linux-ext4 - [PATCH] ext4: remove redundant condition check

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>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 14 Nov 2018 07:24:48 +0800
From:   Chengguang Xu <cgxu519@....com>
To:     tytso@....edu, adilger.kernel@...ger.ca
Cc:     linux-ext4@...r.kernel.org, Chengguang Xu <cgxu519@....com>
Subject: [PATCH] ext4: remove redundant condition check

ext4_xattr_destroy_cache() can handle NULL pointer correctly,
so there is no need to check NULL pointer before calling
ext4_xattr_destroy_cache().

Signed-off-by: Chengguang Xu <cgxu519@....com>
---
 fs/ext4/super.c | 29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 53ff6c2a26ed..30d4a4e69de8 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1000,14 +1000,13 @@ static void ext4_put_super(struct super_block *sb)
 		invalidate_bdev(sbi->journal_bdev);
 		ext4_blkdev_remove(sbi);
 	}
-	if (sbi->s_ea_inode_cache) {
-		ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
-		sbi->s_ea_inode_cache = NULL;
-	}
-	if (sbi->s_ea_block_cache) {
-		ext4_xattr_destroy_cache(sbi->s_ea_block_cache);
-		sbi->s_ea_block_cache = NULL;
-	}
+
+	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
+	sbi->s_ea_inode_cache = NULL;
+
+	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);
+	sbi->s_ea_block_cache = NULL;
+
 	if (sbi->s_mmp_tsk)
 		kthread_stop(sbi->s_mmp_tsk);
 	brelse(sbi->s_sbh);
@@ -4522,14 +4521,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	if (EXT4_SB(sb)->rsv_conversion_wq)
 		destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
 failed_mount_wq:
-	if (sbi->s_ea_inode_cache) {
-		ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
-		sbi->s_ea_inode_cache = NULL;
-	}
-	if (sbi->s_ea_block_cache) {
-		ext4_xattr_destroy_cache(sbi->s_ea_block_cache);
-		sbi->s_ea_block_cache = NULL;
-	}
+	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
+	sbi->s_ea_inode_cache = NULL;
+
+	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);
+	sbi->s_ea_block_cache = NULL;
+
 	if (sbi->s_journal) {
 		jbd2_journal_destroy(sbi->s_journal);
 		sbi->s_journal = NULL;
-- 
2.17.2