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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH] kernel/time/test_udelay.c: fix memory leak with using debugfs_lookup()
Date: Thu,  2 Feb 2023 16:12:14 +0100	[thread overview]
Message-ID: <20230202151214.2306822-1-gregkh@linuxfoundation.org> (raw)

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 kernel/time/test_udelay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/test_udelay.c b/kernel/time/test_udelay.c
index 13b11eb62685..20d5df631570 100644
--- a/kernel/time/test_udelay.c
+++ b/kernel/time/test_udelay.c
@@ -149,7 +149,7 @@ module_init(udelay_test_init);
 static void __exit udelay_test_exit(void)
 {
 	mutex_lock(&udelay_test_lock);
-	debugfs_remove(debugfs_lookup(DEBUGFS_FILENAME, NULL));
+	debugfs_lookup_and_remove(DEBUGFS_FILENAME, NULL);
 	mutex_unlock(&udelay_test_lock);
 }
 
-- 
2.39.1


             reply	other threads:[~2023-02-02 15:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-02 15:12 Greg Kroah-Hartman [this message]
2023-02-09 19:16 ` [tip: timers/core] time/debug: Fix memory leak with using debugfs_lookup() tip-bot2 for Greg Kroah-Hartman

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