modprobe: fix "modprobe devname:snd/timer" case (alias with a slash)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 9 insertions, 4 deletions

diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index d1adaf8e1..ce8b0b886 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -207,7 +207,7 @@ static struct module_entry *helper_get_module(const char *module, int create)
         unsigned i;
         unsigned hash;
 
-        filename2modname(bb_get_last_path_component_nostrip(module), modname);
+        filename2modname(module, modname);
 
         hash = 0;
         for (i = 0; modname[i]; i++)
@@ -232,9 +232,14 @@ static ALWAYS_INLINE struct module_entry *get_or_add_modentry(const char *module
 {
         return helper_get_module(module, 1);
 }
-static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
+/* So far this function always gets a module pathname, never an alias name.
+ * The crucial difference is that pathname needs dirname stripping,
+ * while alias name must NOT do it!
+ * Testcase where dirname stripping is likely to go wrong: "modprobe devname:snd/timer"
+ */
+static ALWAYS_INLINE struct module_entry *get_modentry(const char *pathname)
 {
-        return helper_get_module(module, 0);
+        return helper_get_module(bb_get_last_path_component_nostrip(pathname), 0);
 }
 
 static void add_probe(const char *name)
@@ -502,7 +507,7 @@ static void load_modules_dep(void)
                 colon = last_char_is(tokens[0], ':');
                 if (colon == NULL)
                         continue;
-                *colon = 0;
+                *colon = '\0';
 
                 m = get_modentry(tokens[0]);
                 if (m == NULL)