The ext2 aligned process will corrupt the key
data struct, the patch fix this.
Signed-off-by: Dave Liu <[EMAIL PROTECTED]>
---
fs/ext2/dev.c | 16 ++++++++++++++++
1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/fs/ext2/dev.c b/fs/ext2/dev.c
index 643a1a8..1728b34 100644
--- a/fs/ext2/dev.c
+++ b/fs/ext2/dev.c
@@ -96,8 +96,23 @@ int ext2fs_devread (int sector, int byte_offset, int
byte_len, char *buf) {
sector++;
}
+ if (byte_len == 0)
+ return 1;
+
/* read sector aligned part */
block_len = byte_len & ~(SECTOR_SIZE - 1);
+
+ if (block_len == 0) {
+ u8 p[SECTOR_SIZE];
+
+ block_len = SECTOR_SIZE;
+ ext2fs_block_dev_desc->block_read(ext2fs_block_dev_desc->dev,
+ part_info.start + sector,
+ 1, (unsigned long *)p);
+ memcpy(buf, p, byte_len);
+ return 1;
+ }
+
if (ext2fs_block_dev_desc->block_read (ext2fs_block_dev_desc->dev,
part_info.start + sector,
block_len / SECTOR_SIZE,
@@ -106,6 +121,7 @@ int ext2fs_devread (int sector, int byte_offset, int
byte_len, char *buf) {
printf (" ** ext2fs_devread() read error - block\n");
return (0);
}
+ block_len = byte_len & ~(SECTOR_SIZE - 1);
buf += block_len;
byte_len -= block_len;
sector += block_len / SECTOR_SIZE;
--
1.5.4.rc4
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