From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nadav Amit <namit@vmware.com>,
VMware PV-Drivers Reviewers <pv-drivers@vmware.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH] misc: vmw_balloon: fix memory leak with using debugfs_lookup()
Date: Thu, 2 Feb 2023 15:11:00 +0100 [thread overview]
Message-ID: <20230202141100.2291188-1-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.
Cc: Nadav Amit <namit@vmware.com>
Cc: VMware PV-Drivers Reviewers <pv-drivers@vmware.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/vmw_balloon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index 61a2be712bf7..9ce9b9e0e9b6 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -1709,7 +1709,7 @@ static void __init vmballoon_debugfs_init(struct vmballoon *b)
static void __exit vmballoon_debugfs_exit(struct vmballoon *b)
{
static_key_disable(&balloon_stat_enabled.key);
- debugfs_remove(debugfs_lookup("vmmemctl", NULL));
+ debugfs_lookup_and_remove("vmmemctl", NULL);
kfree(b->stats);
b->stats = NULL;
}
--
2.39.1
reply other threads:[~2023-02-02 14:11 UTC|newest]
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