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.demar...@profusion.mobi>
---
Changes from v2: simplify error handling as suggested by Oleg.
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 4bd6bdb..c411f9b 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);
}
/*
--
1.8.1.5
--
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