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: [ 30.924181] ================================================================== [ 30.931558] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 30.937592] CPU: 0 PID: 3575 Comm: syzkaller515938 Not tainted 4.16.0+ #84 [ 30.944578] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.953907] Call Trace: [ 30.956470] dump_stack+0x185/0x1d0 [ 30.960072] ? load_script+0x3ae/0xcd0 [ 30.963935] kmsan_report+0x142/0x240 [ 30.967713] __msan_warning_32+0x6c/0xb0 [ 30.971751] ? search_binary_handler+0x210/0xac0 [ 30.976484] load_script+0x3ae/0xcd0 [ 30.980175] ? bm_evict_inode+0x1a0/0x1a0 [ 30.984297] search_binary_handler+0x2ef/0xac0 [ 30.988857] do_execveat_common+0x1f4d/0x2ce0 [ 30.993336] SYSC_execve+0xe2/0x110 [ 30.996940] SyS_execve+0x56/0x80 [ 31.000368] do_syscall_64+0x309/0x430 [ 31.004234] ? set_binfmt+0x1b0/0x1b0 [ 31.008012] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.013184] RIP: 0033:0x440bc9 [ 31.016346] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 31.024035] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440bc9 [ 31.031285] RDX: 0000000020000240 RSI: 0000000020000040 RDI: 0000000020000000 [ 31.038530] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 31.045775] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402360 [ 31.053021] R13: 00000000004023f0 R14: 0000000000000000 R15: 0000000000000000 [ 31.060265] [ 31.061865] Uninit was stored to memory at: [ 31.066162] kmsan_internal_chain_origin+0x12b/0x210 [ 31.071239] kmsan_memcpy_origins+0x11d/0x170 [ 31.075709] __msan_memcpy+0x19f/0x1f0 [ 31.079572] _copy_to_iter+0xea2/0x28f0 [ 31.083519] copy_page_to_iter+0x383/0x1b70 [ 31.087816] shmem_file_read_iter+0x99f/0x1180 [ 31.092372] __vfs_read+0x6fb/0x8e0 [ 31.095972] vfs_read+0x36c/0x6c0 [ 31.099399] kernel_read+0x11f/0x1a0 [ 31.103099] prepare_binprm+0x982/0xad0 [ 31.107069] do_execveat_common+0x1b35/0x2ce0 [ 31.111547] SYSC_execve+0xe2/0x110 [ 31.115148] SyS_execve+0x56/0x80 [ 31.118573] do_syscall_64+0x309/0x430 [ 31.122436] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.127597] Uninit was created at: [ 31.131121] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 31.136113] kmsan_alloc_page+0x82/0xe0 [ 31.140064] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 31.144800] alloc_pages_vma+0xcc8/0x1800 [ 31.148926] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 31.153916] shmem_getpage_gfp+0x35db/0x5770 [ 31.158298] shmem_file_read_iter+0x508/0x1180 [ 31.162855] __vfs_read+0x6fb/0x8e0 [ 31.166457] vfs_read+0x36c/0x6c0 [ 31.169884] kernel_read+0x11f/0x1a0 [ 31.173572] prepare_binprm+0x982/0xad0 [ 31.177521] do_execveat_common+0x1b35/0x2ce0 [ 31.181990] SYSC_execve+0xe2/0x110 [ 31.185592] SyS_execve+0x56/0x80 [ 31.189020] do_syscall_64+0x309/0x430 [ 31.192882] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.198040] ================================================================== [ 31.205369] Disabling lock debugging due to kernel taint [ 31.210789] Kernel panic - not syncing: panic_on_warn set ... [ 31.210789] [ 31.218126] CPU: 0 PID: 3575 Comm: syzkaller515938 Tainted: G B 4.16.0+ #84 [ 31.226412] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.235738] Call Trace: [ 31.238303] dump_stack+0x185/0x1d0 [ 31.241904] panic+0x39d/0x940 [ 31.245079] ? load_script+0x3ae/0xcd0 [ 31.248941] kmsan_report+0x238/0x240 [ 31.252718] __msan_warning_32+0x6c/0xb0 [ 31.256757] ? search_binary_handler+0x210/0xac0 [ 31.261488] load_script+0x3ae/0xcd0 [ 31.265178] ? bm_evict_inode+0x1a0/0x1a0 [ 31.269300] search_binary_handler+0x2ef/0xac0 [ 31.273860] do_execveat_common+0x1f4d/0x2ce0 [ 31.278338] SYSC_execve+0xe2/0x110 [ 31.281941] SyS_execve+0x56/0x80 [ 31.285370] do_syscall_64+0x309/0x430 [ 31.289232] ? set_binfmt+0x1b0/0x1b0 [ 31.293012] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.298175] RIP: 0033:0x440bc9 [ 31.301338] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 31.309021] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440bc9 [ 31.316267] RDX: 0000000020000240 RSI: 0000000020000040 RDI: 0000000020000000 [ 31.323514] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 31.330759] R10: 0000000120080522 R11: 0000000000000217 R12: 0000000000402360 [ 31.338013] R13: 00000000004023f0 R14: 0000000000000000 R15: 0000000000000000 [ 31.345703] Dumping ftrace buffer: [ 31.349225] (ftrace buffer empty) [ 31.352906] Kernel Offset: disabled [ 31.356506] Rebooting in 86400 seconds..