Segmentation fault - Program crashed with segmentation fault

root@linuxfix:~/segmentation_fault$

Segmentation fault

Program crashed with segmentation fault

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

Enable core dumps

Generate crash dumps:

ulimit -c unlimited

echo "core.%e.%p" | sudo tee /proc/sys/kernel/core_pattern

Debug with GDB

Analyze the crash:

gdb program core

bt

info registers

Use Valgrind

Find memory errors:

valgrind --tool=memcheck program

valgrind --leak-check=full program

What is Segmentation fault?

A segmentation fault occurs when a program tries to access memory it is not allowed to access.

Common scenarios: Buffer overflows, null pointer dereferences, stack corruption, or memory access violations.

Common Causes

Invalid memory access
Buffer overflow
Null pointer dereference
Stack corruption
Use after free

Debugging Tips

dmesg | grep segfault

coredumpctl list

addr2line -e program address

Prevention

Use memory-safe languages
Enable compiler warnings
Static analysis tools

Additional Resources

GDB Tutorial

Debugging with GDB

crash memory debugging segfault