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 '10.128.0.49' (ECDSA) to the list of known hosts. 2018/05/02 13:47:58 parsed 1 programs 2018/05/02 13:47:58 executed programs: 0 syzkaller login: [ 62.514091] IPVS: ftp: loaded support on port[0] = 21 [ 63.440668] ================================================================== [ 63.448078] BUG: KMSAN: uninit-value in do_error_trap+0x39b/0x600 [ 63.454296] CPU: 0 PID: 4514 Comm: 3 Not tainted 4.16.0+ #87 [ 63.460094] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.469434] Call Trace: [ 63.472019] dump_stack+0x185/0x1d0 [ 63.475722] ? do_error_trap+0x39b/0x600 [ 63.479763] kmsan_report+0x142/0x240 [ 63.483634] __msan_warning_32+0x6c/0xb0 [ 63.487673] do_error_trap+0x39b/0x600 [ 63.491545] ? kmsan_set_origin_inline+0x6b/0x120 [ 63.496369] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.501025] ? load_elf_binary+0x6c5/0x8f90 [ 63.505338] do_invalid_op+0x46/0x50 [ 63.509044] invalid_op+0x1b/0x40 [ 63.512484] RIP: 0010:task_participate_group_stop+0x344/0x570 [ 63.518518] RSP: 0018:ffff8801a00ef850 EFLAGS: 00010093 [ 63.523874] RAX: ffffffff8125f384 RBX: 0000000000000000 RCX: ffff8801b4b81d80 [ 63.531128] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 63.538391] RBP: ffff8801a00ef8d0 R08: 0000000001080020 R09: 0000000000000002 [ 63.545655] R10: ffff88019a6a8000 R11: 000000018040003f R12: 0000000000000000 [ 63.553013] R13: ffff8801a722a068 R14: 00000000ffffffff R15: 0000000000000000 [ 63.560292] ? task_participate_group_stop+0x344/0x570 [ 63.565554] do_signal_stop+0xbd3/0x1080 [ 63.569600] get_signal+0xbdd/0x1f20 [ 63.573299] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.577962] ? put_files_struct+0x517/0x550 [ 63.582281] ? kmem_cache_free+0xec/0x2bc0 [ 63.586496] ? put_files_struct+0x517/0x550 [ 63.590809] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.595485] ? prepare_exit_to_usermode+0x271/0x3a0 [ 63.600499] ? prepare_exit_to_usermode+0x271/0x3a0 [ 63.605501] do_signal+0xb8/0x1c80 [ 63.609024] ? put_files_struct+0x517/0x550 [ 63.613516] ? kmsan_set_origin_inline+0x6b/0x120 [ 63.618349] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.623020] ? syscall_return_slowpath+0xe9/0x700 [ 63.627853] ? prepare_exit_to_usermode+0x4a/0x3a0 [ 63.632763] ? prepare_exit_to_usermode+0xd3/0x3a0 [ 63.637671] prepare_exit_to_usermode+0x271/0x3a0 [ 63.642499] syscall_return_slowpath+0xe9/0x700 [ 63.647159] ? SYSC_execveat+0x149/0x170 [ 63.651200] do_syscall_64+0x36d/0x430 [ 63.655067] ? SYSC_execve+0x110/0x110 [ 63.658942] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 63.664112] RIP: 0033:0x127 [ 63.667030] RSP: 002b:00007ffe94ddc1d0 EFLAGS: 00000200 ORIG_RAX: 000000000000003b [ 63.674732] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 63.682067] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 63.689321] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 63.696569] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 63.703818] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 63.712459] [ 63.714067] Local variable description: ----oldbit.i.i.i@kfree [ 63.720008] Variable was created at: [ 63.723723] kfree+0xcb/0x29e0 [ 63.726913] load_elf_binary+0x6c5/0x8f90 [ 63.731055] ================================================================== [ 63.738414] Disabling lock debugging due to kernel taint [ 63.743853] Kernel panic - not syncing: panic_on_warn set ... [ 63.743853] [ 63.751234] CPU: 0 PID: 4514 Comm: 3 Tainted: G B 4.16.0+ #87 [ 63.758482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.767827] Call Trace: [ 63.770407] dump_stack+0x185/0x1d0 [ 63.774195] panic+0x39d/0x940 [ 63.777380] ? do_error_trap+0x39b/0x600 [ 63.781425] kmsan_report+0x238/0x240 [ 63.785219] __msan_warning_32+0x6c/0xb0 [ 63.789265] do_error_trap+0x39b/0x600 [ 63.793151] ? kmsan_set_origin_inline+0x6b/0x120 [ 63.797971] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.802629] ? load_elf_binary+0x6c5/0x8f90 [ 63.806944] do_invalid_op+0x46/0x50 [ 63.810725] invalid_op+0x1b/0x40 [ 63.814162] RIP: 0010:task_participate_group_stop+0x344/0x570 [ 63.820025] RSP: 0018:ffff8801a00ef850 EFLAGS: 00010093 [ 63.825378] RAX: ffffffff8125f384 RBX: 0000000000000000 RCX: ffff8801b4b81d80 [ 63.832642] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 63.840420] RBP: ffff8801a00ef8d0 R08: 0000000001080020 R09: 0000000000000002 [ 63.847690] R10: ffff88019a6a8000 R11: 000000018040003f R12: 0000000000000000 [ 63.854945] R13: ffff8801a722a068 R14: 00000000ffffffff R15: 0000000000000000 [ 63.862225] ? task_participate_group_stop+0x344/0x570 [ 63.867487] do_signal_stop+0xbd3/0x1080 [ 63.871539] get_signal+0xbdd/0x1f20 [ 63.875258] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.879918] ? put_files_struct+0x517/0x550 [ 63.884235] ? kmem_cache_free+0xec/0x2bc0 [ 63.888456] ? put_files_struct+0x517/0x550 [ 63.892766] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.897419] ? prepare_exit_to_usermode+0x271/0x3a0 [ 63.902424] ? prepare_exit_to_usermode+0x271/0x3a0 [ 63.907425] do_signal+0xb8/0x1c80 [ 63.910964] ? put_files_struct+0x517/0x550 [ 63.915273] ? kmsan_set_origin_inline+0x6b/0x120 [ 63.920096] ? __msan_poison_alloca+0x15c/0x1d0 [ 63.924747] ? syscall_return_slowpath+0xe9/0x700 [ 63.929568] ? prepare_exit_to_usermode+0x4a/0x3a0 [ 63.934486] ? prepare_exit_to_usermode+0xd3/0x3a0 [ 63.939401] prepare_exit_to_usermode+0x271/0x3a0 [ 63.944415] syscall_return_slowpath+0xe9/0x700 [ 63.949161] ? SYSC_execveat+0x149/0x170 [ 63.953205] do_syscall_64+0x36d/0x430 [ 63.957084] ? SYSC_execve+0x110/0x110 [ 63.960964] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 63.966136] RIP: 0033:0x127 [ 63.969042] RSP: 002b:00007ffe94ddc1d0 EFLAGS: 00000200 ORIG_RAX: 000000000000003b [ 63.976752] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 63.984003] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 63.991254] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 63.998593] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 64.005853] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 65.115005] Shutting down cpus with NMI [ 65.130616] Dumping ftrace buffer: [ 65.134174] (ftrace buffer empty) [ 65.137893] Kernel Offset: disabled [ 65.141500] Rebooting in 86400 seconds..