linux-kernel - [PATCH v2 27/29] cachefiles: avoid pointless cred reference count bump

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Message-Id: <20241125-work-cred-v2-27-68b9d38bb5b2@kernel.org>
Date: Mon, 25 Nov 2024 15:10:23 +0100
From: Christian Brauner <brauner@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Amir Goldstein <amir73il@...il.com>, Miklos Szeredi <miklos@...redi.hu>, 
 Al Viro <viro@...iv.linux.org.uk>, Jens Axboe <axboe@...nel.dk>, 
 linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH v2 27/29] cachefiles: avoid pointless cred reference count
 bump

The cache holds a long-term reference to the credentials that's taken
when the cache is created and put when the cache becomes unused.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 fs/cachefiles/internal.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index 1cfeb3b3831900b7c389c55c59fc7e3b84acfca6..7b99bd98de75b8d95e09da1ca7cd1bb3378fcc62 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -393,13 +393,13 @@ extern int cachefiles_determine_cache_security(struct cachefiles_cache *cache,
 static inline void cachefiles_begin_secure(struct cachefiles_cache *cache,
 					   const struct cred **_saved_cred)
 {
-	*_saved_cred = override_creds(get_new_cred(cache->cache_cred));
+	*_saved_cred = override_creds(cache->cache_cred);
 }
 
 static inline void cachefiles_end_secure(struct cachefiles_cache *cache,
 					 const struct cred *saved_cred)
 {
-	put_cred(revert_creds(saved_cred));
+	revert_creds(saved_cred);
 }
 
 /*

-- 
2.45.2