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 '10.128.0.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.625110] IPVS: ftp: loaded support on port[0] = 21 [ 43.661823] ================================================================== [ 43.669222] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 43.675256] CPU: 1 PID: 4518 Comm: syzkaller390098 Not tainted 4.16.0+ #85 [ 43.682239] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.691569] Call Trace: [ 43.694140] dump_stack+0x185/0x1d0 [ 43.697742] ? load_script+0x3ae/0xcd0 [ 43.701610] kmsan_report+0x142/0x240 [ 43.705388] __msan_warning_32+0x6c/0xb0 [ 43.709430] ? search_binary_handler+0x230/0xac0 [ 43.714165] load_script+0x3ae/0xcd0 [ 43.718254] ? bm_evict_inode+0x1a0/0x1a0 [ 43.722384] search_binary_handler+0x2ef/0xac0 [ 43.726950] do_execveat_common+0x1f4d/0x2ce0 [ 43.731434] SYSC_execve+0xe2/0x110 [ 43.735043] SyS_execve+0x56/0x80 [ 43.738473] do_syscall_64+0x309/0x430 [ 43.742339] ? set_binfmt+0x1b0/0x1b0 [ 43.746122] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.751288] RIP: 0033:0x446049 [ 43.754455] RSP: 002b:00007f77b3dfcda8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b [ 43.762136] RAX: ffffffffffffffda RBX: 00000000006f0024 RCX: 0000000000446049 [ 43.769383] RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000020000200 [ 43.776634] RBP: 00000000006f0020 R08: 0000000000000000 R09: 0000000000000000 [ 43.783894] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 43.791137] R13: 6573752b666c6573 R14: 7079745f656d696d R15: 0000000000002710 [ 43.798386] [ 43.799990] Uninit was stored to memory at: [ 43.804301] kmsan_internal_chain_origin+0x12b/0x210 [ 43.809385] kmsan_memcpy_origins+0x11d/0x170 [ 43.813855] __msan_memcpy+0x109/0x160 [ 43.817722] _copy_to_iter+0xea2/0x28f0 [ 43.821674] copy_page_to_iter+0x383/0x1b70 [ 43.825970] shmem_file_read_iter+0x99f/0x1180 [ 43.830531] __vfs_read+0x7dd/0x9b0 [ 43.834132] vfs_read+0x36c/0x6c0 [ 43.837558] kernel_read+0x11f/0x1a0 [ 43.841248] prepare_binprm+0x982/0xad0 [ 43.845194] do_execveat_common+0x1b35/0x2ce0 [ 43.849664] SYSC_execve+0xe2/0x110 [ 43.853264] SyS_execve+0x56/0x80 [ 43.856694] do_syscall_64+0x309/0x430 [ 43.860558] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.865717] Uninit was created at: [ 43.869236] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 43.874231] kmsan_alloc_page+0x82/0xe0 [ 43.878179] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 43.882909] alloc_pages_vma+0xcc8/0x1800 [ 43.887037] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 43.892027] shmem_getpage_gfp+0x35db/0x5770 [ 43.896406] shmem_file_read_iter+0x508/0x1180 [ 43.900965] __vfs_read+0x7dd/0x9b0 [ 43.904567] vfs_read+0x36c/0x6c0 [ 43.907998] kernel_read+0x11f/0x1a0 [ 43.911690] prepare_binprm+0x982/0xad0 [ 43.915637] do_execveat_common+0x1b35/0x2ce0 [ 43.920105] SYSC_execve+0xe2/0x110 [ 43.923710] SyS_execve+0x56/0x80 [ 43.927137] do_syscall_64+0x309/0x430 [ 43.931002] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.936160] ================================================================== [ 43.943489] Disabling lock debugging due to kernel taint [ 43.948914] Kernel panic - not syncing: panic_on_warn set ... [ 43.948914] [ 43.956254] CPU: 1 PID: 4518 Comm: syzkaller390098 Tainted: G B 4.16.0+ #85 [ 43.964540] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.973868] Call Trace: [ 43.976437] dump_stack+0x185/0x1d0 [ 43.980041] panic+0x39d/0x940 [ 43.983218] ? load_script+0x3ae/0xcd0 [ 43.987081] kmsan_report+0x238/0x240 [ 43.990856] __msan_warning_32+0x6c/0xb0 [ 43.994897] ? search_binary_handler+0x230/0xac0 [ 43.999627] load_script+0x3ae/0xcd0 [ 44.003321] ? bm_evict_inode+0x1a0/0x1a0 [ 44.007447] search_binary_handler+0x2ef/0xac0 [ 44.012010] do_execveat_common+0x1f4d/0x2ce0 [ 44.016489] SYSC_execve+0xe2/0x110 [ 44.020095] SyS_execve+0x56/0x80 [ 44.023524] do_syscall_64+0x309/0x430 [ 44.027390] ? set_binfmt+0x1b0/0x1b0 [ 44.031166] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.036330] RIP: 0033:0x446049 [ 44.039497] RSP: 002b:00007f77b3dfcda8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b [ 44.047194] RAX: ffffffffffffffda RBX: 00000000006f0024 RCX: 0000000000446049 [ 44.054443] RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000020000200 [ 44.061689] RBP: 00000000006f0020 R08: 0000000000000000 R09: 0000000000000000 [ 44.068933] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 44.076183] R13: 6573752b666c6573 R14: 7079745f656d696d R15: 0000000000002710 [ 44.084003] Dumping ftrace buffer: [ 44.087534] (ftrace buffer empty) [ 44.091218] Kernel Offset: disabled [ 44.094821] Rebooting in 86400 seconds..