+0x8c/0x150 [ 103.363623] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 103.368098] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 103.373743] ? bpf_sock_hash_update+0x90/0x90 [ 103.378340] map_update_elem+0x5c4/0xc90 [ 103.382379] __x64_sys_bpf+0x32d/0x510 [ 103.386256] ? bpf_prog_get+0x20/0x20 [ 103.390053] ? do_syscall_64+0x9a/0x820 [ 103.394011] do_syscall_64+0x1b9/0x820 [ 103.397877] ? finish_task_switch+0x1d3/0x870 [ 103.402373] ? syscall_return_slowpath+0x5e0/0x5e0 [ 103.407394] ? syscall_return_slowpath+0x31d/0x5e0 [ 103.412576] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 103.418198] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 103.423021] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.428207] RIP: 0033:0x445d19 [ 103.431375] 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 [ 103.450655] RSP: 002b:00007f6ff092ace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 103.458445] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445d19 [ 103.465708] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 103.472968] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 103.480425] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 103.487695] R13: 00007fff7b5c144f R14: 00007f6ff092b9c0 R15: 0000000000000005 [ 103.494946] Modules linked in: [ 103.498124] Dumping ftrace buffer: [ 103.501657] (ftrace buffer empty) [ 103.505352] ---[ end trace 98400d73c680c6b4 ]--- [ 103.510107] RIP: 0010:__lock_acquire+0x245/0x5020 [ 103.514923] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 86 e7 89 0f 84 42 ff [ 103.534504] RSP: 0018:ffff8801ac14f340 EFLAGS: 00010002 [ 103.539860] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 103.547125] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 103.554377] RBP: ffff8801ac14f6d0 R08: 0000000000000001 R09: 0000000000000000 [ 103.561849] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 103.569115] R13: 0000000000000248 R14: ffff8801ae3c0380 R15: 0000000000000000 [ 103.576476] FS: 00007f6ff092b700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 103.584697] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.590559] CR2: 00007ffc05005e2c CR3: 00000001d96a8000 CR4: 00000000001406f0 [ 103.597998] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.605249] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.612503] Kernel panic - not syncing: Fatal exception in interrupt [ 103.619431] Dumping ftrace buffer: [ 103.622952] (ftrace buffer empty) [ 103.626651] Kernel Offset: disabled [ 103.630261] Rebooting in 86400 seconds..