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Kernel: Refuse to mkdir any directory named . or ..

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This commit is contained in:
apio 2022-11-05 12:09:01 +01:00
parent b78f6f269d
commit b2fb740d99
1 changed files with 10 additions and 0 deletions
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10
kernel/src/fs/VFS.cpp
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@ -152,6 +152,11 @@ int VFS::mkdir(const char* path, const char* name)
kwarnln("Chosen node does not support finddir()"); kwarnln("Chosen node does not support finddir()");
return -ENOTSUP; return -ENOTSUP;
} }
if (!strncmp(name, ".", strlen(name)) || !strncmp(name, "..", strlen(name)))
{
kwarnln("Attempted to mkdir . or .., which already exist");
return -EEXIST;
}
if (node->find_func(node, name) != nullptr) if (node->find_func(node, name) != nullptr)
{ {
kwarnln("Already exists"); kwarnln("Already exists");
@ -183,6 +188,11 @@ int VFS::do_mkdir(const char* path, const char* name, int uid, int gid, mode_t m
kwarnln("Chosen node does not support finddir()"); kwarnln("Chosen node does not support finddir()");
return -ENOTSUP; return -ENOTSUP;
} }
if (!strncmp(name, ".", strlen(name)) || !strncmp(name, "..", strlen(name)))
{
kwarnln("Attempted to mkdir . or .., which already exist");
return -EEXIST;
}
if (node->find_func(node, name) != nullptr) if (node->find_func(node, name) != nullptr)
{ {
kwarnln("Already exists"); kwarnln("Already exists");