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 '10.128.10.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.043070] ================================================================== [ 43.050492] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 43.056363] CPU: 1 PID: 4539 Comm: syzkaller452775 Not tainted 4.16.0+ #87 [ 43.063359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.072693] Call Trace: [ 43.075270] dump_stack+0x185/0x1d0 [ 43.078881] ? pointer+0x11e5/0x1410 [ 43.082575] kmsan_report+0x142/0x240 [ 43.086363] __msan_warning_32+0x6c/0xb0 [ 43.090406] ? futex_wait_queue_me+0x401/0x710 [ 43.094965] pointer+0x11e5/0x1410 [ 43.098488] ? futex_wait_queue_me+0x476/0x710 [ 43.103054] vsnprintf+0xa2d/0x33c0 [ 43.106666] seq_printf+0x29f/0x420 [ 43.110280] ? save_stack_trace_tsk+0x26a/0x2f0 [ 43.114939] ? futex_wait_queue_me+0x476/0x710 [ 43.119503] ? futex_wait_queue_me+0x476/0x710 [ 43.124068] ? futex_wait_queue_me+0x476/0x710 [ 43.128630] proc_pid_stack+0x326/0x470 [ 43.132592] proc_single_show+0x1af/0x300 [ 43.136727] ? proc_pid_wchan+0x250/0x250 [ 43.140853] ? proc_single_open+0x90/0x90 [ 43.144979] seq_read+0xc7d/0x2260 [ 43.148506] ? __vfs_read+0xc9/0x9b0 [ 43.152207] ? seq_open+0x360/0x360 [ 43.155818] __vfs_read+0x1a5/0x9b0 [ 43.159428] vfs_read+0x36c/0x6c0 [ 43.162865] SYSC_pread64+0x275/0x310 [ 43.166649] SyS_pread64+0x65/0x90 [ 43.170171] do_syscall_64+0x309/0x430 [ 43.174046] ? SYSC_write+0x360/0x360 [ 43.177832] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.183001] RIP: 0033:0x445519 [ 43.186177] RSP: 002b:00007fc7473b3d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 43.193867] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 43.201119] RDX: 00000000fffffe7a RSI: 0000000020000000 RDI: 0000000000000003 [ 43.208380] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 43.215631] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc7473b3d20 [ 43.222882] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 43.230135] [ 43.231739] Uninit was stored to memory at: [ 43.236049] kmsan_internal_chain_origin+0x12b/0x210 [ 43.241138] __msan_chain_origin+0x69/0xc0 [ 43.245357] __save_stack_trace+0x829/0xb00 [ 43.249660] save_stack_trace_tsk+0x258/0x2f0 [ 43.254139] proc_pid_stack+0x26a/0x470 [ 43.258093] proc_single_show+0x1af/0x300 [ 43.262221] seq_read+0xc7d/0x2260 [ 43.265740] __vfs_read+0x1a5/0x9b0 [ 43.269352] vfs_read+0x36c/0x6c0 [ 43.272800] SYSC_pread64+0x275/0x310 [ 43.276585] SyS_pread64+0x65/0x90 [ 43.280106] do_syscall_64+0x309/0x430 [ 43.283975] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.289139] Uninit was stored to memory at: [ 43.293466] kmsan_internal_chain_origin+0x12b/0x210 [ 43.298551] __msan_chain_origin+0x69/0xc0 [ 43.302877] update_stack_state+0x959/0xa40 [ 43.307181] unwind_next_frame+0x618/0xe50 [ 43.311399] __save_stack_trace+0x734/0xb00 [ 43.315715] save_stack_trace_tsk+0x258/0x2f0 [ 43.320205] proc_pid_stack+0x26a/0x470 [ 43.324160] proc_single_show+0x1af/0x300 [ 43.328288] seq_read+0xc7d/0x2260 [ 43.331808] __vfs_read+0x1a5/0x9b0 [ 43.335415] vfs_read+0x36c/0x6c0 [ 43.338849] SYSC_pread64+0x275/0x310 [ 43.342628] SyS_pread64+0x65/0x90 [ 43.346151] do_syscall_64+0x309/0x430 [ 43.350029] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.355198] Local variable description: ----flags.i.i.i@rcu_all_qs [ 43.361492] Variable was created at: [ 43.365204] rcu_all_qs+0x32/0x1f0 [ 43.368725] _cond_resched+0x3c/0xd0 [ 43.372422] ================================================================== [ 43.379758] Disabling lock debugging due to kernel taint [ 43.385186] Kernel panic - not syncing: panic_on_warn set ... [ 43.385186] [ 43.392533] CPU: 1 PID: 4539 Comm: syzkaller452775 Tainted: G B 4.16.0+ #87 [ 43.400827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.410161] Call Trace: [ 43.412733] dump_stack+0x185/0x1d0 [ 43.416345] panic+0x39d/0x940 [ 43.419525] ? pointer+0x11e5/0x1410 [ 43.423219] kmsan_report+0x238/0x240 [ 43.427003] __msan_warning_32+0x6c/0xb0 [ 43.431058] ? futex_wait_queue_me+0x401/0x710 [ 43.435621] pointer+0x11e5/0x1410 [ 43.439146] ? futex_wait_queue_me+0x476/0x710 [ 43.443719] vsnprintf+0xa2d/0x33c0 [ 43.447338] seq_printf+0x29f/0x420 [ 43.450961] ? save_stack_trace_tsk+0x26a/0x2f0 [ 43.455610] ? futex_wait_queue_me+0x476/0x710 [ 43.460172] ? futex_wait_queue_me+0x476/0x710 [ 43.464737] ? futex_wait_queue_me+0x476/0x710 [ 43.469303] proc_pid_stack+0x326/0x470 [ 43.473262] proc_single_show+0x1af/0x300 [ 43.477392] ? proc_pid_wchan+0x250/0x250 [ 43.481523] ? proc_single_open+0x90/0x90 [ 43.485652] seq_read+0xc7d/0x2260 [ 43.489177] ? __vfs_read+0xc9/0x9b0 [ 43.492869] ? seq_open+0x360/0x360 [ 43.496483] __vfs_read+0x1a5/0x9b0 [ 43.500094] vfs_read+0x36c/0x6c0 [ 43.503529] SYSC_pread64+0x275/0x310 [ 43.507311] SyS_pread64+0x65/0x90 [ 43.510832] do_syscall_64+0x309/0x430 [ 43.514699] ? SYSC_write+0x360/0x360 [ 43.518482] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.523649] RIP: 0033:0x445519 [ 43.526817] RSP: 002b:00007fc7473b3d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 43.534503] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 43.541754] RDX: 00000000fffffe7a RSI: 0000000020000000 RDI: 0000000000000003 [ 43.549006] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 43.556264] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc7473b3d20 [ 43.563511] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 43.571244] Dumping ftrace buffer: [ 43.574766] (ftrace buffer empty) [ 43.578454] Kernel Offset: disabled [ 43.582060] Rebooting in 86400 seconds..