From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 2 Feb 2023 14:10:09 +0000 (+0100)
Subject: scsi: snic: Fix memory leak with using debugfs_lookup()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5a46d8bdaf03e8a4bb83f0c363326d9aa66cc122;p=linux.git

scsi: snic: Fix memory leak with using debugfs_lookup()

[ Upstream commit ad0e4e2fab928477f74d742e6e77d79245d3d3e7 ]

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.

Link: https://lore.kernel.org/r/20230202141009.2290380-1-gregkh@linuxfoundation.org
Cc: Karan Tilak Kumar <kartilak@cisco.com>
Cc: Sesidhar Baddela <sebaddel@cisco.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/scsi/snic/snic_debugfs.c b/drivers/scsi/snic/snic_debugfs.c
index 5e0faeba516e5..76baa4f9a06e3 100644
--- a/drivers/scsi/snic/snic_debugfs.c
+++ b/drivers/scsi/snic/snic_debugfs.c
@@ -451,6 +451,6 @@ void snic_trc_debugfs_init(void)
 void
 snic_trc_debugfs_term(void)
 {
-	debugfs_remove(debugfs_lookup(TRC_FILE, snic_glob->trc_root));
-	debugfs_remove(debugfs_lookup(TRC_ENABLE_FILE, snic_glob->trc_root));
+	debugfs_lookup_and_remove(TRC_FILE, snic_glob->trc_root);
+	debugfs_lookup_and_remove(TRC_ENABLE_FILE, snic_glob->trc_root);
 }