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ext4fs: le32_to_cpu() used on a 16-bit field

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Fix reading ext4_extent_header struture on BE machines.  Some 16 bit
fields where converted to 32 bit fields, due to the byte swap on BE
machines the containing value was corrupted. Therefore reading ext4
filesystems on BE machines where broken before.

Signed-off-by: Rommel Custodio <sessyargc+uboot@gmail.com>
[sent via git-send-email; rework commit message]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
This commit is contained in:
Rommel Custodio 2013-07-21 10:53:25 +02:00 • committed by Tom Rini
parent b899fa3901
commit 8b415f703f
1 changed files with 6 additions and 6 deletions
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12
fs/ext4/ext4_common.c
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@ -1432,7 +1432,7 @@ static struct ext4_extent_header *ext4fs_get_extent_block
while (1) {
index = (struct ext4_extent_idx *)(ext_block + 1);
if (le32_to_cpu(ext_block->eh_magic) != EXT4_EXT_MAGIC)
if (le16_to_cpu(ext_block->eh_magic) != EXT4_EXT_MAGIC)
return 0;
if (ext_block->eh_depth == 0)
@ -1440,14 +1440,14 @@ static struct ext4_extent_header *ext4fs_get_extent_block
i = -1;
do {
i++;
if (i >= le32_to_cpu(ext_block->eh_entries))
if (i >= le16_to_cpu(ext_block->eh_entries))
break;
} while (fileblock > le32_to_cpu(index[i].ei_block));
if (--i < 0)
return 0;
block = le32_to_cpu(index[i].ei_leaf_hi);
block = le16_to_cpu(index[i].ei_leaf_hi);
block = (block << 32) + le32_to_cpu(index[i].ei_leaf_lo);
if (ext4fs_devread((lbaint_t)block << log2_blksz, 0, fs->blksz,
@ -1548,17 +1548,17 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
do {
i++;
if (i >= le32_to_cpu(ext_block->eh_entries))
if (i >= le16_to_cpu(ext_block->eh_entries))
break;
} while (fileblock >= le32_to_cpu(extent[i].ee_block));
if (--i >= 0) {
fileblock -= le32_to_cpu(extent[i].ee_block);
if (fileblock >= le32_to_cpu(extent[i].ee_len)) {
if (fileblock >= le16_to_cpu(extent[i].ee_len)) {
free(buf);
return 0;
}
start = le32_to_cpu(extent[i].ee_start_hi);
start = le16_to_cpu(extent[i].ee_start_hi);
start = (start << 32) +
le32_to_cpu(extent[i].ee_start_lo);
free(buf);