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 '10.128.10.46' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.308649] ================================================================== [ 59.316054] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 59.321933] CPU: 0 PID: 4497 Comm: syz-executor539 Not tainted 4.16.0+ #87 [ 59.328930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.338272] Call Trace: [ 59.340861] dump_stack+0x185/0x1d0 [ 59.344486] ? pointer+0x11e5/0x1410 [ 59.348196] kmsan_report+0x142/0x240 [ 59.351984] __msan_warning_32+0x6c/0xb0 [ 59.356032] ? proc_single_show+0x191/0x300 [ 59.360337] pointer+0x11e5/0x1410 [ 59.363876] ? proc_single_show+0x1af/0x300 [ 59.368193] vsnprintf+0xa2d/0x33c0 [ 59.371927] seq_printf+0x29f/0x420 [ 59.375581] ? save_stack_trace_tsk+0x26a/0x2f0 [ 59.380251] ? proc_single_show+0x1af/0x300 [ 59.384596] ? proc_single_show+0x1af/0x300 [ 59.388899] ? proc_single_show+0x1af/0x300 [ 59.393201] proc_pid_stack+0x326/0x470 [ 59.397157] proc_single_show+0x1af/0x300 [ 59.401284] ? proc_pid_wchan+0x250/0x250 [ 59.405410] ? proc_single_open+0x90/0x90 [ 59.409531] seq_read+0xc7d/0x2260 [ 59.413055] ? __vfs_read+0xc9/0x9b0 [ 59.416744] ? seq_open+0x360/0x360 [ 59.420348] __vfs_read+0x1a5/0x9b0 [ 59.423957] vfs_read+0x36c/0x6c0 [ 59.427394] SYSC_pread64+0x275/0x310 [ 59.431173] SyS_pread64+0x65/0x90 [ 59.434689] do_syscall_64+0x309/0x430 [ 59.438558] ? SYSC_write+0x360/0x360 [ 59.442339] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.447507] RIP: 0033:0x440089 [ 59.450671] RSP: 002b:00007ffdc3e066b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 59.458355] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 59.465601] RDX: 000000000000003b RSI: 0000000020000000 RDI: 0000000000000003 [ 59.472849] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 59.480110] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 59.487358] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 59.494779] [ 59.496383] Uninit was stored to memory at: [ 59.501032] kmsan_internal_chain_origin+0x12b/0x210 [ 59.506231] __msan_chain_origin+0x69/0xc0 [ 59.510453] __save_stack_trace+0x829/0xb00 [ 59.514751] save_stack_trace_tsk+0x258/0x2f0 [ 59.519223] proc_pid_stack+0x26a/0x470 [ 59.523183] proc_single_show+0x1af/0x300 [ 59.527309] seq_read+0xc7d/0x2260 [ 59.530837] __vfs_read+0x1a5/0x9b0 [ 59.534441] vfs_read+0x36c/0x6c0 [ 59.538393] SYSC_pread64+0x275/0x310 [ 59.542169] SyS_pread64+0x65/0x90 [ 59.545696] do_syscall_64+0x309/0x430 [ 59.549573] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.555263] Uninit was stored to memory at: [ 59.559562] kmsan_internal_chain_origin+0x12b/0x210 [ 59.564640] __msan_chain_origin+0x69/0xc0 [ 59.568850] update_stack_state+0x959/0xa40 [ 59.573146] unwind_next_frame+0x618/0xe50 [ 59.577360] __save_stack_trace+0x734/0xb00 [ 59.581658] save_stack_trace_tsk+0x258/0x2f0 [ 59.586129] proc_pid_stack+0x26a/0x470 [ 59.590081] proc_single_show+0x1af/0x300 [ 59.594305] seq_read+0xc7d/0x2260 [ 59.597833] __vfs_read+0x1a5/0x9b0 [ 59.601442] vfs_read+0x36c/0x6c0 [ 59.604874] SYSC_pread64+0x275/0x310 [ 59.608650] SyS_pread64+0x65/0x90 [ 59.612166] do_syscall_64+0x309/0x430 [ 59.616040] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.621201] Local variable description: ----fl.i@locks_remove_file [ 59.627582] Variable was created at: [ 59.631274] locks_remove_file+0x65/0x1d70 [ 59.635499] __fput+0x3c4/0xa10 [ 59.638764] ================================================================== [ 59.646099] Disabling lock debugging due to kernel taint [ 59.651540] Kernel panic - not syncing: panic_on_warn set ... [ 59.651540] [ 59.658887] CPU: 0 PID: 4497 Comm: syz-executor539 Tainted: G B 4.16.0+ #87 [ 59.667174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.676503] Call Trace: [ 59.679083] dump_stack+0x185/0x1d0 [ 59.682690] panic+0x39d/0x940 [ 59.685868] ? pointer+0x11e5/0x1410 [ 59.689568] kmsan_report+0x238/0x240 [ 59.693354] __msan_warning_32+0x6c/0xb0 [ 59.697404] ? proc_single_show+0x191/0x300 [ 59.701699] pointer+0x11e5/0x1410 [ 59.705216] ? proc_single_show+0x1af/0x300 [ 59.714539] vsnprintf+0xa2d/0x33c0 [ 59.718149] seq_printf+0x29f/0x420 [ 59.721767] ? save_stack_trace_tsk+0x26a/0x2f0 [ 59.726415] ? proc_single_show+0x1af/0x300 [ 59.730712] ? proc_single_show+0x1af/0x300 [ 59.735009] ? proc_single_show+0x1af/0x300 [ 59.739333] proc_pid_stack+0x326/0x470 [ 59.743287] proc_single_show+0x1af/0x300 [ 59.747418] ? proc_pid_wchan+0x250/0x250 [ 59.751552] ? proc_single_open+0x90/0x90 [ 59.755678] seq_read+0xc7d/0x2260 [ 59.759350] ? __vfs_read+0xc9/0x9b0 [ 59.763067] ? seq_open+0x360/0x360 [ 59.767195] __vfs_read+0x1a5/0x9b0 [ 59.770908] vfs_read+0x36c/0x6c0 [ 59.774344] SYSC_pread64+0x275/0x310 [ 59.778123] SyS_pread64+0x65/0x90 [ 59.781652] do_syscall_64+0x309/0x430 [ 59.785524] ? SYSC_write+0x360/0x360 [ 59.789308] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.794735] RIP: 0033:0x440089 [ 59.797902] RSP: 002b:00007ffdc3e066b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 59.805672] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 59.812917] RDX: 000000000000003b RSI: 0000000020000000 RDI: 0000000000000003 [ 59.820164] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 59.827416] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 59.834750] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 59.842625] Dumping ftrace buffer: [ 59.846162] (ftrace buffer empty) [ 59.849849] Kernel Offset: disabled [ 59.853455] Rebooting in 86400 seconds..