From a64512c3fe2d5a6bded602666829b98dd80ad7e1 Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Wed, 27 Mar 2013 10:25:52 +1100 Subject: [PATCH] KEYS: split call to call_usermodehelper_fns() Use call_usermodehelper_setup() + call_usermodehelper_exec() instead of calling call_usermodehelper_fns(). In case there's an OOM in this last function the cleanup function may not be called - in this case we would miss a call to key_put(). Signed-off-by: Lucas De Marchi Cc: Oleg Nesterov Acked-by: David Howells Acked-by: James Morris Cc: Al Viro Cc: Tejun Heo Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton --- security/keys/request_key.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/security/keys/request_key.c b/security/keys/request_key.c index 4bd6bdb74193..c411f9bb156b 100644 --- a/security/keys/request_key.c +++ b/security/keys/request_key.c @@ -93,9 +93,16 @@ static void umh_keys_cleanup(struct subprocess_info *info) static int call_usermodehelper_keys(char *path, char **argv, char **envp, struct key *session_keyring, int wait) { - return call_usermodehelper_fns(path, argv, envp, wait, - umh_keys_init, umh_keys_cleanup, - key_get(session_keyring)); + struct subprocess_info *info; + + info = call_usermodehelper_setup(path, argv, envp, GFP_KERNEL, + umh_keys_init, umh_keys_cleanup, + session_keyring); + if (!info) + return -ENOMEM; + + key_get(session_keyring); + return call_usermodehelper_exec(info, wait); } /* -- 2.39.5