[apparmor] [PATCH] apparmor: Return directly after a failed kzalloc() in two functions

[Markus Elfring]

Date: Wed, 29 Mar 2023 11:50:44 +0200

1. Return directly after a call of the function “kzalloc” failed
   at the beginning in these function implementations.

2. Omit extra initialisations (for a few local variables)
   which became unnecessary with this refactoring.


This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring at users.sourceforge.net>
---
 security/apparmor/crypto.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/security/apparmor/crypto.c b/security/apparmor/crypto.c
index b498ed302461..6724e2ff6da8 100644
--- a/security/apparmor/crypto.c
+++ b/security/apparmor/crypto.c
@@ -28,15 +28,15 @@ unsigned int aa_hash_size(void)
 char *aa_calc_hash(void *data, size_t len)
 {
 	SHASH_DESC_ON_STACK(desc, apparmor_tfm);
-	char *hash = NULL;
-	int error = -ENOMEM;
+	char *hash;
+	int error;

 	if (!apparmor_tfm)
 		return NULL;

 	hash = kzalloc(apparmor_hash_size, GFP_KERNEL);
 	if (!hash)
-		goto fail;
+		return ERR_PTR(-ENOMEM);

 	desc->tfm = apparmor_tfm;

@@ -62,7 +62,7 @@ int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
 			 size_t len)
 {
 	SHASH_DESC_ON_STACK(desc, apparmor_tfm);
-	int error = -ENOMEM;
+	int error;
 	__le32 le32_version = cpu_to_le32(version);

 	if (!aa_g_hash_policy)
@@ -73,7 +73,7 @@ int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,

 	profile->hash = kzalloc(apparmor_hash_size, GFP_KERNEL);
 	if (!profile->hash)
-		goto fail;
+		return -ENOMEM;

 	desc->tfm = apparmor_tfm;

--
2.40.0