[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.365753] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.198098] random: sshd: uninitialized urandom read (32 bytes read) [ 21.532746] random: sshd: uninitialized urandom read (32 bytes read) [ 22.184714] random: sshd: uninitialized urandom read (32 bytes read) [ 22.316944] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 27.732346] 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 [ 28.017444] kasan: CONFIG_KASAN_INLINE enabled [ 28.022078] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.029459] general protection fault: 0000 [#1] SMP KASAN [ 28.034981] CPU: 1 PID: 4460 Comm: syz-executor721 Not tainted 4.18.0-rc3+ #45 [ 28.042319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.051663] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 28.056480] 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 [ 28.075663] RSP: 0018:ffff8801ac91f7c8 EFLAGS: 00010292 [ 28.081012] RAX: dffffc0000000000 RBX: 0000000000000230 RCX: 0000000000000000 [ 28.088269] RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000234 [ 28.095520] RBP: ffff8801ac91f7f0 R08: 0000000000000001 R09: 0000000000000000 [ 28.102771] R10: ffffed00359710d6 R11: ffff8801acb886b3 R12: dffffc0000000000 [ 28.110028] R13: ffff8801d012ad40 R14: ffff8801cc17b818 R15: ffff8801cc17b800 [ 28.117283] FS: 00007ff94eb6f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 28.125489] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.131351] CR2: 00007fff421bfdcc CR3: 00000001b75f6000 CR4: 00000000001406e0 [ 28.138605] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.145859] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.153108] Call Trace: [ 28.155683] _raw_spin_lock_bh+0x39/0x40 [ 28.159731] ? smap_list_hash_remove+0xa3/0x470 [ 28.164385] smap_list_hash_remove+0xa3/0x470 [ 28.168866] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 28.173605] ? do_raw_spin_unlock+0xa7/0x2f0 [ 28.177995] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 28.182566] ? sock_hash_ctx_update_elem.isra.27+0xe5e/0x1690 [ 28.188437] ? trace_hardirqs_on+0xd/0x10 [ 28.192602] ? __local_bh_enable_ip+0x161/0x230 [ 28.197289] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 28.203072] ? sock_map_free+0x530/0x530 [ 28.207119] ? zap_class+0x740/0x740 [ 28.210816] ? save_stack+0xa9/0xd0 [ 28.214434] ? __fget+0x414/0x670 [ 28.217872] ? expand_files.part.8+0x9c0/0x9c0 [ 28.222442] ? lock_acquire+0x1e4/0x540 [ 28.226404] sock_hash_update_elem+0x157/0x2f0 [ 28.230982] ? bpf_sock_hash_update+0x90/0x90 [ 28.235463] ? lock_release+0xa30/0xa30 [ 28.239430] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.244951] ? bpf_sock_hash_update+0x90/0x90 [ 28.249428] map_update_elem+0x5c4/0xc90 [ 28.253475] __x64_sys_bpf+0x32d/0x510 [ 28.257345] ? bpf_prog_get+0x20/0x20 [ 28.261128] ? kasan_check_read+0x11/0x20 [ 28.265275] ? compat_start_thread+0x80/0x80 [ 28.269669] do_syscall_64+0x1b9/0x820 [ 28.273541] ? syscall_return_slowpath+0x5e0/0x5e0 [ 28.278453] ? syscall_return_slowpath+0x31d/0x5e0 [ 28.283364] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 28.288364] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.293190] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.298359] RIP: 0033:0x445829 [ 28.301527] 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 [ 28.320709] RSP: 002b:00007ff94eb6eda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 28.328415] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445829 [ 28.335667] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 28.342920] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 28.350170] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac38 [ 28.357422] R13: 32169ca079410e06 R14: 0b70e1a77ec468c3 R15: 0000000000000007 [ 28.364676] Modules linked in: [ 28.367854] Dumping ftrace buffer: [ 28.371371] (ftrace buffer empty) [ 28.375119] ---[ end trace 80d90163148e140c ]--- [ 28.379882] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 28.384722] 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 [ 28.403924] RSP: 0018:ffff8801ac91f7c8 EFLAGS: 00010292 [ 28.409281] RAX: dffffc0000000000 RBX: 0000000000000230 RCX: 0000000000000000 [ 28.416544] RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000234 [ 28.423807] RBP: ffff8801ac91f7f0 R08: 0000000000000001 R09: 0000000000000000 [ 28.431075] R10: ffffed00359710d6 R11: ffff8801acb886b3 R12: dffffc0000000000 [ 28.438351] R13: ffff8801d012ad40 R14: ffff8801cc17b818 R15: ffff8801cc17b800 [ 28.445617] FS: 00007ff94eb6f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 28.453835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.459708] CR2: 00007fff421bfdcc CR3: 00000001b75f6000 CR4: 00000000001406e0 [ 28.466972] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.474233] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.481495] Kernel panic - not syncing: Fatal exception in interrupt [ 28.488401] Dumping ftrace buffer: [ 28.491923] (ftrace buffer empty) [ 28.495608] Kernel Offset: disabled [ 28.499214] Rebooting in 86400 seconds..