[PATCH 35/37] modpost: strip .o from modname before calling new_module()

Masahiro Yamada
2020-06-01T05:58:21Z

new_module() conditionally strips the .o because the modname has .o
suffix when it is called from read_symbols(), but no .o when it is
called from read_dump().

It is clearer to strip .o in read_symbols().

I also used flexible-array for mod->name.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

scripts/mod/modpost.c | 20 +++++++++++---------
scripts/mod/modpost.h | 2 +-
2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index b317328ae21b..ebfa9b76ba92 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -175,18 +175,12 @@ static struct module *find_module(const char *modname)
static struct module *new_module(const char *modname)
{
struct module *mod;
- char *p;

- mod = NOFAIL(malloc(sizeof(*mod)));
+ mod = NOFAIL(malloc(sizeof(*mod) + strlen(modname) + 1));
memset(mod, 0, sizeof(*mod));
- p = NOFAIL(strdup(modname));
-
- /* strip trailing .o */
- if (strends(p, ".o"))
- p[strlen(p) - 2] = '\0';

/* add to list */
- mod->name = p;
+ strcpy(mod->name, modname);
mod->is_vmlinux = is_vmlinux(modname);
mod->gpl_compatible = -1;
mod->next = modules;
@@ -2013,7 +2007,15 @@ static void read_symbols(const char *modname)
if (!parse_elf(&info, modname))
return;

- mod = new_module(modname);
+ {
+ char *tmp;
+
+ /* strip trailing .o */
+ tmp = NOFAIL(strdup(modname));
+ tmp[strlen(tmp) - 2] = '\0';
+ mod = new_module(tmp);
+ free(tmp);
+ }

if (!mod->is_vmlinux) {
license = get_modinfo(&info, "license");
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 264c0c51defa..1df87d204c9a 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -116,7 +116,6 @@ struct namespace_list {

struct module {
struct module *next;
- const char *name;
int gpl_compatible;
struct symbol *unres;
int from_dump; /* 1 if module was loaded from *.symver */
@@ -130,6 +129,7 @@ struct module {
struct namespace_list *missing_namespaces;
// Actual imported namespaces
struct namespace_list *imported_namespaces;
+ char name[];
};

struct elf_info {
--
2.25.1