[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 5.946591] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.018220] random: sshd: uninitialized urandom read (32 bytes read) [ 21.358744] random: sshd: uninitialized urandom read (32 bytes read) [ 21.628633] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.59' (ECDSA) to the list of known hosts. [ 27.134475] urandom_read: 1 callbacks suppressed [ 27.134477] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 27.201449] FAULT_INJECTION: forcing a failure. [ 27.201449] name failslab, interval 1, probability 0, space 0, times 1 [ 27.212743] CPU: 1 PID: 4016 Comm: syz-executor855 Not tainted 4.18.0-rc8+ #31 [ 27.220073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.229400] Call Trace: [ 27.232054] dump_stack+0xae/0xf0 [ 27.235543] should_fail+0x144/0x230 [ 27.239272] ? __should_failslab+0x67/0x90 [ 27.243481] __should_failslab+0x7e/0x90 [ 27.247515] should_failslab+0x9/0x20 [ 27.251286] __kmalloc+0x61/0x250 [ 27.254719] ? _raw_spin_unlock_bh+0x15/0x20 [ 27.259101] rpcb_getport_async+0x298/0x450 [ 27.263443] ? should_failslab+0x9/0x20 [ 27.267399] ? kmem_cache_alloc+0x3b/0x1c0 [ 27.271606] ? should_fail+0x76/0x230 [ 27.275382] ? mempool_alloc_slab+0x1d/0x30 [ 27.279672] ? mempool_alloc+0x66/0x1d0 [ 27.283616] ? call_allocate+0x1a0/0x1a0 [ 27.287690] call_bind+0x54/0x60 [ 27.291051] __rpc_execute+0x130/0x480 [ 27.294912] ? rpc_client_register+0xd0/0x260 [ 27.299381] ? time_cpufreq_notifier+0x130/0x130 [ 27.304165] rpc_execute+0xff/0x180 [ 27.307769] rpc_run_task+0x1a3/0x1d0 [ 27.311583] rpc_create_xprt+0x169/0x2b0 [ 27.315625] rpc_create+0x1d6/0x210 [ 27.319224] ? generic_create_cred+0x88/0xb0 [ 27.323604] ? rpcauth_lookup_credcache+0x303/0x380 [ 27.328591] nfs_create_rpc_client+0x149/0x180 [ 27.333144] nfs_init_client+0x28/0x70 [ 27.337005] nfs_get_client+0x3f6/0x490 [ 27.341078] nfs_create_server+0x2b2/0x9a0 [ 27.345289] ? __follow_mount_rcu+0x102/0x160 [ 27.349795] ? lookup_fast+0x13f/0x450 [ 27.353657] nfs_try_mount+0xf4/0x4d0 [ 27.357428] ? should_fail+0x76/0x230 [ 27.361199] ? __should_failslab+0x67/0x90 [ 27.365406] ? __should_failslab+0x7e/0x90 [ 27.369615] ? should_failslab+0x9/0x20 [ 27.373566] ? __kmalloc_track_caller+0x60/0x250 [ 27.378295] ? __kmalloc+0x61/0x250 [ 27.381941] ? should_failslab+0x9/0x20 [ 27.385895] ? get_nfs_version+0x13f/0x160 [ 27.390102] nfs_fs_mount+0xc3c/0xd90 [ 27.393872] ? nfs_parse_mount_options+0x14d0/0x14d0 [ 27.398943] ? nfs_fill_super+0x260/0x260 [ 27.403090] mount_fs+0x8c/0x190 [ 27.406431] vfs_kern_mount+0x83/0x1a0 [ 27.410289] do_mount+0x2cb/0x1120 [ 27.413801] ksys_mount+0xcc/0x100 [ 27.417312] __x64_sys_mount+0x26/0x30 [ 27.421257] do_syscall_64+0x61/0x90 [ 27.424944] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 27.430146] RIP: 0033:0x4410b9 [ 27.433309] Code: e8 0c ad 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 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 27.452363] RSP: 002b:00007fff63d07d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 27.460178] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004410b9 [ 27.467422] RDX: 000000002015bffc RSI: 0000000020343ff8 RDI: 0000000020000040 [ 27.474667] RBP: 00007fff63d07d70 R08: 000000002000a000 R09: 