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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.360102] ================================================================== [ 43.367490] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 43.373530] CPU: 1 PID: 3560 Comm: syzkaller263528 Not tainted 4.16.0+ #84 [ 43.380516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.389847] Call Trace: [ 43.392417] dump_stack+0x185/0x1d0 [ 43.396036] ? load_script+0x3ae/0xcd0 [ 43.399905] kmsan_report+0x142/0x240 [ 43.403684] __msan_warning_32+0x6c/0xb0 [ 43.407723] ? search_binary_handler+0x210/0xac0 [ 43.412455] load_script+0x3ae/0xcd0 [ 43.416147] ? bm_evict_inode+0x1a0/0x1a0 [ 43.420282] search_binary_handler+0x2ef/0xac0 [ 43.424842] do_execveat_common+0x1f4d/0x2ce0 [ 43.429319] SYSC_execve+0xe2/0x110 [ 43.432926] SyS_execve+0x56/0x80 [ 43.436355] do_syscall_64+0x309/0x430 [ 43.440220] ? set_binfmt+0x1b0/0x1b0 [ 43.443997] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.449173] RIP: 0033:0x440b79 [ 43.452340] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 43.460023] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b79 [ 43.467267] RDX: 0000000020000180 RSI: 0000000020000280 RDI: 00000000200001c0 [ 43.474512] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 43.481763] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402310 [ 43.489007] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 43.496254] [ 43.497852] Uninit was stored to memory at: [ 43.502163] kmsan_internal_chain_origin+0x12b/0x210 [ 43.507254] kmsan_memcpy_origins+0x11d/0x170 [ 43.511721] __msan_memcpy+0x19f/0x1f0 [ 43.515586] _copy_to_iter+0xea2/0x28f0 [ 43.519536] copy_page_to_iter+0x383/0x1b70 [ 43.523835] shmem_file_read_iter+0x99f/0x1180 [ 43.528393] __vfs_read+0x6fb/0x8e0 [ 43.531996] vfs_read+0x36c/0x6c0 [ 43.535425] kernel_read+0x11f/0x1a0 [ 43.539115] prepare_binprm+0x982/0xad0 [ 43.543065] do_execveat_common+0x1b35/0x2ce0 [ 43.547536] SYSC_execve+0xe2/0x110 [ 43.551141] SyS_execve+0x56/0x80 [ 43.554571] do_syscall_64+0x309/0x430 [ 43.558434] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.563592] Uninit was created at: [ 43.567116] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 43.572106] kmsan_alloc_page+0x82/0xe0 [ 43.576054] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 43.580789] alloc_pages_vma+0xcc8/0x1800 [ 43.584912] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 43.589903] shmem_getpage_gfp+0x35db/0x5770 [ 43.594288] shmem_file_read_iter+0x508/0x1180 [ 43.598844] __vfs_read+0x6fb/0x8e0 [ 43.602443] vfs_read+0x36c/0x6c0 [ 43.605879] kernel_read+0x11f/0x1a0 [ 43.609576] prepare_binprm+0x982/0xad0 [ 43.613523] do_execveat_common+0x1b35/0x2ce0 [ 43.617991] SYSC_execve+0xe2/0x110 [ 43.621591] SyS_execve+0x56/0x80 [ 43.625017] do_syscall_64+0x309/0x430 [ 43.628880] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.634038] ================================================================== [ 43.641367] Disabling lock debugging due to kernel taint [ 43.646799] Kernel panic - not syncing: panic_on_warn set ... [ 43.646799] [ 43.654154] CPU: 1 PID: 3560 Comm: syzkaller263528 Tainted: G B 4.16.0+ #84 [ 43.662446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.671778] Call Trace: [ 43.674342] dump_stack+0x185/0x1d0 [ 43.677945] panic+0x39d/0x940 [ 43.681120] ? load_script+0x3ae/0xcd0 [ 43.684988] kmsan_report+0x238/0x240 [ 43.688767] __msan_warning_32+0x6c/0xb0 [ 43.692805] ? search_binary_handler+0x210/0xac0 [ 43.697536] load_script+0x3ae/0xcd0 [ 43.701233] ? bm_evict_inode+0x1a0/0x1a0 [ 43.705358] search_binary_handler+0x2ef/0xac0 [ 43.709917] do_execveat_common+0x1f4d/0x2ce0 [ 43.714394] SYSC_execve+0xe2/0x110 [ 43.717998] SyS_execve+0x56/0x80 [ 43.721428] do_syscall_64+0x309/0x430 [ 43.725292] ? set_binfmt+0x1b0/0x1b0 [ 43.729069] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.734240] RIP: 0033:0x440b79 [ 43.737406] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 43.745089] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b79 [ 43.752335] RDX: 0000000020000180 RSI: 0000000020000280 RDI: 00000000200001c0 [ 43.759580] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 43.766824] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402310 [ 43.774068] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 43.781713] Dumping ftrace buffer: [ 43.785228] (ftrace buffer empty) [ 43.788914] Kernel Offset: disabled [ 43.792516] Rebooting in 86400 seconds..