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filesystem: keep unmapped guest paths out of the host namespace

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This commit is contained in:
nmzik
2026-09-28 18:39:03 +04:00
parent 05f92b6422
commit a107d1e333
4 changed files with 56 additions and 6 deletions
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src/kernel/fileSystem.cpp
+10 -2
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@@ -358,7 +358,8 @@ std::filesystem::path MountPoints::ResolvePath(const std::string& mounted_name)
#endif
}
return mounted_name;
// Unmounted guest paths must not fall through to the host filesystem.
return {};
}
void Initialize() {
@@ -461,6 +462,10 @@ int KYTY_SYSV_ABI KernelOpen(const char* path, int flags, uint16_t mode) {
}
file->real_name = g_mount_points->ResolvePath(file->name);
if (file->real_name.empty()) {
g_files->DeleteDescriptor(descriptor);
return KERNEL_ERROR_ENOENT;
}
if (trunc && rw_mode == Common::File::Mode::Read) {
g_files->DeleteDescriptor(descriptor);
@@ -1255,7 +1260,7 @@ int KYTY_SYSV_ABI KernelRename(const char* from, const char* to) {
auto real_from = g_mount_points->ResolvePath(from_path);
auto real_to = g_mount_points->ResolvePath(to_path);
if (!Common::File::IsFileExisting(real_from)) {
if (real_to.empty() || !Common::File::IsFileExisting(real_from)) {
return KERNEL_ERROR_ENOENT;
}
@@ -1335,6 +1340,9 @@ int KYTY_SYSV_ABI KernelMkdir(const char* path, uint16_t mode) {
path, mode);
auto real_name = g_mount_points->ResolvePath(std::string(path));
if (real_name.empty()) {
return KERNEL_ERROR_ENOENT;
}
if (Common::File::IsDirectoryExisting(real_name)) {
return KERNEL_ERROR_EEXIST;