netdev - [PATCH 11/12] trace: use prepare credential guard

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Message-Id: <20251103-work-creds-guards-prepare_creds-v1-11-b447b82f2c9b@kernel.org>
Date: Mon, 03 Nov 2025 15:57:37 +0100
From: Christian Brauner <brauner@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-aio@...ck.org, linux-unionfs@...r.kernel.org, 
 linux-erofs@...ts.ozlabs.org, linux-nfs@...r.kernel.org, 
 linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org, 
 cgroups@...r.kernel.org, netdev@...r.kernel.org, 
 linux-crypto@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH 11/12] trace: use prepare credential guard

Use the prepare credential guard for allocating a new set of
credentials.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 kernel/trace/trace_events_user.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c
index c428dafe7496..3461b1d29276 100644
--- a/kernel/trace/trace_events_user.c
+++ b/kernel/trace/trace_events_user.c
@@ -1453,8 +1453,7 @@ static int user_event_set_call_visible(struct user_event *user, bool visible)
 	const struct cred *old_cred;
 	struct cred *cred;
 
-	cred = prepare_creds();
-
+	CLASS(prepare_creds, cred)();
 	if (!cred)
 		return -ENOMEM;
 
@@ -1477,7 +1476,6 @@ static int user_event_set_call_visible(struct user_event *user, bool visible)
 		ret = trace_remove_event_call(&user->call);
 
 	revert_creds(old_cred);
-	put_cred(cred);
 
 	return ret;
 }

-- 
2.47.3