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 '10.128.0.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.243536] ================================================================== [ 30.250946] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 30.256989] CPU: 0 PID: 3580 Comm: syzkaller552687 Not tainted 4.16.0+ #84 [ 30.263979] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.273311] Call Trace: [ 30.275883] dump_stack+0x185/0x1d0 [ 30.279495] ? load_script+0x3ae/0xcd0 [ 30.283360] kmsan_report+0x142/0x240 [ 30.287140] __msan_warning_32+0x6c/0xb0 [ 30.291184] ? search_binary_handler+0x210/0xac0 [ 30.295918] load_script+0x3ae/0xcd0 [ 30.299614] ? bm_evict_inode+0x1a0/0x1a0 [ 30.303744] search_binary_handler+0x2ef/0xac0 [ 30.308311] do_execveat_common+0x1f4d/0x2ce0 [ 30.312792] SYSC_execve+0xe2/0x110 [ 30.316403] SyS_execve+0x56/0x80 [ 30.319838] do_syscall_64+0x309/0x430 [ 30.323711] ? set_binfmt+0x1b0/0x1b0 [ 30.327496] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.332667] RIP: 0033:0x440b69 [ 30.335835] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 30.343520] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b69 [ 30.350767] RDX: 0000000020000100 RSI: 0000000020000180 RDI: 0000000020000140 [ 30.358022] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 30.365280] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402300 [ 30.372537] R13: 0000000000402390 R14: 0000000000000000 R15: 0000000000000000 [ 30.379791] [ 30.381402] Uninit was stored to memory at: [ 30.385707] kmsan_internal_chain_origin+0x12b/0x210 [ 30.390808] kmsan_memcpy_origins+0x11d/0x170 [ 30.395281] __msan_memcpy+0x19f/0x1f0 [ 30.399153] _copy_to_iter+0xea2/0x28f0 [ 30.403109] copy_page_to_iter+0x383/0x1b70 [ 30.407418] shmem_file_read_iter+0x99f/0x1180 [ 30.411986] __vfs_read+0x6fb/0x8e0 [ 30.415598] vfs_read+0x36c/0x6c0 [ 30.419038] kernel_read+0x11f/0x1a0 [ 30.422731] prepare_binprm+0x982/0xad0 [ 30.426698] do_execveat_common+0x1b35/0x2ce0 [ 30.431171] SYSC_execve+0xe2/0x110 [ 30.434776] SyS_execve+0x56/0x80 [ 30.438207] do_syscall_64+0x309/0x430 [ 30.442093] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.447271] Uninit was created at: [ 30.450795] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 30.455797] kmsan_alloc_page+0x82/0xe0 [ 30.459753] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 30.464490] alloc_pages_vma+0xcc8/0x1800 [ 30.468619] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 30.473615] shmem_getpage_gfp+0x35db/0x5770 [ 30.478010] shmem_file_read_iter+0x508/0x1180 [ 30.482582] __vfs_read+0x6fb/0x8e0 [ 30.486195] vfs_read+0x36c/0x6c0 [ 30.489626] kernel_read+0x11f/0x1a0 [ 30.493320] prepare_binprm+0x982/0xad0 [ 30.497274] do_execveat_common+0x1b35/0x2ce0 [ 30.501760] SYSC_execve+0xe2/0x110 [ 30.505370] SyS_execve+0x56/0x80 [ 30.508809] do_syscall_64+0x309/0x430 [ 30.512680] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.517851] ================================================================== [ 30.525188] Disabling lock debugging due to kernel taint [ 30.530634] Kernel panic - not syncing: panic_on_warn set ... [ 30.530634] [ 30.537982] CPU: 0 PID: 3580 Comm: syzkaller552687 Tainted: G B 4.16.0+ #84 [ 30.546285] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.555619] Call Trace: [ 30.558193] dump_stack+0x185/0x1d0 [ 30.561802] panic+0x39d/0x940 [ 30.564985] ? load_script+0x3ae/0xcd0 [ 30.568850] kmsan_report+0x238/0x240 [ 30.572637] __msan_warning_32+0x6c/0xb0 [ 30.576682] ? search_binary_handler+0x210/0xac0 [ 30.581420] load_script+0x3ae/0xcd0 [ 30.585114] ? bm_evict_inode+0x1a0/0x1a0 [ 30.589242] search_binary_handler+0x2ef/0xac0 [ 30.593809] do_execveat_common+0x1f4d/0x2ce0 [ 30.598301] SYSC_execve+0xe2/0x110 [ 30.601908] SyS_execve+0x56/0x80 [ 30.605348] do_syscall_64+0x309/0x430 [ 30.609222] ? set_binfmt+0x1b0/0x1b0 [ 30.613012] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.618203] RIP: 0033:0x440b69 [ 30.621377] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 30.629076] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b69 [ 30.636327] RDX: 0000000020000100 RSI: 0000000020000180 RDI: 0000000020000140 [ 30.643578] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 30.650831] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402300 [ 30.658088] R13: 0000000000402390 R14: 0000000000000000 R15: 0000000000000000 [ 30.665966] Dumping ftrace buffer: [ 30.669490] (ftrace buffer empty) [ 30.673187] Kernel Offset: disabled [ 30.676790] Rebooting in 86400 seconds..