From: Benjamin Lim jarsp.ctf@gmail.com

Signed-off-by: Benjamin Lim jarsp.ctf@gmail.com --- fs/ext4/ext4_common.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 67e2471bd3..8638ef3b68 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -1584,7 +1584,7 @@ static int ext4fs_blockgroup

int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode) { - struct ext2_block_group blkgrp; + struct ext2_block_group *blkgrp; struct ext2_sblock *sblock = &data->sblock; struct ext_filesystem *fs = get_fs(); int log2blksz = get_fs()->dev_desc->log2blksz; @@ -1592,17 +1592,28 @@ int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode) long int blkno; unsigned int blkoff;

+ /* Allocate blkgrp based on gdsize (for 64-bit support). */ + blkgrp = zalloc(get_fs()->gdsize); + if (!blkgrp) + return 0; + /* It is easier to calculate if the first inode is 0. */ ino--; status = ext4fs_blockgroup(data, ino / le32_to_cpu - (sblock->inodes_per_group), &blkgrp); - if (status == 0) + (sblock->inodes_per_group), blkgrp); + if (status == 0) { + free(blkgrp); return 0; + }

inodes_per_block = EXT2_BLOCK_SIZE(data) / fs->inodesz; - blkno = ext4fs_bg_get_inode_table_id(&blkgrp, fs) + + blkno = ext4fs_bg_get_inode_table_id(blkgrp, fs) + (ino % le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block; blkoff = (ino % inodes_per_block) * fs->inodesz; + + /* Free blkgrp as it is no longer required. */ + free(blkgrp); + /* Read the inode. */ status = ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) - log2blksz), blkoff,