[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.425068] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.268978] random: sshd: uninitialized urandom read (32 bytes read) [ 23.689935] random: sshd: uninitialized urandom read (32 bytes read) [ 24.485650] random: sshd: uninitialized urandom read (32 bytes read) [ 24.641543] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. [ 30.080243] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.176515] FAULT_INJECTION: forcing a failure. [ 30.176515] name failslab, interval 1, probability 0, space 0, times 1 [ 30.187891] CPU: 0 PID: 4515 Comm: syz-executor342 Not tainted 4.17.0+ #84 [ 30.194901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.204239] Call Trace: [ 30.206819] dump_stack+0x1b9/0x294 [ 30.210437] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.215620] ? perf_swevent_event+0x2e0/0x2e0 [ 30.220120] should_fail.cold.4+0xa/0x1a [ 30.224172] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 30.229269] ? graph_lock+0x170/0x170 [ 30.233057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.238604] ? find_held_lock+0x36/0x1c0 [ 30.242659] ? __lock_is_held+0xb5/0x140 [ 30.246723] ? check_same_owner+0x320/0x320 [ 30.251045] ? rcu_note_context_switch+0x710/0x710 [ 30.255977] __should_failslab+0x124/0x180 [ 30.260206] should_failslab+0x9/0x14 [ 30.263991] kmem_cache_alloc+0x2af/0x760 [ 30.268128] ? perf_tp_event+0xc30/0xc30 [ 30.272176] ? perf_swevent_event+0x2e0/0x2e0 [ 30.276668] __d_alloc+0xc0/0xd30 [ 30.280129] ? shrink_dcache_for_umount+0x290/0x290 [ 30.285134] ? perf_trace_lock_acquire+0x4f1/0x980 [ 30.290059] ? perf_trace_lock+0x900/0x900 [ 30.294805] ? graph_lock+0x170/0x170 [ 30.298598] ? memset+0x31/0x40 [ 30.301866] d_alloc+0x8e/0x370 [ 30.305151] ? __d_alloc+0xd30/0xd30 [ 30.308894] d_alloc_parallel+0x152/0x1e70 [ 30.313156] ? rcu_report_qs_rnp+0x790/0x790 [ 30.317596] ? __d_lookup_rcu+0xa80/0xa80 [ 30.321730] ? print_usage_bug+0xc0/0xc0 [ 30.325777] ? __d_lookup+0x5b4/0x9c0 [ 30.329573] ? d_alloc_parallel+0x1e70/0x1e70 [ 30.334059] ? mark_held_locks+0xc9/0x160 [ 30.338197] ? __raw_spin_lock_init+0x1c/0x100 [ 30.342765] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.347767] ? __lockdep_init_map+0x105/0x590 [ 30.352249] ? __lockdep_init_map+0x105/0x590 [ 30.356730] ? lockdep_init_map+0x9/0x10 [ 30.360796] ? __init_waitqueue_head+0x96/0x140 [ 30.365449] ? init_wait_entry+0x1b0/0x1b0 [ 30.369681] proc_fill_cache+0x3e5/0x660 [ 30.373732] ? proc_fd_instantiate+0x200/0x200 [ 30.378299] ? proc_task_lookup+0x3b0/0x3b0 [ 30.382613] ? pointer+0xa10/0xa10 [ 30.386145] ? snprintf+0xa5/0xd0 [ 30.389600] proc_readfd_common+0x7bc/0xf40 [ 30.393910] ? proc_fd_instantiate+0x200/0x200 [ 30.398495] ? proc_lookupfdinfo+0x30/0x30 [ 30.402717] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.408244] ? rcu_note_context_switch+0x710/0x710 [ 30.413162] ? __might_sleep+0x95/0x190 [ 30.417125] ? down_read_killable+0xaf/0x1f0 [ 30.421518] ? iterate_dir+0xd4/0x5d0 [ 30.425308] ? down_write+0x120/0x120 [ 30.429105] proc_readfdinfo+0x24/0x30 [ 30.432979] iterate_dir+0x4b0/0x5d0 [ 30.436677] ? vfs_write+0x2a8/0x560 [ 30.440380] __x64_sys_getdents+0x293/0x4e0 [ 30.444691] ? __ia32_sys_old_readdir+0x2a0/0x2a0 [ 30.449515] ? fillonedir+0x2a0/0x2a0 [ 30.453310] ? do_syscall_64+0x92/0x800 [ 30.457274] do_syscall_64+0x1b1/0x800 [ 30.461146] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 30.465977] ? syscall_return_slowpath+0x5c0/0x5c0 [ 30.470893] ? syscall_return_slowpath+0x30f/0x5c0 [ 30.475815] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.481168] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.486002] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.491183] RIP: 0033:0x440579 [ 30.494365] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 30.513688] RSP: 002b:00007fff3e811318 EFLAGS: 00000246 ORIG_RAX: 000000000000004e [ 30.521384] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440579 [ 30.528646] RDX: 0000000000000197 RSI: 0000000020000ea9 RDI: 0000000000000004 [ 30.535898] RBP: 00000000006cb018 R08: 0000000000000001 R09: 65732f636f720031 [ 30.543161] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 30.550424] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 30.559208] BUG: unable to handle kernel paging request at fffffffffffffff4 [ 30.566332] PGD 8c6d067 P4D 8c6d067 PUD 8c6f067 PMD 0 [ 30.571609] Oops: 0000 [#1] SMP KASAN [ 30.575392] CPU: 0 PID: 4515 Comm: syz-executor342 Not tainted 4.17.0+ #84 [ 