From: Stefan Brüns Date: Sat, 17 Sep 2016 00:10:09 +0000 (+0200) Subject: ext4: Use correct descriptor size when reading the block group descriptor X-Git-Tag: v2016.11-rc1~76 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=f798b1dda1c5de818b806189e523d1b75db7e72d;p=u-boot ext4: Use correct descriptor size when reading the block group descriptor The correct descriptor size must be used when calculating offsets, and also to read the correct amount of data. Signed-off-by: Stefan Brüns --- diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 81740f8c66..b745d8d450 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -1527,20 +1527,20 @@ static int ext4fs_blockgroup long int blkno; unsigned int blkoff, desc_per_blk; int log2blksz = get_fs()->dev_desc->log2blksz; + int desc_size = get_fs()->gdsize; - desc_per_blk = EXT2_BLOCK_SIZE(data) / sizeof(struct ext2_block_group); + desc_per_blk = EXT2_BLOCK_SIZE(data) / desc_size; blkno = le32_to_cpu(data->sblock.first_data_block) + 1 + group / desc_per_blk; - blkoff = (group % desc_per_blk) * sizeof(struct ext2_block_group); + blkoff = (group % desc_per_blk) * desc_size; debug("ext4fs read %d group descriptor (blkno %ld blkoff %u)\n", group, blkno, blkoff); return ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) - log2blksz), - blkoff, sizeof(struct ext2_block_group), - (char *)blkgrp); + blkoff, desc_size, (char *)blkgrp); } int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)