[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.345874] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 202.454512] random: sshd: uninitialized urandom read (32 bytes read) [ 202.836520] random: sshd: uninitialized urandom read (32 bytes read) [ 203.431773] random: sshd: uninitialized urandom read (32 bytes read) [ 249.813739] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. [ 255.406948] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 255.626052] kasan: CONFIG_KASAN_INLINE enabled [ 255.630872] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 255.638349] general protection fault: 0000 [#1] SMP KASAN [ 255.643942] CPU: 0 PID: 4589 Comm: syz-executor175 Not tainted 4.18.0-rc5+ #153 [ 255.652435] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 255.661832] RIP: 0010:bpf_tcp_close+0x94c/0x1050 [ 255.666576] Code: 85 25 06 00 00 48 8d 95 18 ff ff ff 49 8b 4c 24 18 48 89 d6 48 c1 ee 03 c6 04 1e 00 48 89 ce 48 c1 ee 03 48 89 85 18 ff ff ff <80> 3c 1e 00 0f 85 bf 05 00 00 48 c1 ea 03 48 85 c0 48 89 01 48 89 [ 255.685911] RSP: 0018:ffff8801aec2f950 EFLAGS: 00010a02 [ 255.691261] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: dead000000000200 [ 255.698513] RDX: ffff8801aec2fa40 RSI: 1bd5a00000000040 RDI: ffff8801c7e07e90 [ 255.705768] RBP: ffff8801aec2fb28 R08: ffff8801d9bfe200 R09: ffffed0038fc0fc1 [ 255.713022] R10: ffffed0038fc0fc1 R11: ffff8801c7e07e0b R12: ffff8801c7e07e80 [ 255.720273] R13: ffff8801af1ec5c0 R14: ffff8801c7e07e08 R15: ffff8801c7e07e98 [ 255.727527] FS: 0000000002397880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 255.735746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 255.741612] CR2: 00007fd832918e78 CR3: 00000001af586000 CR4: 00000000001406f0 [ 255.748876] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 255.756128] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 255.763378] Call Trace: [ 255.766036] ? tcp_check_oom+0x530/0x530 [ 255.770086] ? sock_hash_free+0x6a0/0x6a0 [ 255.774231] ? lock_acquire+0x1e4/0x540 [ 255.778262] ? __sock_release+0x8b/0x260 [ 255.782312] ? lock_release+0xa30/0xa30 [ 255.786272] ? rcu_note_context_switch+0x730/0x730 [ 255.791211] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 255.796750] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 255.802346] ? ipv6_sock_ac_close+0x356/0x490 [ 255.806838] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 255.812815] ? ipv6_sock_mc_close+0x162/0x1d0 [ 255.817345] ? ip_mc_drop_socket+0x20f/0x270 [ 255.821748] ? down_write+0x8f/0x130 [ 255.825448] inet_release+0x104/0x1f0 [ 255.829247] inet6_release+0x50/0x70 [ 255.832959] __sock_release+0xd7/0x260 [ 255.836829] ? __sock_release+0x260/0x260 [ 255.840960] sock_close+0x19/0x20 [ 255.844407] __fput+0x355/0x8b0 [ 255.847680] ? fput+0x1a0/0x1a0 [ 255.850952] ? _raw_spin_unlock_irq+0x27/0x70 [ 255.855440] ____fput+0x15/0x20 [ 255.858710] task_work_run+0x1ec/0x2a0 [ 255.862596] ? task_work_cancel+0x250/0x250 [ 255.866903] ? exit_to_usermode_loop+0x8c/0x370 [ 255.871583] exit_to_usermode_loop+0x313/0x370 [ 255.876160] ? syscall_slow_exit_work+0x500/0x500 [ 255.880990] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 255.887592] do_syscall_64+0x6be/0x820 [ 255.891464] ? syscall_return_slowpath+0x5e0/0x5e0 [ 255.896384] ? syscall_return_slowpath+0x31d/0x5e0 [ 255.901300] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 255.906655] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 255.911498] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 255.916670] RIP: 0033:0x405ac1 [ 255.919841] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 54 17 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 255.938997] RSP: 002b:00007ffcb9475740 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 255.946699] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000405ac1 [ 255.953950] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004 [ 255.961637] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 255.968899] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000003e665 [ 255.976151] R13: 0000000000407710 R14: 0000000000000000 R15: 0000000000000000 [ 255.983409] Modules linked in: [ 255.986597] Dumping ftrace buffer: [ 255.990113] (ftrace buffer empty) [ 255.993854] ---[ end trace 603dc17a5577dcc4 ]--- [ 255.998625] RIP: 0010:bpf_tcp_close+0x94c/0x1050 [ 256.003391] Code: 85 25 06 00 00 48 8d 95 18 ff ff ff 49 8b 4c 24 18 48 89 d6 48 c1 ee 03 c6 04 1e 00 48 89 ce 48 c1 ee 03 48 89 85 18 ff ff ff <80> 3c 1e 00 0f 85 bf 05 00 00 48 c1 ea 03 48 85 c0 48 89 01 48 89 [ 256.022588] RSP: 0018:ffff8801aec2f950 EFLAGS: 00010a02 [ 256.028287] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: dead000000000200 [ 256.035577] RDX: ffff8801aec2fa40 RSI: 1bd5a00000000040 RDI: ffff8801c7e07e90 [ 256.043031] RBP: ffff8801aec2fb28 R08: ffff8801d9bfe200 R09: ffffed0038fc0fc1 [ 256.050321] R10: ffffed0038fc0fc1 R11: ffff8801c7e07e0b R12: ffff8801c7e07e80 [ 256.057597] R13: ffff8801af1ec5c0 R14: ffff8801c7e07e08 R15: ffff8801c7e07e98 [ 256.064883] FS: 0000000002397880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 256.073108] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 256.078997] CR2: 00007fd832918e78 CR3: 00000001af586000 CR4: 00000000001406f0 [ 256.086281] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 256.093568] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 256.100841] Kernel panic - not syncing: Fatal exception in interrupt [ 256.107774] Dumping ftrace buffer: [ 256.111295] (ftrace buffer empty) [ 256.114985] Kernel Offset: disabled [ 256.118604] Rebooting in 86400 seconds..