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authorZheng Liu <wenqing.lz@taobao.com>2013-04-03 20:27:18 +0400
committerTheodore Ts'o <tytso@mit.edu>2013-04-03 20:37:17 +0400
commit8cde7ad17e4f4ff8d12ff60dd09c0a291cb0b61c (patch)
treefa381ca0422657142d69a8a8528cefe1e57de973 /fs/ext4/indirect.c
parent07961ac7c0ee8b546658717034fe692fd12eefa9 (diff)
downloadlinux-8cde7ad17e4f4ff8d12ff60dd09c0a291cb0b61c.tar.xz
ext4: fix big-endian bugs which could cause fs corruptions
When an extent was zeroed out, we forgot to do convert from cpu to le16. It could make us hit a BUG_ON when we try to write dirty pages out. So fix it. [ Also fix a bug found by Dmitry Monakhov where we were missing le32_to_cpu() calls in the new indirect punch hole code. There are a number of other big endian warnings found by static code analyzers, but we'll wait for the next merge window to fix them all up. These fixes are designed to be Obviously Correct by code inspection, and easy to demonstrate that it won't make any difference (and hence, won't introduce any bugs) on little endian architectures such as x86. --tytso ] Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reported-by: CAI Qian <caiqian@redhat.com> Reported-by: Christian Kujau <lists@nerdbynature.de> Cc: Dmitry Monakhov <dmonakhov@openvz.org>
Diffstat (limited to 'fs/ext4/indirect.c')
-rw-r--r--fs/ext4/indirect.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index b505a145a593..a04183127ef0 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1539,9 +1539,9 @@ static int free_hole_blocks(handle_t *handle, struct inode *inode,
blk = *i_data;
if (level > 0) {
ext4_lblk_t first2;
- bh = sb_bread(inode->i_sb, blk);
+ bh = sb_bread(inode->i_sb, le32_to_cpu(blk));
if (!bh) {
- EXT4_ERROR_INODE_BLOCK(inode, blk,
+ EXT4_ERROR_INODE_BLOCK(inode, le32_to_cpu(blk),
"Read failure");
return -EIO;
}