linux-ext4 - [PATCH 8/8] e2fsck/jfs_user.h: Fix b_data alignment in struct buffer

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:	Fri, 14 Dec 2012 00:04:34 +0200
From:	Sami Liedes <sami.liedes@....fi>
To:	linux-ext4@...r.kernel.org
Subject: [PATCH 8/8] e2fsck/jfs_user.h: Fix b_data alignment in struct
 buffer_head

buffer_head.b_data needs to be 8-byte aligned to prevent an unaligned
access via a 64-bit pointer in e.g. scan_revoke_records().

Caught using clang -fsanitize=undefined.

Signed-off-by: Sami Liedes <sami.liedes@....fi>
---
 e2fsck/jfs_user.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/e2fsck/jfs_user.h b/e2fsck/jfs_user.h
index 3cccd3f..fdaf1b2 100644
--- a/e2fsck/jfs_user.h
+++ b/e2fsck/jfs_user.h
@@ -22,7 +22,7 @@ struct buffer_head {
 	int	 	b_dirty;
 	int	 	b_uptodate;
 	int	 	b_err;
-	char		b_data[1024];
+	char		b_data[1024]  __attribute__ ((aligned (8)));
 };
 
 struct inode {
-- 
1.7.10.4
--
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