Using fs->blksz in ext4fs_get_extent_block() is not correct since fs->blksz is not initialized on the read path. Use EXT2_BLOCK_SIZE() instead which will produce the desired output.

Signed-off-by: Ionut Nicu ioan.nicu.ext@nsn.com Signed-off-by: Mathias Rulf mathias.rulf@nsn.com --- fs/ext4/ext4_common.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 352943e..37b6c46 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -1414,7 +1414,7 @@ static struct ext4_extent_header *ext4fs_get_extent_block { struct ext4_extent_idx *index; unsigned long long block; - struct ext_filesystem *fs = get_fs(); + int blksz = EXT2_BLOCK_SIZE(data); int i;

while (1) { @@ -1438,7 +1438,7 @@ static struct ext4_extent_header *ext4fs_get_extent_block 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, + if (ext4fs_devread((lbaint_t)block << log2_blksz, 0, blksz, buf)) ext_block = (struct ext4_extent_header *)buf; else