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 '10.128.10.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.038205] ================================================================== [ 31.045573] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 31.051604] CPU: 0 PID: 3577 Comm: syzkaller546850 Not tainted 4.16.0+ #83 [ 31.058585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.067911] Call Trace: [ 31.070477] dump_stack+0x185/0x1d0 [ 31.074081] ? load_script+0x3ae/0xcd0 [ 31.077941] kmsan_report+0x142/0x240 [ 31.081715] __msan_warning_32+0x6c/0xb0 [ 31.085748] ? search_binary_handler+0x220/0xac0 [ 31.090475] load_script+0x3ae/0xcd0 [ 31.094162] ? bm_evict_inode+0x1a0/0x1a0 [ 31.098287] search_binary_handler+0x2ef/0xac0 [ 31.102844] do_execveat_common+0x1f4d/0x2ce0 [ 31.107317] SYSC_execve+0xe2/0x110 [ 31.110919] SyS_execve+0x56/0x80 [ 31.114347] do_syscall_64+0x309/0x430 [ 31.118207] ? set_binfmt+0x1b0/0x1b0 [ 31.121982] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.127143] RIP: 0033:0x440b79 [ 31.130304] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 31.137982] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b79 [ 31.145229] RDX: 00000000200001c0 RSI: 0000000020000040 RDI: 00000000200000c0 [ 31.152482] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 31.159725] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402310 [ 31.166966] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 31.174210] [ 31.175807] Uninit was stored to memory at: [ 31.180104] kmsan_internal_chain_origin+0x12b/0x210 [ 31.185178] kmsan_memcpy_origins+0x11d/0x170 [ 31.189648] __msan_memcpy+0x19f/0x1f0 [ 31.193508] _copy_to_iter+0xea2/0x28f0 [ 31.197452] copy_page_to_iter+0x383/0x1b70 [ 31.201747] shmem_file_read_iter+0x99f/0x1180 [ 31.206303] __vfs_read+0x6fb/0x8e0 [ 31.209904] vfs_read+0x36c/0x6c0 [ 31.213331] kernel_read+0x11f/0x1a0 [ 31.217021] prepare_binprm+0x982/0xad0 [ 31.220977] do_execveat_common+0x1b35/0x2ce0 [ 31.225446] SYSC_execve+0xe2/0x110 [ 31.229066] SyS_execve+0x56/0x80 [ 31.232510] do_syscall_64+0x309/0x430 [ 31.236373] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.241530] Uninit was created at: [ 31.245060] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 31.250552] kmsan_alloc_page+0x82/0xe0 [ 31.254502] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 31.259243] alloc_pages_vma+0xcc8/0x1800 [ 31.263376] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 31.268382] shmem_getpage_gfp+0x35db/0x5770 [ 31.272769] shmem_file_read_iter+0x508/0x1180 [ 31.277328] __vfs_read+0x6fb/0x8e0 [ 31.280938] vfs_read+0x36c/0x6c0 [ 31.284374] kernel_read+0x11f/0x1a0 [ 31.288074] prepare_binprm+0x982/0xad0 [ 31.292032] do_execveat_common+0x1b35/0x2ce0 [ 31.296516] SYSC_execve+0xe2/0x110 [ 31.300118] SyS_execve+0x56/0x80 [ 31.303545] do_syscall_64+0x309/0x430 [ 31.307410] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.312566] ================================================================== [ 31.319896] Disabling lock debugging due to kernel taint [ 31.325314] Kernel panic - not syncing: panic_on_warn set ... [ 31.325314] [ 31.332652] CPU: 0 PID: 3577 Comm: syzkaller546850 Tainted: G B 4.16.0+ #83 [ 31.340937] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.350263] Call Trace: [ 31.352826] dump_stack+0x185/0x1d0 [ 31.356428] panic+0x39d/0x940 [ 31.359606] ? load_script+0x3ae/0xcd0 [ 31.363466] kmsan_report+0x238/0x240 [ 31.367240] __msan_warning_32+0x6c/0xb0 [ 31.371275] ? search_binary_handler+0x220/0xac0 [ 31.376002] load_script+0x3ae/0xcd0 [ 31.379691] ? bm_evict_inode+0x1a0/0x1a0 [ 31.383811] search_binary_handler+0x2ef/0xac0 [ 31.388385] do_execveat_common+0x1f4d/0x2ce0 [ 31.392860] SYSC_execve+0xe2/0x110 [ 31.396463] SyS_execve+0x56/0x80 [ 31.399889] do_syscall_64+0x309/0x430 [ 31.403750] ? set_binfmt+0x1b0/0x1b0 [ 31.407528] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.412688] RIP: 0033:0x440b79 [ 31.415853] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 31.423539] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b79 [ 31.430784] RDX: 00000000200001c0 RSI: 0000000020000040 RDI: 00000000200000c0 [ 31.438028] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 31.445275] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402310 [ 31.452518] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 31.460210] Dumping ftrace buffer: [ 31.463724] (ftrace buffer empty) [ 31.467403] Kernel Offset: disabled [ 31.471003] Rebooting in 86400 seconds..