[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.932450] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.934227] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.277983] random: sshd: uninitialized urandom read (32 bytes read) [ 22.102954] random: sshd: uninitialized urandom read (32 bytes read) [ 599.383194] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts. [ 604.893234] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 607.451774] kasan: CONFIG_KASAN_INLINE enabled [ 607.456395] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 607.467549] general protection fault: 0000 [#1] SMP KASAN [ 607.473327] CPU: 0 PID: 4581 Comm: syz-executor885 Not tainted 4.18.0-rc4+ #144 [ 607.481640] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 607.491439] RIP: 0010:__lock_acquire+0x245/0x5020 [ 607.496268] 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 [ 607.516191] RSP: 0018:ffff8801d8e47340 EFLAGS: 00010002 [ 607.521536] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 607.528801] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 607.536046] RBP: ffff8801d8e476d0 R08: 0000000000000001 R09: 0000000000000000 [ 607.543299] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 607.550549] R13: 0000000000000248 R14: ffff8801ae3ce200 R15: 0000000000000000 [ 607.557805] FS: 00007f77af3ca700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 607.566018] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 607.571887] CR2: ffffffffff600400 CR3: 00000001d8893000 CR4: 00000000001406f0 [ 607.579136] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 607.586387] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 607.593634] Call Trace: [ 607.596207] ? print_usage_bug+0xc0/0xc0 [ 607.600252] ? trace_hardirqs_on+0x10/0x10 [ 607.604470] ? __lock_acquire+0x7fc/0x5020 [ 607.608680] ? lock_downgrade+0x8f0/0x8f0 [ 607.612807] ? trace_hardirqs_on+0x10/0x10 [ 607.617111] ? is_bpf_text_address+0xd7/0x170 [ 607.621633] ? kernel_text_address+0x79/0xf0 [ 607.626122] ? __kernel_text_address+0xd/0x40 [ 607.630622] ? unwind_get_return_address+0x61/0xa0 [ 607.635539] ? __save_stack_trace+0x8d/0xf0 [ 607.639889] ? save_stack+0xa9/0xd0 [ 607.643525] lock_acquire+0x1e4/0x540 [ 607.647334] ? smap_list_hash_remove+0xa3/0x470 [ 607.651992] ? lock_release+0xa30/0xa30 [ 607.655957] ? graph_lock+0x170/0x170 [ 607.659751] ? print_usage_bug+0xc0/0xc0 [ 607.663791] ? find_held_lock+0x36/0x1c0 [ 607.667909] _raw_spin_lock_bh+0x31/0x40 [ 607.671955] ? smap_list_hash_remove+0xa3/0x470 [ 607.676602] smap_list_hash_remove+0xa3/0x470 [ 607.681077] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 607.685811] ? __lock_is_held+0xb5/0x140 [ 607.689852] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 607.695642] ? sock_map_free+0x530/0x530 [ 607.699723] ? rcu_is_watching+0x8c/0x150 [ 607.703848] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 607.708280] ? __fget+0x414/0x670 [ 607.711726] ? expand_files.part.8+0x9c0/0x9c0 [ 607.716300] ? find_held_lock+0x36/0x1c0 [ 607.720430] sock_hash_update_elem+0x157/0x2f0 [ 607.724990] ? bpf_sock_hash_update+0x90/0x90 [ 607.729471] ? kasan_check_read+0x11/0x20 [ 607.733606] ? rcu_is_watching+0x8c/0x150 [ 607.737729] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 607.742169] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 607.747684] ? bpf_sock_hash_update+0x90/0x90 [ 607.752165] map_update_elem+0x5c4/0xc90 [ 607.756221] __x64_sys_bpf+0x32d/0x510 [ 607.760085] ? bpf_prog_get+0x20/0x20 [ 607.763864] ? ksys_ioctl+0x81/0xd0 [ 607.767518] ? do_syscall_64+0x9a/0x820 [ 607.771472] do_syscall_64+0x1b9/0x820 [ 607.775394] ? finish_task_switch+0x1d3/0x870 [ 607.779888] ? syscall_return_slowpath+0x5e0/0x5e0 [ 607.784795] ? syscall_return_slowpath+0x31d/0x5e0 [ 607.789706] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 607.795047] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 607.799870] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 607.805041] RIP: 0033:0x445a19 [ 607.808202] Code: e8 8c be 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 3b 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 607.827289] RSP: 002b:00007f77af3c9db8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 607.834974] RAX: ffffffffffffffda RBX: 00000000006dbc44 RCX: 0000000000445a19 [ 607.842240] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 607.849485] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 607.856730] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 607.863977] R13: 00007ffff088a2cf R14: 00007f77af3ca9c0 R15: 0000000000000009 [ 607.871245] Modules linked in: [ 607.874443] Dumping ftrace buffer: [ 607.877957] (ftrace buffer empty) [ 607.881652] ---[ end trace 5c01441eddc52bce ]--- [ 607.886392] RIP: 0010:__lock_acquire+0x245/0x5020 [ 607.891206] 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 [ 607.910399] RSP: 0018:ffff8801d8e47340 EFLAGS: 00010002 [ 607.915751] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 607.923001] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 607.930247] RBP: ffff8801d8e476d0 R08: 0000000000000001 R09: 0000000000000000 [ 607.937493] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 607.944749] R13: 0000000000000248 R14: ffff8801ae3ce200 R15: 0000000000000000 [ 607.951998] FS: 00007f77af3ca700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 607.960220] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 607.966080] CR2: ffffffffff600400 CR3: 00000001d8893000 CR4: 00000000001406f0 [ 607.973340] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 607.980602] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 607.987860] Kernel panic - not syncing: Fatal exception in interrupt [ 607.995270] Dumping ftrace buffer: [ 607.999330] (ftrace buffer empty) [ 608.003019] Kernel Offset: disabled [ 608.006620] Rebooting in 86400 seconds..