kmod: split call to call_usermodehelper_fns()
Use call_usermodehelper_setup() + call_usermodehelper_exec() instead of
calling call_usermodehelper_fns(). In case the latter returns -ENOMEM the
cleanup function may had not been called - in this case we would not free
argv and module_name.
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/kmod.c b/kernel/kmod.c
index e11ea14..9941a4f 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -77,6 +77,7 @@
static int call_modprobe(char *module_name, int wait)
{
+ struct subprocess_info *info;
static char *envp[] = {
"HOME=/",
"TERM=linux",
@@ -98,8 +99,15 @@
argv[3] = module_name; /* check free_modprobe_argv() */
argv[4] = NULL;
- return call_usermodehelper_fns(modprobe_path, argv, envp,
- wait | UMH_KILLABLE, NULL, free_modprobe_argv, NULL);
+ info = call_usermodehelper_setup(modprobe_path, argv, envp, GFP_KERNEL,
+ NULL, free_modprobe_argv, NULL);
+ if (!info)
+ goto free_module_name;
+
+ return call_usermodehelper_exec(info, wait | UMH_KILLABLE);
+
+free_module_name:
+ kfree(module_name);
free_argv:
kfree(argv);
out: