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authorLucas De Marchi <lucas.demarchi@profusion.mobi>2013-04-30 15:28:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 17:04:06 -0700
commit93997f6ddb9d574cd58694f13c5b15212927bfa1 (patch)
tree730d902f168df136dad8b7a2b0b438a2929311f3
parentf634460c90751da21745eec7a220edf76c7d0c76 (diff)
downloadvexpress-lsk-93997f6ddb9d574cd58694f13c5b15212927bfa1.tar.gz
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 <lucas.demarchi@profusion.mobi> Cc: Oleg Nesterov <oleg@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Acked-by: 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>
-rw-r--r--security/keys/request_key.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 4bd6bdb7419..c411f9bb156 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);
}
/*