RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 08:08:12 +00:00
Code Issues Activity Actions

Kernel: Clarify ambiguous {File,Description}::absolute_path

Browse source 
Found due to smelly code in InodeFile::absolute_path.

In particular, this replaces the following misleading methods:

File::absolute_path
This method *never* returns an actual path, and if called on an
InodeFile (which is impossible), it would VERIFY_NOT_REACHED().

OpenFileDescription::try_serialize_absolute_path
OpenFileDescription::absolute_path
These methods do not guarantee to return an actual path (just like the
other method), and just like Custody::absolute_path they do not
guarantee accuracy. In particular, just renaming the method made a
TOCTOU bug obvious.

The new method signatures use KResultOr, just like
try_serialize_absolute_path() already did.
This commit is contained in:
Ben Wiederhake 2021-10-30 00:45:23 +02:00 • committed by Andreas Kling
parent 88ca12f037
commit c05c5a7ff4
28 changed files with 83 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

18
Kernel/GlobalProcessExposed.cpp
View file

@ -365,15 +365,23 @@ private:
fs_object.add("readonly", fs.is_readonly());
fs_object.add("mount_flags", mount.flags());
if (fs.is_file_backed())
fs_object.add("source", static_cast<const FileBackedFileSystem&>(fs).file_description().absolute_path());
else
if (fs.is_file_backed()) {
auto pseudo_path_or_error = static_cast<const FileBackedFileSystem&>(fs).file_description().pseudo_path();
if (pseudo_path_or_error.is_error()) {
// We're probably out of memory and should not attempt to continue.
result = pseudo_path_or_error.error();
return IterationDecision::Break;
}
fs_object.add("source", pseudo_path_or_error.value()->characters());
} else {
fs_object.add("source", "none");
}
return IterationDecision::Continue;
});
array.finish();
return KSuccess;
if (result == KSuccess)
array.finish();
return result;
}
};