0000000000000000 [ 27.481911] R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff [ 27.489158] R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000 executing program [ 27.753745] FAULT_INJECTION: forcing a failure. [ 27.753745] name failslab, interval 1, probability 0, space 0, times 0 [ 27.765027] CPU: 1 PID: 4017 Comm: syz-executor855 Not tainted 4.18.0-rc8+ #31 [ 27.772372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.781800] Call Trace: [ 27.784371] dump_stack+0xae/0xf0 [ 27.787798] should_fail+0x144/0x230 [ 27.791486] ? __should_failslab+0x67/0x90 [ 27.795690] __should_failslab+0x7e/0x90 [ 27.799762] should_failslab+0x9/0x20 [ 27.803539] __kmalloc_track_caller+0x60/0x250 [ 27.808095] ? xprt_create_transport+0x1b4/0x2b0 [ 27.812821] ? rpc_create+0xcd/0x210 [ 27.816505] kstrdup+0x35/0x70 [ 27.819671] rpc_sockaddr2uaddr+0x16e/0x190 [ 27.823966] ? rpcb_getport_async+0x298/0x450 [ 27.828435] rpcb_getport_async+0x367/0x450 [ 27.832729] ? should_failslab+0x9/0x20 [ 27.836673] ? kmem_cache_alloc+0x3b/0x1c0 [ 27.841120] ? should_fail+0x76/0x230 [ 27.844893] ? mempool_alloc_slab+0x1d/0x30 [ 27.849192] ? mempool_alloc+0x66/0x1d0 [ 27.853136] ? call_allocate+0x1a0/0x1a0 [ 27.857231] call_bind+0x54/0x60 [ 27.860583] __rpc_execute+0x130/0x480 [ 27.864441] ? rpc_client_register+0xd0/0x260 [ 27.868911] ? time_cpufreq_notifier+0x130/0x130 [ 27.873638] rpc_execute+0xff/0x180 [ 27.877235] rpc_run_task+0x1a3/0x1d0 [ 27.881007] rpc_create_xprt+0x169/0x2b0 [ 27.885057] rpc_create+0x1d6/0x210 [ 27.888656] ? generic_match+0xd4/0x120 [ 27.892603] ? rpcauth_lookup_credcache+0x303/0x380 [ 27.897590] nfs_create_rpc_client+0x149/0x180 [ 27.902146] nfs_init_client+0x28/0x70 [ 27.906004] nfs_get_client+0x3f6/0x490 [ 27.909998] nfs_create_server+0x2b2/0x9a0 [ 27.914224] ? __follow_mount_rcu+0x102/0x160 [ 27.918745] ? lookup_fast+0x13f/0x450 [ 27.922613] nfs_try_mount+0xf4/0x4d0 [ 27.926387] ? should_fail+0x76/0x230 [ 27.930166] ? __should_failslab+0x67/0x90 [ 27.934371] ? __should_failslab+0x7e/0x90 [ 27.938591] ? should_failslab+0x9/0x20 [ 27.942581] ? __kmalloc_track_caller+0x60/0x250 [ 27.947318] ? __kmalloc+0x61/0x250 [ 27.950921] ? should_failslab+0x9/0x20 [ 27.954866] ? get_nfs_version+0x13f/0x160 [ 27.959148] nfs_fs_mount+0xc3c/0xd90 [ 27.962927] ? nfs_parse_mount_options+0x14d0/0x14d0 [ 27.968147] ? nfs_fill_super+0x260/0x260 [ 27.972271] mount_fs+0x8c/0x190 [ 27.975610] vfs_kern_mount+0x83/0x1a0 [ 27.979467] do_mount+0x2cb/0x1120 [ 27.982979] ksys_mount+0xcc/0x100 [ 27.986533] __x64_sys_mount+0x26/0x30 [ 27.990467] do_syscall_64+0x61/0x90 [ 27.994159] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 27.999320] RIP: 0033:0x4410b9 [ 28.002478] Code: e8 0c ad 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 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 28.021470] RSP: 002b:00007fff63d07d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 28.029147] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004410b9 [ 28.036388] RDX: 000000002015bffc RSI: 0000000020343ff8 RDI: 0000000020000040 [ 28.043634] RBP: 00007fff63d07d70 R08: 000000002000a000 R09: 0000000000000000 [ 28.050875] R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff [ 28.058118] R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000 [ 28.065730] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 28.073783] PGD 80000001ffe50067 P4D 80000001ffe50067 PUD 1ffe06067 PMD 0 [ 28.080766] Oops: 0000 [#1] SMP PTI [ 28.084376] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.18.0-rc8+ #31 [ 28.091183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.100521] Workqueue: rpciod rpc_async_schedule [ 28.105252] RIP: 0010:strlen+0x10/0x20 [ 28.109145] Code: 00 00 43 c6 04 3e 00 48 89 d8 5b 41 5e 41 5f 5d c3 66 0f 1f 84 00 00 00 00 00 48 8d 47 ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 <80> 78 01 00 48 8d 40 01 75 f6 48 29 f8 c3 66 90 41 56 53 48 c7 c0 [ 28.128142] RSP: 0018:ffff880216967cf8 EFLAGS: 00010293 [ 28.133478] RAX: ffffffffffffffff RBX: 0000000000000004 RCX: ffff88021693d280 [ 28.140722] RDX: 0000000000000000 RSI: ffffffff832b341e RDI: 0000000000000000 [ 28.148002] RBP: ffff880216967d28 R08: ffff8801ffc87680 R09: ffff88020c180039 [ 28.155315] R10: fefefefefefefeff R11: ffffffff826e4ad0 R12: 0000000000000000 [ 28.162566] R13: 0000000000000004 R14: ffff880216967d38 R15: ffff8801ffc87680 [ 28.169810] FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 28.178009] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.183889] CR2: 0000000000000000 CR3: 000000021208c000 CR4: 00000000001406e0 [ 28.191139] Call Trace: [ 28.193698] ? rpcb_enc_getaddr+0x85/0x130 [ 28.197905] ? rpcb_getport_async+0x450/0x450 [ 28.202375] rpcauth_wrap_req+0x8a/0xa0 [ 28.206320] ? rpcb_getport_async+0x450/0x450 [ 28.210786] call_transmit+0x1a4/0x2a0 [ 28.214644] ? call_bind_status+0x2f0/0x2f0 [ 28.218935] __rpc_execute+0x130/0x480 [ 28.222793] rpc_async_schedule+0x19/0x20 [ 28.226914] process_one_work+0x28e/0x580 [ 28.231041] worker_thread+0x317/0x690 [ 28.234904] kthread+0x127/0x140 [ 28.238257] ? process_one_work+0x580/0x580 [ 28.242547] ? kthread_blkcg+0x50/0x50 [ 28.246408] ret_from_fork+0x35/0x40 [ 28.250139] Modules linked in: [ 28.253308] Dumping ftrace buffer: [ 28.256817] (ftrace buffer empty) [ 28.260504] CR2: 0000000000000000 [ 28.263928] ---[ end trace 58b097d048d2e157 ]--- [ 28.268654] RIP: 0010:strlen+0x10/0x20 [ 28.272554] Code: 00 00 43 c6 04 3e 00 48 89 d8 5b 41 5e 41 5f 5d c3 66 0f 1f 84 00 00 00 00 00 48 8d 47 ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 <80> 78 01 00 48 8d 40 01 75 f6 48 29 f8 c3 66 90 41 56 53 48 c7 c0 [ 28.291721] RSP: 0018:ffff880216967cf8 EFLAGS: 00010293 [ 28.297058] RAX: ffffffffffffffff RBX: 0000000000000004 RCX: ffff88021693d280 [ 28.304405] RDX: 0000000000000000 RSI: ffffffff832b341e RDI: 0000000000000000 [ 28.311735] RBP: ffff880216967d28 R08: ffff8801ffc87680 R09: ffff88020c180039 [ 28.318983] R10: fefefefefefefeff R11: ffffffff826e4ad0 R12: 0000000000000000 [ 28.326267] R13: 0000000000000004 R14: ffff880216967d38 R15: ffff8801ffc87680 [ 28.333513] FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 28.341773] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.347671] CR2: 0000000000000000 CR3: 000000021208c000 CR4: 00000000001406e0 [ 28.354918] Kernel panic - not syncing: Fatal exception [ 28.360542] Dumping ftrace buffer: [ 28.364064] (ftrace buffer empty) [ 28.367749] Kernel Offset: disabled [ 28.371345] Rebooting in 86400 seconds..