linux-ext4 - [PATCH 2/2] libext2fs: fix bad cast which causes problems for file systems

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

Date:	Tue,  4 Oct 2011 00:27:00 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	sandeen@...deen.net, Theodore Ts'o <tytso@....edu>
Subject: [PATCH 2/2] libext2fs: fix bad cast which causes problems for file systems > 512EB

If the number of block groups exceeds 2**32, a bad cast would lead to
a bogus "Not enough space to build proposed filesystem while setting
up superblock" failure.

Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
 lib/ext2fs/initialize.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/ext2fs/initialize.c b/lib/ext2fs/initialize.c
index 2875f97..b050a0a 100644
--- a/lib/ext2fs/initialize.c
+++ b/lib/ext2fs/initialize.c
@@ -248,7 +248,7 @@ errcode_t ext2fs_initialize(const char *name, int flags,
 	}
 
 retry:
-	fs->group_desc_count = (blk_t) ext2fs_div64_ceil(
+	fs->group_desc_count = (dgrp_t) ext2fs_div64_ceil(
 		ext2fs_blocks_count(super) - super->s_first_data_block,
 		EXT2_BLOCKS_PER_GROUP(super));
 	if (fs->group_desc_count == 0) {
-- 
1.7.4.1.22.gec8e1.dirty

--
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