EFAULT - Bad address | LinuxFix.dev

root@linuxfix:~/efault$

EFAULT

Bad address

Solutions

Prerequisites: Start by updating your system to resolve common issues and ensure the solutions provided below are compatible with your current environment.

check_latest_version && sudo apt update && sudo apt upgrade -y

Debug with core dumps

Enable and analyze core dumps:

ulimit -c unlimited

gdb program core

bt

Use debugging tools

Debug memory issues:

valgrind --tool=memcheck program

gdb --args program arguments

strace -e trace=memory program

Check system logs

Look for segmentation fault messages:

dmesg | grep segfault

journalctl | grep "segmentation fault"

What is EFAULT?

EFAULT occurs when a program tries to access an invalid memory address, often indicating a programming error.

Common scenarios: Segmentation faults, null pointer dereferences, buffer overflows, or corrupted memory.

Common Causes

Invalid memory address access
Null pointer dereference
Buffer overflow or underflow
Use after free errors
Stack corruption

Debugging Tips

cat /proc/sys/kernel/core_pattern

ldd program

file core

addr2line -e program address

Prevention

Use memory-safe programming practices
Validate pointers before use
Use static analysis tools
Enable compiler warnings

Additional Resources

GDB Debugging Guide

Debugging with GNU Debugger

errno memory segfault debugging