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 '10.128.0.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.274685] ================================================================== [ 30.282091] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 30.288145] CPU: 0 PID: 3581 Comm: syzkaller208553 Not tainted 4.16.0+ #82 [ 30.295136] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.304471] Call Trace: [ 30.307053] dump_stack+0x185/0x1d0 [ 30.310667] ? load_script+0x3ae/0xcd0 [ 30.314543] kmsan_report+0x142/0x240 [ 30.318322] __msan_warning_32+0x6c/0xb0 [ 30.322363] ? search_binary_handler+0x220/0xac0 [ 30.327107] load_script+0x3ae/0xcd0 [ 30.330806] ? bm_evict_inode+0x1a0/0x1a0 [ 30.334939] search_binary_handler+0x2ef/0xac0 [ 30.339505] do_execveat_common+0x1f4d/0x2ce0 [ 30.343988] SYSC_execveat+0x149/0x170 [ 30.347857] SyS_execveat+0x76/0xa0 [ 30.351462] do_syscall_64+0x309/0x430 [ 30.355332] ? SYSC_execve+0x110/0x110 [ 30.359211] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.364378] RIP: 0033:0x43fd09 [ 30.367546] RSP: 002b:00007fff0d147b28 EFLAGS: 00000217 ORIG_RAX: 0000000000000142 [ 30.375230] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd09 [ 30.382479] RDX: 00000000200f9000 RSI: 0000000020006000 RDI: 0000000000000003 [ 30.389730] RBP: 00000000006ca018 R08: 0000000000001000 R09: 00000000004002c8 [ 30.396978] R10: 0000000020006000 R11: 0000000000000217 R12: 0000000000401630 [ 30.404225] R13: 00000000004016c0 R14: 0000000000000000 R15: 0000000000000000 [ 30.411479] [ 30.413082] Uninit was stored to memory at: [ 30.417385] kmsan_internal_chain_origin+0x12b/0x210 [ 30.422466] kmsan_memcpy_origins+0x11d/0x170 [ 30.426941] __msan_memcpy+0x19f/0x1f0 [ 30.430817] _copy_to_iter+0xea2/0x28f0 [ 30.434768] copy_page_to_iter+0x383/0x1b70 [ 30.439079] shmem_file_read_iter+0x99f/0x1180 [ 30.443649] __vfs_read+0x6fb/0x8e0 [ 30.447254] vfs_read+0x36c/0x6c0 [ 30.450685] kernel_read+0x11f/0x1a0 [ 30.454377] prepare_binprm+0x982/0xad0 [ 30.458330] do_execveat_common+0x1b35/0x2ce0 [ 30.462804] SYSC_execveat+0x149/0x170 [ 30.466671] SyS_execveat+0x76/0xa0 [ 30.470287] do_syscall_64+0x309/0x430 [ 30.474153] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.479319] Uninit was created at: [ 30.482853] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 30.487873] kmsan_alloc_page+0x82/0xe0 [ 30.491826] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 30.496560] alloc_pages_vma+0xcc8/0x1800 [ 30.500684] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 30.505676] shmem_getpage_gfp+0x35db/0x5770 [ 30.510061] shmem_file_read_iter+0x508/0x1180 [ 30.514626] __vfs_read+0x6fb/0x8e0 [ 30.518245] vfs_read+0x36c/0x6c0 [ 30.521691] kernel_read+0x11f/0x1a0 [ 30.525386] prepare_binprm+0x982/0xad0 [ 30.529336] do_execveat_common+0x1b35/0x2ce0 [ 30.533811] SYSC_execveat+0x149/0x170 [ 30.537689] SyS_execveat+0x76/0xa0 [ 30.541292] do_syscall_64+0x309/0x430 [ 30.545158] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.550320] ================================================================== [ 30.557651] Disabling lock debugging due to kernel taint [ 30.563076] Kernel panic - not syncing: panic_on_warn set ... [ 30.563076] [ 30.570421] CPU: 0 PID: 3581 Comm: syzkaller208553 Tainted: G B 4.16.0+ #82 [ 30.578713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.588050] Call Trace: [ 30.590632] dump_stack+0x185/0x1d0 [ 30.594238] panic+0x39d/0x940 [ 30.597430] ? load_script+0x3ae/0xcd0 [ 30.601297] kmsan_report+0x238/0x240 [ 30.605085] __msan_warning_32+0x6c/0xb0 [ 30.609127] ? search_binary_handler+0x220/0xac0 [ 30.613860] load_script+0x3ae/0xcd0 [ 30.617560] ? bm_evict_inode+0x1a0/0x1a0 [ 30.621687] search_binary_handler+0x2ef/0xac0 [ 30.626250] do_execveat_common+0x1f4d/0x2ce0 [ 30.630730] SYSC_execveat+0x149/0x170 [ 30.634597] SyS_execveat+0x76/0xa0 [ 30.638206] do_syscall_64+0x309/0x430 [ 30.642077] ? SYSC_execve+0x110/0x110 [ 30.645947] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.651115] RIP: 0033:0x43fd09 [ 30.654304] RSP: 002b:00007fff0d147b28 EFLAGS: 00000217 ORIG_RAX: 0000000000000142 [ 30.661989] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd09 [ 30.669238] RDX: 00000000200f9000 RSI: 0000000020006000 RDI: 0000000000000003 [ 30.676487] RBP: 00000000006ca018 R08: 0000000000001000 R09: 00000000004002c8 [ 30.683745] R10: 0000000020006000 R11: 0000000000000217 R12: 0000000000401630 [ 30.691010] R13: 00000000004016c0 R14: 0000000000000000 R15: 0000000000000000 [ 30.698731] Dumping ftrace buffer: [ 30.702254] (ftrace buffer empty) [ 30.705937] Kernel Offset: disabled [ 30.709558] Rebooting in 86400 seconds..