linux-kernel - [PATCH] btrfs:free-space-cache: remove unneeded NULL check before kfree

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 for Android: free password hash cracker in your pocket

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

Message-ID: <1534140369-11578-1-git-send-email-zhongjiang@huawei.com>
Date:   Mon, 13 Aug 2018 14:06:08 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <clm@...com>, <jbacik@...com>, <dsterba@...e.com>
CC:     <linux-btrfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] btrfs:free-space-cache: remove unneeded NULL check before kfree

Kfree has taken the null pointer into account. So remove the check
before kfree.

The issue is detected with the help of Coccinelle.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 fs/btrfs/free-space-cache.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index c3888c1..69d639f 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2110,8 +2110,7 @@ static int insert_into_bitmap(struct btrfs_free_space_ctl *ctl,
 
 out:
 	if (info) {
-		if (info->bitmap)
-			kfree(info->bitmap);
+		kfree(info->bitmap);
 		kmem_cache_free(btrfs_free_space_cachep, info);
 	}
 
@@ -3605,8 +3604,7 @@ int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
 
 	if (info)
 		kmem_cache_free(btrfs_free_space_cachep, info);
-	if (map)
-		kfree(map);
+	kfree(map);
 	return 0;
 }
 
-- 
1.7.12.4