diff options
| author | Rommel Custodio <[email protected]> | 2013-07-21 10:53:25 +0200 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2013-07-22 10:09:30 -0400 |
| commit | 8b415f703f88d1d3b0466830047affbbf7f24913 (patch) | |
| tree | 091065fb1ea38405155a4ed0fffa53a2a82a031d | |
| parent | b899fa39019c8fecb508f747525dd8c22622e804 (diff) | |
ext4fs: le32_to_cpu() used on a 16-bit field
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 <[email protected]>
[sent via git-send-email; rework commit message]
Signed-off-by: Andreas Bießmann <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Tested-by: Simon Glass <[email protected]>
Tested-by: Lukasz Majewski <[email protected]>
| -rw-r--r-- | fs/ext4/ext4_common.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 277629380f3..ff9c4ecd935 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -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); |