tcmu: Fix possible overwrite of t_data_sg's last iov[]

If there has BIDI data, its first iov[] will overwrite the last
iov[] for se_cmd->t_data_sg.

To fix this, we can just increase the iov pointer, but this may
introuduce a new memory leakage bug: If the se_cmd->data_length
and se_cmd->t_bidi_data_sg->length are all not aligned up to the
DATA_BLOCK_SIZE, the actual length needed maybe larger than just
sum of them.

So, this could be avoided by rounding all the data lengthes up
to DATA_BLOCK_SIZE.

Reviewed-by: Mike Christie <[email protected]>
Tested-by: Ilias Tsitsimpis <[email protected]>
Reviewed-by: Bryant G. Ly <[email protected]>
Signed-off-by: Xiubo Li <[email protected]>
Cc: [email protected] # 3.18+
Signed-off-by: Nicholas Bellinger <[email protected]>

0 files changed, 0 insertions, 0 deletions