[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.891369] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.889379] random: sshd: uninitialized urandom read (32 bytes read) [ 24.213585] random: sshd: uninitialized urandom read (32 bytes read) [ 25.070189] random: sshd: uninitialized urandom read (32 bytes read) [ 694.270221] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.0' (ECDSA) to the list of known hosts. [ 699.848048] 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 [ 700.071992] kasan: CONFIG_KASAN_INLINE enabled [ 700.076601] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 700.083991] general protection fault: 0000 [#1] SMP KASAN [ 700.089514] CPU: 0 PID: 4519 Comm: syz-executor605 Not tainted 4.18.0-rc4+ #142 [ 700.096938] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 700.106319] RIP: 0010:__lock_acquire+0x245/0x5020 [ 700.111135] 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 [ 700.130232] RSP: 0018:ffff8801bf73f340 EFLAGS: 00010002 [ 700.135571] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 700.142819] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 700.150067] RBP: ffff8801bf73f6d0 R08: 0000000000000001 R09: 0000000000000000 [ 700.157322] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 700.164767] R13: 0000000000000248 R14: ffff8801d9236580 R15: 0000000000000000 [ 700.172149] FS: 00007efe2ad7f700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 700.180375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 700.186236] CR2: 00007fffb785fcec CR3: 00000001af3d2000 CR4: 00000000001406f0 [ 700.194133] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 700.202255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 700.209502] Call Trace: [ 700.212079] ? print_usage_bug+0xc0/0xc0 [ 700.216138] ? trace_hardirqs_on+0x10/0x10 [ 700.220368] ? __lock_acquire+0x7fc/0x5020 [ 700.224587] ? lock_downgrade+0x8f0/0x8f0 [ 700.228715] ? trace_hardirqs_on+0x10/0x10 [ 700.232928] ? is_bpf_text_address+0xd7/0x170 [ 700.237400] ? kernel_text_address+0x79/0xf0 [ 700.241786] ? __kernel_text_address+0xd/0x40 [ 700.246270] ? unwind_get_return_address+0x61/0xa0 [ 700.251177] ? __save_stack_trace+0x8d/0xf0 [ 700.255479] ? save_stack+0xa9/0xd0 [ 700.259091] lock_acquire+0x1e4/0x540 [ 700.262884] ? smap_list_hash_remove+0xa3/0x470 [ 700.267546] ? lock_release+0xa30/0xa30 [ 700.271514] ? graph_lock+0x170/0x170 [ 700.275292] ? print_usage_bug+0xc0/0xc0 [ 700.279337] ? find_held_lock+0x36/0x1c0 [ 700.283443] _raw_spin_lock_bh+0x31/0x40 [ 700.287592] ? smap_list_hash_remove+0xa3/0x470 [ 700.292240] smap_list_hash_remove+0xa3/0x470 [ 700.296714] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 700.301447] ? __lock_is_held+0xb5/0x140 [ 700.305484] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 700.311267] ? sock_map_free+0x530/0x530 [ 700.315306] ? rcu_is_watching+0x8c/0x150 [ 700.319429] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 700.323817] ? __fget+0x414/0x670 [ 700.327248] ? expand_files.part.8+0x9c0/0x9c0 [ 700.331812] ? find_held_lock+0x36/0x1c0 [ 700.335876] sock_hash_update_elem+0x157/0x2f0 [ 700.340440] ? bpf_sock_hash_update+0x90/0x90 [ 700.344915] ? kasan_check_read+0x11/0x20 [ 700.349040] ? rcu_is_watching+0x8c/0x150 [ 700.353161] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 700.357552] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 700.363066] ? bpf_sock_hash_update+0x90/0x90 [ 700.367537] map_update_elem+0x5c4/0xc90 [ 700.371594] __x64_sys_bpf+0x32d/0x510 [ 700.375456] ? bpf_prog_get+0x20/0x20 [ 700.379236] ? do_syscall_64+0x9a/0x820 [ 700.383188] do_syscall_64+0x1b9/0x820 [ 700.387052] ? finish_task_switch+0x1d3/0x870 [ 700.391525] ? syscall_return_slowpath+0x5e0/0x5e0 [ 700.396440] ? syscall_return_slowpath+0x31d/0x5e0 [ 700.401351] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 700.406694] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 700.411514] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 700.416773] RIP: 0033:0x445689 [ 700.419936] 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 [ 700.439021] RSP: 002b:00007efe2ad7edb8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 700.446713] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445689 [ 700.453959] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 700.461205] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 700.468457] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 700.475721] R13: 00007ffdd9a34abf R14: 00007efe2ad7f9c0 R15: 0000000000000005 [ 700.482968] Modules linked in: [ 700.486142] Dumping ftrace buffer: [ 700.489656] (ftrace buffer empty) [ 700.493350] ---[ end trace 43c9d7ff2387073c ]--- [ 700.498110] RIP: 0010:__lock_acquire+0x245/0x5020 [ 700.502922] 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 [ 700.522025] RSP: 0018:ffff8801bf73f340 EFLAGS: 00010002 [ 700.527374] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 700.534632] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 700.541975] RBP: ffff8801bf73f6d0 R08: 0000000000000001 R09: 0000000000000000 [ 700.549221] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 700.556467] R13: 0000000000000248 R14: ffff8801d9236580 R15: 0000000000000000 [ 700.563732] FS: 00007efe2ad7f700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 700.571975] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 700.577847] CR2: 00007fffb785fcec CR3: 00000001af3d2000 CR4: 00000000001406f0 [ 700.585097] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 700.592429] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 700.599678] Kernel panic - not syncing: Fatal exception in interrupt [ 700.606622] Dumping ftrace buffer: [ 700.610139] (ftrace buffer empty) [ 700.613899] Kernel Offset: disabled [ 700.617504] Rebooting in 86400 seconds..