[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.242796] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.990810] random: sshd: uninitialized urandom read (32 bytes read) [ 38.378378] random: sshd: uninitialized urandom read (32 bytes read) [ 39.759671] random: sshd: uninitialized urandom read (32 bytes read) [ 55.333464] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. [ 60.883829] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/13 12:52:37 parsed 1 programs [ 62.184214] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/13 12:52:39 executed programs: 0 [ 63.929849] IPVS: ftp: loaded support on port[0] = 21 [ 64.941428] FAULT_INJECTION: forcing a failure. [ 64.941428] name failslab, interval 1, probability 0, space 0, times 1 [ 64.952754] CPU: 1 PID: 4631 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #26 [ 64.959967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.969314] Call Trace: [ 64.971930] dump_stack+0x185/0x1e0 [ 64.975559] should_fail+0x8a7/0xae0 [ 64.979272] __should_failslab+0x278/0x2a0 [ 64.983508] should_failslab+0x29/0x70 [ 64.987390] __kmalloc_node+0x23c/0x1240 [ 64.991455] ? kmsan_set_origin_inline+0x6b/0x120 [ 64.996303] ? kvmalloc_node+0x19d/0x370 [ 65.000368] kvmalloc_node+0x19d/0x370 [ 65.004252] semctl_main+0xcf2/0x5980 [ 65.008086] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.012938] ? kmsan_set_origin+0x9e/0x160 [ 65.017185] ? task_kmsan_context_state+0x6b/0x120 [ 65.022128] ? task_kmsan_context_state+0x6b/0x120 [ 65.027065] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 65.032526] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.037381] ? __msan_poison_alloca+0x183/0x220 [ 65.042075] ? __x64_sys_semctl+0x11e/0x170 [ 65.046452] ? ksys_semctl+0xa4/0x730 [ 65.050259] ksys_semctl+0x5ef/0x730 [ 65.054018] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 65.059400] ? fput+0x269/0x300 [ 65.062701] __x64_sys_semctl+0x11e/0x170 [ 65.066860] ? semctl_down+0xf00/0xf00 [ 65.070754] do_syscall_64+0x15b/0x230 [ 65.074641] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 65.079826] RIP: 0033:0x455ab9 [ 65.083003] Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.102354] RSP: 002b:00007f4aa58d7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000042 [ 65.110071] RAX: ffffffffffffffda RBX: 00007f4aa58d86d4 RCX: 0000000000455ab9 [ 65.117844] RDX: 000000000000000d RSI: 0000000000000000 RDI: 0000000000000000 [ 65.125121] RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 [ 65.132380] R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000003 [ 65.139653] R13: 00000000004c0c8f R14: 00000000004d11e8 R15: 0000000000000000 [ 65.148470] ================================================================== [ 65.155874] BUG: KMSAN: kernel-infoleak in semctl_main+0x1361/0x5980 [ 65.162366] CPU: 1 PID: 4631 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #26 [ 65.169532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.178866] Call Trace: [ 65.181445] dump_stack+0x185/0x1e0 [ 65.185060] kmsan_report+0x195/0x2c0 [ 65.188846] kmsan_internal_check_memory+0x148/0x210 [ 65.193936] kmsan_copy_to_user+0x83/0xe0 [ 65.198069] semctl_main+0x1361/0x5980 [ 65.202034] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.206859] ? kmsan_set_origin+0x9e/0x160 [ 65.211079] ? task_kmsan_context_state+0x6b/0x120 [ 65.215991] ? task_kmsan_context_state+0x6b/0x120 [ 65.220909] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 65.226341] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.231165] ? __msan_poison_alloca+0x183/0x220 [ 65.235815] ? __x64_sys_semctl+0x11e/0x170 [ 65.240127] ? ksys_semctl+0xa4/0x730 [ 65.243915] ksys_semctl+0x5ef/0x730 [ 