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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.905976] ================================================================== [ 53.913358] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 53.919216] CPU: 1 PID: 4500 Comm: syzkaller745628 Not tainted 4.16.0+ #85 [ 53.926201] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.935527] Call Trace: [ 53.938088] dump_stack+0x185/0x1d0 [ 53.941690] ? pointer+0x11e5/0x1410 [ 53.945377] kmsan_report+0x142/0x240 [ 53.949151] __msan_warning_32+0x6c/0xb0 [ 53.953188] ? futex_wait_queue_me+0x401/0x710 [ 53.957743] pointer+0x11e5/0x1410 [ 53.961259] ? futex_wait_queue_me+0x476/0x710 [ 53.965814] vsnprintf+0xa2d/0x33c0 [ 53.969417] seq_printf+0x29f/0x420 [ 53.973027] ? save_stack_trace_tsk+0x26a/0x2f0 [ 53.977672] ? futex_wait_queue_me+0x476/0x710 [ 53.982239] ? futex_wait_queue_me+0x476/0x710 [ 53.986798] ? futex_wait_queue_me+0x476/0x710 [ 53.991358] proc_pid_stack+0x326/0x470 [ 53.995313] proc_single_show+0x1af/0x300 [ 53.999439] ? proc_pid_wchan+0x250/0x250 [ 54.003564] ? proc_single_open+0x90/0x90 [ 54.007686] seq_read+0xc7d/0x2260 [ 54.011208] do_iter_read+0x880/0xd70 [ 54.014988] ? seq_open+0x360/0x360 [ 54.018587] do_readv+0x295/0x5f0 [ 54.022023] ? syscall_return_slowpath+0xe9/0x700 [ 54.026842] SYSC_readv+0x9b/0xb0 [ 54.030273] SyS_readv+0x56/0x80 [ 54.033612] do_syscall_64+0x309/0x430 [ 54.037475] ? vfs_readv+0x260/0x260 [ 54.041176] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 54.046339] RIP: 0033:0x445589 [ 54.049505] RSP: 002b:00007f0e1dcc6d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 54.057189] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445589 [ 54.064433] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 [ 54.071677] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 54.078933] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f0e1dcc6d20 [ 54.086180] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 54.093427] [ 54.095026] Uninit was stored to memory at: [ 54.099327] kmsan_internal_chain_origin+0x12b/0x210 [ 54.104404] __msan_chain_origin+0x69/0xc0 [ 54.108615] __save_stack_trace+0x829/0xb00 [ 54.112913] save_stack_trace_tsk+0x258/0x2f0 [ 54.117382] proc_pid_stack+0x26a/0x470 [ 54.121331] proc_single_show+0x1af/0x300 [ 54.125451] seq_read+0xc7d/0x2260 [ 54.128965] do_iter_read+0x880/0xd70 [ 54.132738] do_readv+0x295/0x5f0 [ 54.136163] SYSC_readv+0x9b/0xb0 [ 54.139602] SyS_readv+0x56/0x80 [ 54.142943] do_syscall_64+0x309/0x430 [ 54.146806] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 54.151965] Uninit was stored to memory at: [ 54.156259] kmsan_internal_chain_origin+0x12b/0x210 [ 54.161335] __msan_chain_origin+0x69/0xc0 [ 54.165548] update_stack_state+0x959/0xa40 [ 54.169850] unwind_next_frame+0x618/0xe50 [ 54.174073] __save_stack_trace+0x734/0xb00 [ 54.178381] save_stack_trace_tsk+0x258/0x2f0 [ 54.182853] proc_pid_stack+0x26a/0x470 [ 54.186800] proc_single_show+0x1af/0x300 [ 54.190920] seq_read+0xc7d/0x2260 [ 54.194438] do_iter_read+0x880/0xd70 [ 54.198211] do_readv+0x295/0x5f0 [ 54.201642] SYSC_readv+0x9b/0xb0 [ 54.205070] SyS_readv+0x56/0x80 [ 54.208421] do_syscall_64+0x309/0x430 [ 54.212308] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 54.217478] Local variable description: ----flags.i.i.i@rcu_all_qs [ 54.223765] Variable was created at: [ 54.227453] rcu_all_qs+0x32/0x1f0 [ 54.230968] _cond_resched+0x3c/0xd0 [ 54.234650] ================================================================== [ 54.241980] Disabling lock debugging due to kernel taint [ 54.247398] Kernel panic - not syncing: panic_on_warn set ... [ 54.247398] [ 54.254736] CPU: 1 PID: 4500 Comm: syzkaller745628 Tainted: G B 4.16.0+ #85 [ 54.263030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.272359] Call Trace: [ 54.274931] dump_stack+0x185/0x1d0 [ 54.278533] panic+0x39d/0x940 [ 54.281708] ? pointer+0x11e5/0x1410 [ 54.285394] kmsan_report+0x238/0x240 [ 54.289168] __msan_warning_32+0x6c/0xb0 [ 54.293204] ? futex_wait_queue_me+0x401/0x710 [ 54.297758] pointer+0x11e5/0x1410 [ 54.301274] ? futex_wait_queue_me+0x476/0x710 [ 54.305830] vsnprintf+0xa2d/0x33c0 [ 54.309436] seq_printf+0x29f/0x420 [ 54.313049] ? save_stack_trace_tsk+0x26a/0x2f0 [ 54.317697] ? futex_wait_queue_me+0x476/0x710 [ 54.322254] ? futex_wait_queue_me+0x476/0x710 [ 54.326809] ? futex_wait_queue_me+0x476/0x710 [ 54.331367] proc_pid_stack+0x326/0x470 [ 54.335319] proc_single_show+0x1af/0x300 [ 54.339441] ? proc_pid_wchan+0x250/0x250 [ 54.343562] ? proc_single_open+0x90/0x90 [ 54.347682] seq_read+0xc7d/0x2260 [ 54.351200] do_iter_read+0x880/0xd70 [ 54.354974] ? seq_open+0x360/0x360 [ 54.358574] do_readv+0x295/0x5f0 [ 54.362016] ? syscall_return_slowpath+0xe9/0x700 [ 54.366834] SYSC_readv+0x9b/0xb0 [ 54.370262] SyS_readv+0x56/0x80 [ 54.373602] do_syscall_64+0x309/0x430 [ 54.377465] ? vfs_readv+0x260/0x260 [ 54.381153] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 54.386314] RIP: 0033:0x445589 [ 54.389476] RSP: 002b:00007f0e1dcc6d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 54.397160] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445589 [ 54.404404] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 [ 54.411649] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 54.418895] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f0e1dcc6d20 [ 54.426137] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 54.433856] Dumping ftrace buffer: [ 54.437372] (ftrace buffer empty) [ 54.441061] Kernel Offset: disabled [ 54.444661] Rebooting in 86400 seconds..