linux-ext4 - [PATCH] libext2fs: ext2fs_open2() should not set ret

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,  8 Jan 2013 21:01:15 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	Theodore Ts'o <tytso@....edu>
Subject: [PATCH] libext2fs: ext2fs_open2() should not set ret_fs after a MMP failure

The addition of MMP code was added in the wrong place, so ret_fs could
get set (and EXT2_FLAG_NOFREE_ON_ERROR was cleared as well, which
could confuse e2fsck which depends on this flag being cleared if
ext2fs_open2() succeeded.)

Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
 lib/ext2fs/openfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index d483bd9..113b80e 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -391,9 +391,6 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
 			ext2fs_mark_super_dirty(fs);
 	}
 
-	fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
-	*ret_fs = fs;
-
 	if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
 	    !(flags & EXT2_FLAG_SKIP_MMP) &&
 	    (flags & (EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE))) {
@@ -405,6 +402,9 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
 		}
 	}
 
+	fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
+	*ret_fs = fs;
+
 	return 0;
 cleanup:
 	if (flags & EXT2_FLAG_NOFREE_ON_ERROR)
-- 
1.7.12.rc0.22.gcdd159b

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html