Issue : I wrote a proof of concept program which reads a file as string and prints it. but it causes multiple statx errors while testing it with valgrind memcheck.
Rustc version =>
rustc 1.57.0 (f1edd0429 2021-11-29)
binary: rustc
commit-hash: f1edd0429582dd29cccacaf50fd134b05593bd9c
commit-date: 2021-11-29
host: x86_64-unknown-linux-gnu
release: 1.57.0
LLVM version: 13.0.0
Here's the program I'm running and testing with valgrind =>
use std::fs;
fn main() {
let content = fs::read_to_string("/home/palash/fuu/a.txt").unwrap();
println!("{}" , content);
}
If I build the program with/without --release and try to test with valgrind memcheck, it shows multiple statx errors.
Valgrind Error
==35534== Memcheck, a memory error detector
==35534== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==35534== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info
==35534== Command: ./target/debug/fuu
==35534== Parent PID: 32919
==35534==
==35534== Syscall param statx(file_name) points to unaddressable byte(s)
==35534== at 0x4B179FE: statx (statx.c:29)
==35534== by 0x12B490: statx (weak.rs:136)
==35534== by 0x12B490: std::sys::unix::fs::try_statx (fs.rs:139)
==35534== by 0x122645: file_attr (fs.rs:776)
==35534== by 0x122645: metadata (fs.rs:493)
==35534== by 0x122645: buffer_capacity_required (fs.rs:609)
==35534== by 0x122645: <std::fs::File as std::io::Read>::read_to_string (fs.rs:645)
==35534== by 0x122586: std::fs::read_to_string::inner (fs.rs:271)
==35534== by 0x110AF5: std::fs::read_to_string (fs.rs:274)
==35534== by 0x11140C: fuu::main (main.rs:4)
==35534== by 0x11104A: core::ops::function::FnOnce::call_once (function.rs:227)
==35534== by 0x1115ED: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:123)
==35534== by 0x1118D0: std::rt::lang_start::{{closure}} (rt.rs:146)
==35534== by 0x126EEA: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:259)
==35534== by 0x126EEA: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:403)
==35534== by 0x126EEA: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:367)
==35534== by 0x126EEA: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:133)
==35534== by 0x126EEA: {closure#2} (rt.rs:128)
==35534== by 0x126EEA: do_call<std::rt::lang_start_internal::{closure#2}, isize> (panicking.rs:403)
==35534== by 0x126EEA: try<isize, std::rt::lang_start_internal::{closure#2}> (panicking.rs:367)
==35534== by 0x126EEA: catch_unwind<std::rt::lang_start_internal::{closure#2}, isize> (panic.rs:133)
==35534== by 0x126EEA: std::rt::lang_start_internal (rt.rs:128)
==35534== by 0x11189F: std::rt::lang_start (rt.rs:145)
==35534== by 0x11150B: main (in /home/palash/fuu/target/debug/fuu)
==35534== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==35534==
==35534== Syscall param statx(buf) points to unaddressable byte(s)
==35534== at 0x4B179FE: statx (statx.c:29)
==35534== by 0x12B490: statx (weak.rs:136)
==35534== by 0x12B490: std::sys::unix::fs::try_statx (fs.rs:139)
==35534== by 0x122645: file_attr (fs.rs:776)
==35534== by 0x122645: metadata (fs.rs:493)
==35534== by 0x122645: buffer_capacity_required (fs.rs:609)
==35534== by 0x122645: <std::fs::File as std::io::Read>::read_to_string (fs.rs:645)
==35534== by 0x122586: std::fs::read_to_string::inner (fs.rs:271)
==35534== by 0x110AF5: std::fs::read_to_string (fs.rs:274)
==35534== by 0x11140C: fuu::main (main.rs:4)
==35534== by 0x11104A: core::ops::function::FnOnce::call_once (function.rs:227)
==35534== by 0x1115ED: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:123)
==35534== by 0x1118D0: std::rt::lang_start::{{closure}} (rt.rs:146)
==35534== by 0x126EEA: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:259)
==35534== by 0x126EEA: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:403)
==35534== by 0x126EEA: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:367)
==35534== by 0x126EEA: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:133)
==35534== by 0x126EEA: {closure#2} (rt.rs:128)
==35534== by 0x126EEA: do_call<std::rt::lang_start_internal::{closure#2}, isize> (panicking.rs:403)
==35534== by 0x126EEA: try<isize, std::rt::lang_start_internal::{closure#2}> (panicking.rs:367)
==35534== by 0x126EEA: catch_unwind<std::rt::lang_start_internal::{closure#2}, isize> (panic.rs:133)
==35534== by 0x126EEA: std::rt::lang_start_internal (rt.rs:128)
==35534== by 0x11189F: std::rt::lang_start (rt.rs:145)
==35534== by 0x11150B: main (in /home/palash/fuu/target/debug/fuu)
==35534== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==35534==
==35534==
==35534== HEAP SUMMARY:
==35534== in use at exit: 0 bytes in 0 blocks
==35534== total heap usage: 12 allocs, 12 frees, 3,060 bytes allocated
==35534==
==35534== All heap blocks were freed -- no leaks are possible
==35534==
==35534== For lists of detected and suppressed errors, rerun with: -s
==35534== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
I looked up for similar issues on the official repo of rust and I found this issue #68979.
Is this a rust bug or am I doing something wrong?
FYI, I also tried compiling aforementioned program with rust nightly (rustc 1.59.0-nightly) but still same issue.
Any help will be appreciated.. Thank You
