libelf_uninit() only called libelf_freesymtab() when the module had an
uninitializer. But the exported symbol table is built by
libelf_insertsymtab() for every loaded module, and nothing in the tree
sets modinfo.uninitializer anymore: modules have registered their
teardown through .fini_array since a9cb28cd23. The condition is
therefore always false and every rmmod()/dlclose() leaks the exports
array together with the strdup-ed symbol names.
Call libelf_freesymtab() unconditionally, and clear the exports
pointers next to it instead of under a vestigial procfs guard that
dates back to the removed module initializer field.
Assisted-by: OpenAI Codex
Signed-off-by: yushuailong <yyyusl@qq.com>
166f17746c