What is SEGV_MAPERR?

by

There are two common kinds of SEGV, which is an error that results from an invalid memory access:

  1. A page was accessed which had the wrong permissions. E.g., it was read-only but your code tried to write to it. This will be reported as SEGV_ACCERR.
  2. A page was accessed that is not even mapped into the address space of the application at all. This will often result from dereferencing a null pointer or a pointer that was corrupted with a small integer value. This is reported as SEGV_MAPERR.

Documentation of a sort (indexed Linux source code) for SEGV_MAPERR is here: https://elixir.bootlin.com/linux/latest/A/ident/SEGV_MAPERR.

More Related Contents:

  1. What is the meaning of “POSIX”?
  2. How do I analyze a program’s core dump file with GDB when it has command-line parameters?
  3. How to generate a core dump in Linux on a segmentation fault?
  4. How to kill all processes with a given partial name? [closed]
  5. How does mmap improve file reading speed?
  6. Linux and I/O completion ports?
  7. How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
  8. Core dump file is not generated
  9. UDP-Broadcast on all interfaces
  10. Difference between Real User ID, Effective User ID and Saved User ID
  11. Is there really no asynchronous block I/O on Linux?
  12. What is the status of POSIX asynchronous I/O (AIO)?
  13. What is path //, how is it different from /
  14. Setting creation or change timestamps
  15. How to set the environmental variable LD_LIBRARY_PATH in linux
  16. How do I write standard error to a file while using “tee” with a pipe?
  17. Linking OpenSSL libraries to a program
  18. What is an uninterruptible process?
  19. how to create docker overlay network between multi hosts?
  20. BlueZ: How to set up a GATT server from the command line
  21. How do I set up cron to run a file just once at a specific time? [closed]
  22. How to find all files containing specific text (string) on Linux?
  23. Chmod 777 to a folder and all contents [duplicate]
  24. Multithreading in Bash [duplicate]
  25. Difference between shell and environment variables
  26. Why crontab uses OR when both day of month and day of week specified?
  27. Linux Mach-O Disassembler
  28. How clear and invalidate ARM v7 processor cache from User Mode on Linux 2.6.35
  29. Forking vs Threading
  30. How can I get position of cursor in terminal?

Leave a Comment