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 '10.128.0.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.073219] ================================================================== [ 40.080611] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 40.086485] CPU: 0 PID: 4502 Comm: syz-executor707 Not tainted 4.16.0+ #87 [ 40.093561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.102890] Call Trace: [ 40.105460] dump_stack+0x185/0x1d0 [ 40.109064] ? pointer+0x11e5/0x1410 [ 40.112763] kmsan_report+0x142/0x240 [ 40.116549] __msan_warning_32+0x6c/0xb0 [ 40.120589] ? proc_pid_stack+0x251/0x470 [ 40.124711] pointer+0x11e5/0x1410 [ 40.128229] ? proc_pid_stack+0x26a/0x470 [ 40.132355] vsnprintf+0xa2d/0x33c0 [ 40.135970] seq_printf+0x29f/0x420 [ 40.139581] ? save_stack_trace_tsk+0x26a/0x2f0 [ 40.144228] ? proc_pid_stack+0x26a/0x470 [ 40.148371] ? proc_pid_stack+0x26a/0x470 [ 40.152500] ? proc_pid_stack+0x26a/0x470 [ 40.156624] proc_pid_stack+0x326/0x470 [ 40.160579] proc_single_show+0x1af/0x300 [ 40.164703] ? proc_pid_wchan+0x250/0x250 [ 40.168829] ? proc_single_open+0x90/0x90 [ 40.172952] seq_read+0xc7d/0x2260 [ 40.176478] do_iter_read+0x880/0xd70 [ 40.180258] ? seq_open+0x360/0x360 [ 40.183866] vfs_readv+0x1ec/0x260 [ 40.187387] default_file_splice_read+0xa9a/0x1120 [ 40.192304] ? SYSC_tee+0x13d0/0x13d0 [ 40.196087] splice_direct_to_actor+0x4c6/0x1040 [ 40.200827] ? do_splice_direct+0x540/0x540 [ 40.205127] ? security_file_permission+0x28f/0x4b0 [ 40.210127] ? rw_verify_area+0x35e/0x580 [ 40.214253] do_splice_direct+0x335/0x540 [ 40.218387] do_sendfile+0x1067/0x1e40 [ 40.222269] SYSC_sendfile64+0x1b3/0x300 [ 40.226313] SyS_sendfile64+0x64/0x90 [ 40.230098] do_syscall_64+0x309/0x430 [ 40.233966] ? SYSC_sendfile+0x320/0x320 [ 40.238007] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.243171] RIP: 0033:0x4400c9 [ 40.246337] RSP: 002b:00007ffd5ba265b8 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 40.254027] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400c9 [ 40.261274] RDX: 0000000020014000 RSI: 0000000000000003 RDI: 0000000000000004 [ 40.268524] RBP: 00000000006ca018 R08: 65732f636f72702f R09: 65732f636f72702f [ 40.275781] R10: 0000004000800000 R11: 0000000000000217 R12: 0000000000401950 [ 40.283027] R13: 00000000004019e0 R14: 0000000000000000 R15: 0000000000000000 [ 40.290275] [ 40.291875] Uninit was stored to memory at: [ 40.296185] kmsan_internal_chain_origin+0x12b/0x210 [ 40.301266] __msan_chain_origin+0x69/0xc0 [ 40.305486] __save_stack_trace+0x829/0xb00 [ 40.309793] save_stack_trace_tsk+0x258/0x2f0 [ 40.314265] proc_pid_stack+0x26a/0x470 [ 40.318216] proc_single_show+0x1af/0x300 [ 40.322337] seq_read+0xc7d/0x2260 [ 40.325856] do_iter_read+0x880/0xd70 [ 40.329633] vfs_readv+0x1ec/0x260 [ 40.333148] default_file_splice_read+0xa9a/0x1120 [ 40.338052] splice_direct_to_actor+0x4c6/0x1040 [ 40.342784] do_splice_direct+0x335/0x540 [ 40.346908] do_sendfile+0x1067/0x1e40 [ 40.350773] SYSC_sendfile64+0x1b3/0x300 [ 40.354812] SyS_sendfile64+0x64/0x90 [ 40.358588] do_syscall_64+0x309/0x430 [ 40.362451] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.367612] Uninit was stored to memory at: [ 40.371907] kmsan_internal_chain_origin+0x12b/0x210 [ 40.376984] __msan_chain_origin+0x69/0xc0 [ 40.381199] update_stack_state+0x959/0xa40 [ 