65.247615] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 65.252969] ? fput+0x269/0x300 [ 65.256230] __x64_sys_semctl+0x11e/0x170 [ 65.260361] ? semctl_down+0xf00/0xf00 [ 65.264240] do_syscall_64+0x15b/0x230 [ 65.268118] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 65.273297] RIP: 0033:0x455ab9 [ 65.276464] Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.295619] RSP: 002b:00007f4aa58d7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000042 [ 65.303313] RAX: ffffffffffffffda RBX: 00007f4aa58d86d4 RCX: 0000000000455ab9 [ 65.310573] RDX: 000000000000000d RSI: 0000000000000000 RDI: 0000000000000000 [ 65.317831] RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 [ 65.325091] R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000003 [ 65.332349] R13: 00000000004c0c8f R14: 00000000004d11e8 R15: 0000000000000000 [ 65.339614] [ 65.341235] Uninit was created at: [ 65.344853] kmsan_internal_alloc_meta_for_pages+0x157/0x730 [ 65.350638] kmsan_alloc_page+0x80/0xe0 [ 65.354594] __alloc_pages_nodemask+0x105b/0x6320 [ 65.359427] alloc_pages_current+0x6b1/0x970 [ 65.363817] __vmalloc_node_range+0x8bf/0x1170 [ 65.368381] __vmalloc_node_flags_caller+0x12b/0x140 [ 65.373465] kvmalloc_node+0x330/0x370 [ 65.377336] semctl_main+0xcf2/0x5980 [ 65.381113] ksys_semctl+0x5ef/0x730 [ 65.384805] __x64_sys_semctl+0x11e/0x170 [ 65.388932] do_syscall_64+0x15b/0x230 [ 65.392800] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 65.397963] [ 65.399569] Byte 4096 of 4100 is uninitialized [ 65.404125] Memory access starts at ffffc90001956000 [ 65.409216] ================================================================== [ 65.416558] Disabling lock debugging due to kernel taint [ 65.421992] Kernel panic - not syncing: panic_on_warn set ... [ 65.421992] [ 65.429350] CPU: 1 PID: 4631 Comm: syz-executor0 Tainted: G B 4.18.0-rc4+ #26 [ 65.437910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.447244] Call Trace: [ 65.449825] dump_stack+0x185/0x1e0 [ 65.453441] panic+0x3d0/0x9b0 [ 65.456628] kmsan_report+0x2bf/0x2c0 [ 65.460412] kmsan_internal_check_memory+0x148/0x210 [ 65.465501] kmsan_copy_to_user+0x83/0xe0 [ 65.469736] semctl_main+0x1361/0x5980 [ 65.473619] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.478444] ? kmsan_set_origin+0x9e/0x160 [ 65.482663] ? task_kmsan_context_state+0x6b/0x120 [ 65.487575] ? task_kmsan_context_state+0x6b/0x120 [ 65.492498] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 65.497931] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.502765] ? __msan_poison_alloca+0x183/0x220 [ 65.507414] ? __x64_sys_semctl+0x11e/0x170 [ 65.511715] ? ksys_semctl+0xa4/0x730 [ 65.515498] ksys_semctl+0x5ef/0x730 [ 65.519193] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 65.524536] ? fput+0x269/0x300 [ 65.527800] __x64_sys_semctl+0x11e/0x170 [ 65.531940] ? semctl_down+0xf00/0xf00 [ 65.535809] do_syscall_64+0x15b/0x230 [ 65.539682] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 65.544853] RIP: 0033:0x455ab9 [ 65.548020] Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.567175] RSP: 002b:00007f4aa58d7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000042 [ 65.574870] RAX: ffffffffffffffda RBX: 00007f4aa58d86d4 RCX: 0000000000455ab9 [ 65.582129] RDX: 000000000000000d RSI: 0000000000000000 RDI: 0000000000000000 [ 65.589391] RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 [ 65.596640] R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000003 [ 65.603887] R13: 00000000004c0c8f R14: 00000000004d11e8 R15: 0000000000000000 [ 65.611640] Dumping ftrace buffer: [ 65.615155] (ftrace buffer empty) [ 65.618845] Kernel Offset: disabled [ 65.622461] Rebooting in 86400 seconds..