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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.723344] ================================================================== [ 32.730746] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 32.736788] CPU: 1 PID: 3582 Comm: syzkaller074693 Not tainted 4.16.0+ #82 [ 32.743775] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.753277] Call Trace: [ 32.755858] dump_stack+0x185/0x1d0 [ 32.759464] ? load_script+0x3ae/0xcd0 [ 32.763333] kmsan_report+0x142/0x240 [ 32.767124] __msan_warning_32+0x6c/0xb0 [ 32.771171] ? search_binary_handler+0x220/0xac0 [ 32.775899] load_script+0x3ae/0xcd0 [ 32.779589] ? bm_evict_inode+0x1a0/0x1a0 [ 32.783717] search_binary_handler+0x2ef/0xac0 [ 32.788282] do_execveat_common+0x1f4d/0x2ce0 [ 32.792855] SYSC_execve+0xe2/0x110 [ 32.796461] SyS_execve+0x56/0x80 [ 32.799891] do_syscall_64+0x309/0x430 [ 32.803756] ? set_binfmt+0x1b0/0x1b0 [ 32.807543] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 32.812800] RIP: 0033:0x440b39 [ 32.815967] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 32.823651] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b39 [ 32.830898] RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 0000000020000000 [ 32.838151] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 32.845395] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000004022d0 [ 32.852657] R13: 0000000000402360 R14: 0000000000000000 R15: 0000000000000000 [ 32.859908] [ 32.861514] Uninit was stored to memory at: [ 32.865816] kmsan_internal_chain_origin+0x12b/0x210 [ 32.870896] kmsan_memcpy_origins+0x11d/0x170 [ 32.875365] __msan_memcpy+0x19f/0x1f0 [ 32.879227] _copy_to_iter+0xea2/0x28f0 [ 32.883175] copy_page_to_iter+0x383/0x1b70 [ 32.887485] shmem_file_read_iter+0x99f/0x1180 [ 32.892049] __vfs_read+0x6fb/0x8e0 [ 32.895652] vfs_read+0x36c/0x6c0 [ 32.899084] kernel_read+0x11f/0x1a0 [ 32.902795] prepare_binprm+0x982/0xad0 [ 32.906746] do_execveat_common+0x1b35/0x2ce0 [ 32.911223] SYSC_execve+0xe2/0x110 [ 32.914833] SyS_execve+0x56/0x80 [ 32.918261] do_syscall_64+0x309/0x430 [ 32.922128] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 32.927289] Uninit was created at: [ 32.930808] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 32.935799] kmsan_alloc_page+0x82/0xe0 [ 32.939749] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 32.944480] alloc_pages_vma+0xcc8/0x1800 [ 32.948611] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 32.953604] shmem_getpage_gfp+0x35db/0x5770 [ 32.957988] shmem_file_read_iter+0x508/0x1180 [ 32.962555] __vfs_read+0x6fb/0x8e0 [ 32.966156] vfs_read+0x36c/0x6c0 [ 32.969582] kernel_read+0x11f/0x1a0 [ 32.973278] prepare_binprm+0x982/0xad0 [ 32.977241] do_execveat_common+0x1b35/0x2ce0 [ 32.981719] SYSC_execve+0xe2/0x110 [ 32.985321] SyS_execve+0x56/0x80 [ 32.988749] do_syscall_64+0x309/0x430 [ 32.992618] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 32.997779] ================================================================== [ 33.005122] Disabling lock debugging due to kernel taint [ 33.010726] Kernel panic - not syncing: panic_on_warn set ... [ 33.010726] [ 33.018071] CPU: 1 PID: 3582 Comm: syzkaller074693 Tainted: G B 4.16.0+ #82 [ 33.026358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.035777] Call Trace: [ 33.038348] dump_stack+0x185/0x1d0 [ 33.041952] panic+0x39d/0x940 [ 33.045130] ? load_script+0x3ae/0xcd0 [ 33.048996] kmsan_report+0x238/0x240 [ 33.052786] __msan_warning_32+0x6c/0xb0 [ 33.056830] ? search_binary_handler+0x220/0xac0 [ 33.061562] load_script+0x3ae/0xcd0 [ 33.065253] ? bm_evict_inode+0x1a0/0x1a0 [ 33.069379] search_binary_handler+0x2ef/0xac0 [ 33.073942] do_execveat_common+0x1f4d/0x2ce0 [ 33.078422] SYSC_execve+0xe2/0x110 [ 33.082041] SyS_execve+0x56/0x80 [ 33.085482] do_syscall_64+0x309/0x430 [ 33.089363] ? set_binfmt+0x1b0/0x1b0 [ 33.093151] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 33.098321] RIP: 0033:0x440b39 [ 33.101487] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 33.109178] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440b39 [ 33.116431] RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 0000000020000000 [ 33.124370] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 33.131630] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000004022d0 [ 33.138899] R13: 0000000000402360 R14: 0000000000000000 R15: 0000000000000000 [ 33.146640] Dumping ftrace buffer: [ 33.150160] (ftrace buffer empty) [ 33.153842] Kernel Offset: disabled [ 33.157445] Rebooting in 86400 seconds..