INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] 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[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.490245] ================================================================== [ 60.497641] BUG: KMSAN: uninit-value in strnlen+0xc4/0x110 [ 60.503244] CPU: 1 PID: 4507 Comm: syzkaller579712 Not tainted 4.16.0+ #85 [ 60.510233] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.519565] Call Trace: [ 60.522138] dump_stack+0x185/0x1d0 [ 60.525750] ? strnlen+0xc4/0x110 [ 60.529181] kmsan_report+0x142/0x240 [ 60.532959] __msan_warning_32+0x6c/0xb0 [ 60.536997] strnlen+0xc4/0x110 [ 60.540255] dev_get_by_name+0x6e/0x350 [ 60.544208] pppoe_connect+0xcb7/0x2360 [ 60.548174] ? kmsan_set_origin+0x9e/0x160 [ 60.552396] ? security_socket_connect+0x5d/0x210 [ 60.557217] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 60.562559] ? security_socket_connect+0x9e/0x210 [ 60.567380] ? pppoe_release+0xcc0/0xcc0 [ 60.571423] SYSC_connect+0x41a/0x510 [ 60.575203] SyS_connect+0x54/0x80 [ 60.578723] do_syscall_64+0x309/0x430 [ 60.582587] ? SYSC_accept+0xb0/0xb0 [ 60.586286] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 60.591462] RIP: 0033:0x43fcf9 [ 60.594642] RSP: 002b:00007ffca4bd4978 EFLAGS: 00000213 ORIG_RAX: 000000000000002a [ 60.602344] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcf9 [ 60.609594] RDX: 0000000000000007 RSI: 0000000020000040 RDI: 0000000000000003 [ 60.616864] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 60.624111] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401620 [ 60.631377] R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000 [ 60.638631] [ 60.640235] Local variable description: ----address@SYSC_connect [ 60.646355] Variable was created at: [ 60.650066] SYSC_connect+0x6f/0x510 [ 60.653768] SyS_connect+0x54/0x80 [ 60.657283] ================================================================== [ 60.664618] Disabling lock debugging due to kernel taint [ 60.670042] Kernel panic - not syncing: panic_on_warn set ... [ 60.670042] [ 60.677384] CPU: 1 PID: 4507 Comm: syzkaller579712 Tainted: G B 4.16.0+ #85 [ 60.685671] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.695001] Call Trace: [ 60.697574] dump_stack+0x185/0x1d0 [ 60.701178] panic+0x39d/0x940 [ 60.704355] ? strnlen+0xc4/0x110 [ 60.707792] kmsan_report+0x238/0x240 [ 60.711571] __msan_warning_32+0x6c/0xb0 [ 60.715610] strnlen+0xc4/0x110 [ 60.718865] dev_get_by_name+0x6e/0x350 [ 60.722816] pppoe_connect+0xcb7/0x2360 [ 60.726768] ? kmsan_set_origin+0x9e/0x160 [ 60.730979] ? security_socket_connect+0x5d/0x210 [ 60.735799] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 60.741138] ? security_socket_connect+0x9e/0x210 [ 60.745957] ? pppoe_release+0xcc0/0xcc0 [ 60.750001] SYSC_connect+0x41a/0x510 [ 60.753781] SyS_connect+0x54/0x80 [ 60.757298] do_syscall_64+0x309/0x430 [ 60.761162] ? SYSC_accept+0xb0/0xb0 [ 60.764854] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 60.770020] RIP: 0033:0x43fcf9 [ 60.773186] RSP: 002b:00007ffca4bd4978 EFLAGS: 00000213 ORIG_RAX: 000000000000002a [ 60.780868] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcf9 [ 60.788126] RDX: 0000000000000007 RSI: 0000000020000040 RDI: 0000000000000003 [ 60.795374] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 60.802628] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401620 [ 60.809885] R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000 [ 60.817527] Dumping ftrace buffer: [ 60.821048] (ftrace buffer empty) [ 60.824742] Kernel Offset: disabled [ 60.828348] Rebooting in 86400 seconds..