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authorLucas De Marchi <lucas.demarchi@profusion.mobi>2013-05-01 02:28:03 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 04:04:06 +0400
commitf634460c90751da21745eec7a220edf76c7d0c76 (patch)
tree1f6e389c735fa2fca650e5b15c1cc81c1125b34a /kernel/kmod.c
parent938e4b22e2a7d0f6f3962e601339347b2d8e09f5 (diff)
downloadlinux-f634460c90751da21745eec7a220edf76c7d0c76.tar.xz
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>
Diffstat (limited to 'kernel/kmod.c')
-rw-r--r--kernel/kmod.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/kmod.c b/kernel/kmod.c
index e11ea14ac011..9941a4f155d1 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -77,6 +77,7 @@ static void free_modprobe_argv(struct subprocess_info *info)
static int call_modprobe(char *module_name, int wait)
{
+ struct subprocess_info *info;
static char *envp[] = {
"HOME=/",
"TERM=linux",
@@ -98,8 +99,15 @@ static int call_modprobe(char *module_name, int wait)
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: