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Kernel: Make VirtualFileSystem functions take credentials as input

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Instead of getting credentials from Process::current(), we now require
that they be provided as input to the various VFS functions.

This ensures that an atomic set of credentials is used throughout an
entire VFS operation.
This commit is contained in:
Andreas Kling 2022-08-21 16:02:24 +02:00
parent 9744dedb50
commit c3351d4b9f
33 changed files with 159 additions and 165 deletions
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4
Kernel/Syscalls/chdir.cpp
View file

@ -19,7 +19,7 @@ ErrorOr<FlatPtr> Process::sys$chdir(Userspace<char const*> user_path, size_t pat
auto current_directory = m_current_directory.with([](auto& current_directory) -> NonnullRefPtr<Custody> {
return *current_directory;
});
RefPtr<Custody> new_directory = TRY(VirtualFileSystem::the().open_directory(path->view(), *current_directory));
RefPtr<Custody> new_directory = TRY(VirtualFileSystem::the().open_directory(credentials(), path->view(), *current_directory));
m_current_directory.with([&](auto& current_directory) {
// NOTE: We use swap() here to avoid manipulating the ref counts while holding the lock.
swap(current_directory, new_directory);
@ -34,7 +34,7 @@ ErrorOr<FlatPtr> Process::sys$fchdir(int fd)
auto description = TRY(open_file_description(fd));
if (!description->is_directory())
return ENOTDIR;
if (!description->metadata().may_execute(*this))
if (!description->metadata().may_execute(credentials()))
return EACCES;
m_current_directory.with([&](auto& current_directory) {
current_directory = description->custody();