From: Christian Brauner <brauner@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Amir Goldstein <amir73il@gmail.com>,
Miklos Szeredi <miklos@szeredi.hu>,
Al Viro <viro@zeniv.linux.org.uk>, Jens Axboe <axboe@kernel.dk>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Christian Brauner <brauner@kernel.org>
Subject: [PATCH v2 17/29] open: avoid pointless cred reference count bump
Date: Mon, 25 Nov 2024 15:10:13 +0100 [thread overview]
Message-ID: <20241125-work-cred-v2-17-68b9d38bb5b2@kernel.org> (raw)
In-Reply-To: <20241125-work-cred-v2-0-68b9d38bb5b2@kernel.org>
The code already got rid of the extra reference count from the old
version of override_creds().
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
fs/open.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/fs/open.c b/fs/open.c
index 0a5cd8e74fb9bb4cc484d84096c6123b21acbf16..ffcfef67ac864c8ddaf9719cbc2762d5575597f3 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -402,7 +402,6 @@ static bool access_need_override_creds(int flags)
static const struct cred *access_override_creds(void)
{
- const struct cred *old_cred;
struct cred *override_cred;
override_cred = prepare_creds();
@@ -447,13 +446,7 @@ static const struct cred *access_override_creds(void)
* freeing.
*/
override_cred->non_rcu = 1;
-
- old_cred = override_creds(get_new_cred(override_cred));
-
- /* override_cred() gets its own ref */
- put_cred(override_cred);
-
- return old_cred;
+ return override_creds(override_cred);
}
static long do_faccessat(int dfd, const char __user *filename, int mode, int flags)
--
2.45.2
next prev parent reply other threads:[~2024-11-25 14:11 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-25 14:09 [PATCH v2 00/29] cred: rework {override,revert}_creds() Christian Brauner
2024-11-25 14:09 ` [PATCH v2 01/29] tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g Christian Brauner
2024-11-25 14:09 ` [PATCH v2 02/29] cred: return old creds from revert_creds_light() Christian Brauner
2024-11-25 14:09 ` [PATCH v2 03/29] tree-wide: s/revert_creds()/put_cred(revert_creds_light())/g Christian Brauner
2024-11-25 14:10 ` [PATCH v2 04/29] cred: remove old {override,revert}_creds() helpers Christian Brauner
2024-11-25 14:10 ` [PATCH v2 05/29] tree-wide: s/override_creds_light()/override_creds()/g Christian Brauner
2024-11-25 14:10 ` [PATCH v2 06/29] tree-wide: s/revert_creds_light()/revert_creds()/g Christian Brauner
2024-11-25 14:10 ` [PATCH v2 07/29] firmware: avoid pointless reference count bump Christian Brauner
2024-11-25 14:10 ` [PATCH v2 08/29] sev-dev: avoid pointless cred " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 09/29] target_core_configfs: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 10/29] aio: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 11/29] binfmt_misc: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 12/29] coredump: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 13/29] nfs/localio: avoid pointless cred reference count bumps Christian Brauner
2024-11-25 14:10 ` [PATCH v2 14/29] nfs/nfs4idmap: avoid pointless reference count bump Christian Brauner
2024-11-25 14:10 ` [PATCH v2 15/29] nfs/nfs4recover: avoid pointless cred " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 16/29] nfsfh: " Christian Brauner
2024-11-25 14:10 ` Christian Brauner [this message]
2024-11-25 14:10 ` [PATCH v2 18/29] ovl: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 19/29] cifs: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 20/29] " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 21/29] smb: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 22/29] io_uring: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 23/29] acct: avoid pointless " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 24/29] cgroup: avoid pointless cred " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 25/29] trace: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 26/29] dns_resolver: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 27/29] cachefiles: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 28/29] nfsd: " Christian Brauner
2024-11-25 14:10 ` [PATCH v2 29/29] cred: remove unused get_new_cred() Christian Brauner
2024-11-25 15:37 ` [PATCH v2 00/29] cred: rework {override,revert}_creds() Chuck Lever
2024-11-25 16:53 ` Linus Torvalds
2024-11-26 9:57 ` Christian Brauner
2024-11-27 2:03 ` Jens Axboe
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