linux-kernel - [PATCH] ntfs: Delete unnecessary checks before brelse()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Tue, 3 Sep 2019 16:20:43 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     linux-ntfs-dev@...ts.sourceforge.net,
        Anton Altaparmakov <anton@...era.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] ntfs: Delete unnecessary checks before brelse()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 3 Sep 2019 16:18:07 +0200

The brelse() function tests whether its argument is NULL
and then returns immediately.
Thus the tests around the shown calls are not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 fs/ntfs/super.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 29621d40f448..f0ed1a3e5c7e 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -676,8 +676,7 @@ static struct buffer_head *read_ntfs_boot_sector(struct super_block *sb,
 	} else if (!silent)
 		ntfs_error(sb, read_err_str, "primary");
 	if (!(NTFS_SB(sb)->on_errors & ON_ERRORS_RECOVER)) {
-		if (bh_primary)
-			brelse(bh_primary);
+		brelse(bh_primary);
 		if (!silent)
 			ntfs_error(sb, "Mount option errors=recover not used. "
 					"Aborting without trying to recover.");
@@ -703,8 +702,7 @@ static struct buffer_head *read_ntfs_boot_sector(struct super_block *sb,
 	} else if (!silent)
 		ntfs_error(sb, read_err_str, "backup");
 	/* We failed. Cleanup and return. */
-	if (bh_primary)
-		brelse(bh_primary);
+	brelse(bh_primary);
 	return NULL;
 hotfix_primary_boot_sector:
 	if (bh_primary) {
--
2.23.0