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 '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.576052] ================================================================== [ 41.583442] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 41.589308] CPU: 1 PID: 4454 Comm: syzkaller069868 Not tainted 4.16.0+ #85 [ 41.596290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.605619] Call Trace: [ 41.608183] dump_stack+0x185/0x1d0 [ 41.611784] ? pointer+0x11e5/0x1410 [ 41.615485] kmsan_report+0x142/0x240 [ 41.619271] __msan_warning_32+0x6c/0xb0 [ 41.623311] ? proc_pid_stack+0x1e1/0x470 [ 41.627432] pointer+0x11e5/0x1410 [ 41.630949] ? proc_pid_stack+0x26a/0x470 [ 41.635083] vsnprintf+0xa2d/0x33c0 [ 41.638700] seq_printf+0x29f/0x420 [ 41.642313] ? save_stack_trace_tsk+0x26a/0x2f0 [ 41.646957] ? proc_pid_stack+0x26a/0x470 [ 41.651092] ? proc_pid_stack+0x26a/0x470 [ 41.655228] ? proc_pid_stack+0x26a/0x470 [ 41.659349] proc_pid_stack+0x326/0x470 [ 41.663302] proc_single_show+0x1af/0x300 [ 41.667427] ? proc_pid_wchan+0x250/0x250 [ 41.671549] ? proc_single_open+0x90/0x90 [ 41.675669] seq_read+0xc7d/0x2260 [ 41.679193] do_iter_read+0x880/0xd70 [ 41.682973] ? seq_open+0x360/0x360 [ 41.686576] vfs_readv+0x1ec/0x260 [ 41.690098] default_file_splice_read+0xa9a/0x1120 [ 41.695017] ? SYSC_tee+0x13d0/0x13d0 [ 41.698801] splice_direct_to_actor+0x4c6/0x1040 [ 41.703532] ? do_splice_direct+0x540/0x540 [ 41.707829] ? security_file_permission+0x28f/0x4b0 [ 41.712825] ? rw_verify_area+0x35e/0x580 [ 41.716949] do_splice_direct+0x335/0x540 [ 41.721074] do_sendfile+0x1067/0x1e40 [ 41.724940] SYSC_sendfile64+0x1b3/0x300 [ 41.728978] SyS_sendfile64+0x64/0x90 [ 41.732757] do_syscall_64+0x309/0x430 [ 41.736622] ? SYSC_sendfile+0x320/0x320 [ 41.740660] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.745823] RIP: 0033:0x443e09 [ 41.748989] RSP: 002b:00007ffe6bdb9b48 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 41.756671] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e09 [ 41.763917] RDX: 0000000020000100 RSI: 0000000000000003 RDI: 0000000000000004 [ 41.771167] RBP: 00000000006ce018 R08: 0000000000000010 R09: 65732f636f72702f [ 41.778413] R10: 0000000080000003 R11: 0000000000000217 R12: 0000000000401ab0 [ 41.785661] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 41.792906] [ 41.794505] Uninit was stored to memory at: [ 41.798804] kmsan_internal_chain_origin+0x12b/0x210 [ 41.803881] __msan_chain_origin+0x69/0xc0 [ 41.808095] __save_stack_trace+0x829/0xb00 [ 41.812394] save_stack_trace_tsk+0x258/0x2f0 [ 41.816865] proc_pid_stack+0x26a/0x470 [ 41.820816] proc_single_show+0x1af/0x300 [ 41.824941] seq_read+0xc7d/0x2260 [ 41.828458] do_iter_read+0x880/0xd70 [ 41.832236] vfs_readv+0x1ec/0x260 [ 41.835753] default_file_splice_read+0xa9a/0x1120 [ 41.840657] splice_direct_to_actor+0x4c6/0x1040 [ 41.845388] do_splice_direct+0x335/0x540 [ 41.849508] do_sendfile+0x1067/0x1e40 [ 41.853372] SYSC_sendfile64+0x1b3/0x300 [ 41.857406] SyS_sendfile64+0x64/0x90 [ 41.861181] do_syscall_64+0x309/0x430 [ 41.865048] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.870209] Uninit was stored to memory at: [ 41.874507] kmsan_internal_chain_origin+0x12b/0x210 [ 41.879588] __msan_chain_origin+0x69/0xc0 [ 41.883799] update_stack_state+0x959/0xa40 [ 41.888098] unwind_next_frame+0x618/0xe50 [ 41.892307] __save_stack_trace+0x734/0xb00 [ 41.896607] save_stack_trace_tsk+0x258/0x2f0 [ 41.901079] proc_pid_stack+0x26a/0x470 [ 41.905027] proc_single_show+0x1af/0x300 [ 41.909151] seq_read+0xc7d/0x2260 [ 41.912665] do_iter_read+0x880/0xd70 [ 41.916439] vfs_readv+0x1ec/0x260 [ 41.919955] default_file_splice_read+0xa9a/0x1120 [ 41.924857] splice_direct_to_actor+0x4c6/0x1040 [ 41.929584] do_splice_direct+0x335/0x540 [ 41.933710] do_sendfile+0x1067/0x1e40 [ 41.937569] SYSC_sendfile64+0x1b3/0x300 [ 41.941604] SyS_sendfile64+0x64/0x90 [ 41.945378] do_syscall_64+0x309/0x430 [ 41.949241] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.954400] Local variable description: ----wait.i@try_charge [ 41.960253] Variable was created at: [ 41.963946] try_charge+0x105/0x2fd0 [ 41.967632] mem_cgroup_try_charge+0xa80/0xf00 [ 41.972183] ================================================================== [ 41.979527] Disabling lock debugging due to kernel taint [ 41.984949] Kernel panic - not syncing: panic_on_warn set ... [ 41.984949] [ 41.992286] CPU: 1 PID: 4454 Comm: syzkaller069868 Tainted: G B 4.16.0+ #85 [ 42.000571] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.009900] Call Trace: [ 42.012464] dump_stack+0x185/0x1d0 [ 42.016072] panic+0x39d/0x940 [ 42.019251] ? pointer+0x11e5/0x1410 [ 42.022937] kmsan_report+0x238/0x240 [ 42.026715] __msan_warning_32+0x6c/0xb0 [ 42.030752] ? proc_pid_stack+0x1e1/0x470 [ 42.034875] pointer+0x11e5/0x1410 [ 42.038391] ? proc_pid_stack+0x26a/0x470 [ 42.042513] vsnprintf+0xa2d/0x33c0 [ 42.046122] seq_printf+0x29f/0x420 [ 42.049737] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.054381] ? proc_pid_stack+0x26a/0x470 [ 42.058504] ? proc_pid_stack+0x26a/0x470 [ 42.062626] ? proc_pid_stack+0x26a/0x470 [ 42.066749] proc_pid_stack+0x326/0x470 [ 42.070704] proc_single_show+0x1af/0x300 [ 42.074828] ? proc_pid_wchan+0x250/0x250 [ 42.078953] ? proc_single_open+0x90/0x90 [ 42.083082] seq_read+0xc7d/0x2260 [ 42.086622] do_iter_read+0x880/0xd70 [ 42.090399] ? seq_open+0x360/0x360 [ 42.094002] vfs_readv+0x1ec/0x260 [ 42.097523] default_file_splice_read+0xa9a/0x1120 [ 42.102438] ? SYSC_tee+0x13d0/0x13d0 [ 42.106214] splice_direct_to_actor+0x4c6/0x1040 [ 42.110946] ? do_splice_direct+0x540/0x540 [ 42.115243] ? security_file_permission+0x28f/0x4b0 [ 42.120239] ? rw_verify_area+0x35e/0x580 [ 42.124366] do_splice_direct+0x335/0x540 [ 42.128494] do_sendfile+0x1067/0x1e40 [ 42.132364] SYSC_sendfile64+0x1b3/0x300 [ 42.136400] SyS_sendfile64+0x64/0x90 [ 42.140179] do_syscall_64+0x309/0x430 [ 42.144043] ? SYSC_sendfile+0x320/0x320 [ 42.148080] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.153243] RIP: 0033:0x443e09 [ 42.156409] RSP: 002b:00007ffe6bdb9b48 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 42.164094] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e09 [ 42.171338] RDX: 0000000020000100 RSI: 0000000000000003 RDI: 0000000000000004 [ 42.178583] RBP: 00000000006ce018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.185828] R10: 0000000080000003 R11: 0000000000000217 R12: 0000000000401ab0 [ 42.193073] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 42.200842] Dumping ftrace buffer: [ 42.204362] (ftrace buffer empty) [ 42.208044] Kernel Offset: disabled [ 42.211644] Rebooting in 86400 seconds..