40.385506] unwind_next_frame+0x618/0xe50 [ 40.389717] __save_stack_trace+0x734/0xb00 [ 40.394014] save_stack_trace_tsk+0x258/0x2f0 [ 40.398485] proc_pid_stack+0x26a/0x470 [ 40.402439] proc_single_show+0x1af/0x300 [ 40.406562] seq_read+0xc7d/0x2260 [ 40.410076] do_iter_read+0x880/0xd70 [ 40.413854] vfs_readv+0x1ec/0x260 [ 40.417374] default_file_splice_read+0xa9a/0x1120 [ 40.422278] splice_direct_to_actor+0x4c6/0x1040 [ 40.427018] do_splice_direct+0x335/0x540 [ 40.431142] do_sendfile+0x1067/0x1e40 [ 40.435003] SYSC_sendfile64+0x1b3/0x300 [ 40.439037] SyS_sendfile64+0x64/0x90 [ 40.442815] do_syscall_64+0x309/0x430 [ 40.446679] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.451849] Local variable description: ----wait.i@try_charge [ 40.457712] Variable was created at: [ 40.461404] try_charge+0x105/0x2fd0 [ 40.465100] mem_cgroup_try_charge+0xa80/0xf00 [ 40.469663] ================================================================== [ 40.476995] Disabling lock debugging due to kernel taint [ 40.482423] Kernel panic - not syncing: panic_on_warn set ... [ 40.482423] [ 40.490198] CPU: 0 PID: 4502 Comm: syz-executor707 Tainted: G B 4.16.0+ #87 [ 40.498490] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.507820] Call Trace: [ 40.510391] dump_stack+0x185/0x1d0 [ 40.514000] panic+0x39d/0x940 [ 40.517181] ? pointer+0x11e5/0x1410 [ 40.520871] kmsan_report+0x238/0x240 [ 40.524648] __msan_warning_32+0x6c/0xb0 [ 40.528687] ? proc_pid_stack+0x251/0x470 [ 40.532813] pointer+0x11e5/0x1410 [ 40.536333] ? proc_pid_stack+0x26a/0x470 [ 40.540460] vsnprintf+0xa2d/0x33c0 [ 40.544072] seq_printf+0x29f/0x420 [ 40.547689] ? save_stack_trace_tsk+0x26a/0x2f0 [ 40.552334] ? proc_pid_stack+0x26a/0x470 [ 40.556460] ? proc_pid_stack+0x26a/0x470 [ 40.560591] ? proc_pid_stack+0x26a/0x470 [ 40.564717] proc_pid_stack+0x326/0x470 [ 40.568672] proc_single_show+0x1af/0x300 [ 40.572799] ? proc_pid_wchan+0x250/0x250 [ 40.576924] ? proc_single_open+0x90/0x90 [ 40.581055] seq_read+0xc7d/0x2260 [ 40.584592] do_iter_read+0x880/0xd70 [ 40.588376] ? seq_open+0x360/0x360 [ 40.591982] vfs_readv+0x1ec/0x260 [ 40.595506] default_file_splice_read+0xa9a/0x1120 [ 40.600421] ? SYSC_tee+0x13d0/0x13d0 [ 40.604198] splice_direct_to_actor+0x4c6/0x1040 [ 40.608930] ? do_splice_direct+0x540/0x540 [ 40.613231] ? security_file_permission+0x28f/0x4b0 [ 40.618228] ? rw_verify_area+0x35e/0x580 [ 40.622353] do_splice_direct+0x335/0x540 [ 40.626482] do_sendfile+0x1067/0x1e40 [ 40.630352] SYSC_sendfile64+0x1b3/0x300 [ 40.634393] SyS_sendfile64+0x64/0x90 [ 40.638173] do_syscall_64+0x309/0x430 [ 40.642037] ? SYSC_sendfile+0x320/0x320 [ 40.646078] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.651242] RIP: 0033:0x4400c9 [ 40.654415] RSP: 002b:00007ffd5ba265b8 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 40.662097] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400c9 [ 40.669348] RDX: 0000000020014000 RSI: 0000000000000003 RDI: 0000000000000004 [ 40.676593] RBP: 00000000006ca018 R08: 65732f636f72702f R09: 65732f636f72702f [ 40.683846] R10: 0000004000800000 R11: 0000000000000217 R12: 0000000000401950 [ 40.691091] R13: 00000000004019e0 R14: 0000000000000000 R15: 0000000000000000 [ 40.698781] Dumping ftrace buffer: [ 40.702299] (ftrace buffer empty) [ 40.705986] Kernel Offset: disabled [ 40.709588] Rebooting in 86400 seconds..