linux-ext4 - [PATCH] ext4: fix __ext4_xattr_set

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, 28 Jun 2017 14:47:50 -0700
From:   Tahsin Erdogan <tahsin@...gle.com>
To:     Andreas Dilger <adilger@...ger.ca>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        Jan Kara <jack@...e.cz>, Theodore Ts'o <tytso@....edu>,
        linux-ext4@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Tahsin Erdogan <tahsin@...gle.com>
Subject: [PATCH] ext4: fix __ext4_xattr_set_credits()

__ext4_xattr_set_credits() calculates journal credits needed for a
set xattr operation. Currently, credits needed for quota updates are
added only if ea_inode feature is enabled which is wrong. Fix this by
moving quota related additions to above ea_inode feature check.

Fixes: 74c5bfa651af ("ext4: xattr inode deduplication")

Signed-off-by: Tahsin Erdogan <tahsin@...gle.com>
---
 fs/ext4/xattr.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index ce12c3fb7e59..062756b4e6d8 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -845,6 +845,9 @@ static int __ext4_xattr_set_credits(struct super_block *sb,
 	 */
 	credits = 5;
 
+	/* Quota updates. */
+	credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(sb);
+
 	/* We are done if ea_inode feature is not enabled. */
 	if (!ext4_has_feature_ea_inode(sb))
 		return credits;
@@ -878,9 +881,6 @@ static int __ext4_xattr_set_credits(struct super_block *sb,
 	/* Block bitmap and group descriptor updates for each block. */
 	credits += blocks * 2;
 
-	/* Quota updates. */
-	credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(sb);
-
 	/* We may need to clone the existing xattr block in which case we need
 	 * to increment ref counts for existing ea_inodes referenced by it.
 	 */
-- 
2.13.2.725.g09c95d1e9-goog