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Kernel: Process::exec(): Check if path is a regular file

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https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html

  [EACCES] The new process image file is not a regular file and the
           implementation does not support execution of files of its
           type.

Let's check whether the passed `path` is indeed a regular file.
This commit is contained in:
Jelle Raaijmakers 2021-06-04 22:51:04 +02:00 committed by Andreas Kling
parent 9510425845
commit f6d372b2ab
Notes: sideshowbarker 2024-07-18 16:52:25 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/f6d372b2ab0
Pull-request: https://github.com/SerenityOS/serenity/pull/7793
1 changed files with 3 additions and 0 deletions
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3
Kernel/Syscalls/execve.cpp
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@ -827,6 +827,9 @@ KResult Process::exec(String path, Vector<String> arguments, Vector<String> envi
auto description = file_or_error.release_value();
auto metadata = description->metadata();
if (!metadata.is_regular_file())
return EACCES;
// Always gonna need at least 3 bytes. these are for #!X
if (metadata.size < 3)
return ENOEXEC;