30.582381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.591725] RIP: 0010:dput.part.26+0x117/0x780 [ 30.596282] Code: ff 09 b3 ff 45 84 ff 0f 84 e2 03 00 00 e8 21 09 b3 ff 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 04 05 00 00 <44> 8b 3b 48 8d 83 80 00 00 00 31 ff 48 89 85 70 ff ff ff 41 83 e7 [ 30.615553] RSP: 0018:ffff8801acdef838 EFLAGS: 00010246 [ 30.620902] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffffff81c64bd2 [ 30.628152] RDX: 0000000000000000 RSI: ffffffff81c647df RDI: 0000000000000001 [ 30.635403] RBP: ffff8801acdef8d0 R08: ffff8801ae482500 R09: ffffed003b5c46d6 [ 30.642656] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 1ffff100359bdf09 [ 30.649907] R13: dffffc0000000000 R14: ffffed00359bdf0d R15: 0000000000000001 [ 30.657170] FS: 0000000001087880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.665389] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.671252] CR2: fffffffffffffff4 CR3: 00000001acf02000 CR4: 00000000001406f0 [ 30.678503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.685758] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.693010] Call Trace: [ 30.695604] ? lockdep_init_map+0x9/0x10 [ 30.699661] ? shrink_dcache_sb+0x340/0x340 [ 30.703976] ? init_wait_entry+0x1b0/0x1b0 [ 30.708197] dput+0x15/0x20 [ 30.711112] proc_fill_cache+0x230/0x660 [ 30.715159] ? proc_task_lookup+0x3b0/0x3b0 [ 30.719486] ? pointer+0xa10/0xa10 [ 30.723026] ? snprintf+0xa5/0xd0 [ 30.726476] proc_readfd_common+0x7bc/0xf40 [ 30.730784] ? proc_fd_instantiate+0x200/0x200 [ 30.735356] ? proc_lookupfdinfo+0x30/0x30 [ 30.739579] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.745100] ? rcu_note_context_switch+0x710/0x710 [ 30.750025] ? __might_sleep+0x95/0x190 [ 30.753992] ? down_read_killable+0xaf/0x1f0 [ 30.758385] ? iterate_dir+0xd4/0x5d0 [ 30.762167] ? down_write+0x120/0x120 [ 30.765973] proc_readfdinfo+0x24/0x30 [ 30.769843] iterate_dir+0x4b0/0x5d0 [ 30.773540] ? vfs_write+0x2a8/0x560 [ 30.777240] __x64_sys_getdents+0x293/0x4e0 [ 30.781549] ? __ia32_sys_old_readdir+0x2a0/0x2a0 [ 30.786374] ? fillonedir+0x2a0/0x2a0 [ 30.790160] ? do_syscall_64+0x92/0x800 [ 30.794132] do_syscall_64+0x1b1/0x800 [ 30.798021] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 30.802855] ? syscall_return_slowpath+0x5c0/0x5c0 [ 30.807768] ? syscall_return_slowpath+0x30f/0x5c0 [ 30.812686] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.818042] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.822875] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.828641] RIP: 0033:0x440579 [ 30.831811] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 30.851082] RSP: 002b:00007fff3e811318 EFLAGS: 00000246 ORIG_RAX: 000000000000004e [ 30.858775] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440579 [ 30.866031] RDX: 0000000000000197 RSI: 0000000020000ea9 RDI: 0000000000000004 [ 30.873283] RBP: 00000000006cb018 R08: 0000000000000001 R09: 65732f636f720031 [ 30.880536] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 30.887788] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 30.895051] Modules linked in: [ 30.898233] Dumping ftrace buffer: [ 30.901754] (ftrace buffer empty) [ 30.905445] CR2: fffffffffffffff4 [ 30.908888] ---[ end trace bfb6fcbb8a19e743 ]--- [ 30.913633] RIP: 0010:dput.part.26+0x117/0x780 [ 30.918190] Code: ff 09 b3 ff 45 84 ff 0f 84 e2 03 00 00 e8 21 09 b3 ff 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 04 05 00 00 <44> 8b 3b 48 8d 83 80 00 00 00 31 ff 48 89 85 70 ff ff ff 41 83 e7 [ 30.937445] RSP: 0018:ffff8801acdef838 EFLAGS: 00010246 [ 30.942790] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffffff81c64bd2 [ 30.950042] RDX: 0000000000000000 RSI: ffffffff81c647df RDI: 0000000000000001 [ 30.957292] RBP: ffff8801acdef8d0 R08: ffff8801ae482500 R09: ffffed003b5c46d6 [ 30.964542] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 1ffff100359bdf09 [ 30.971793] R13: dffffc0000000000 R14: ffffed00359bdf0d R15: 0000000000000001 [ 30.979048] FS: 0000000001087880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.987254] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.993119] CR2: fffffffffffffff4 CR3: 00000001acf02000 CR4: 00000000001406f0 [ 31.000379] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.007632] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.014882] Kernel panic - not syncing: Fatal exception [ 31.020726] Dumping ftrace buffer: [ 31.024248] (ftrace buffer empty) [ 31.027959] Kernel Offset: disabled [ 31.031572] Rebooting in 86400 seconds..