net/bonding: fix buffer corruption in packets

net/bonding: fix buffer corruption in packets

When bond slave devices cannot transmit all packets in bufs array,
tx_burst callback shall merge the un-transmitted packets back to
bufs array. Recent merge logic introduced a bug which causes
invalid mbuf addresses being written to bufs array.
When caller frees the un-transmitted packets, due to invalid addresses,
application will crash.

The fix is avoid shifting mbufs, and directly write un-transmitted
packets back to bufs array.

Fixes: 09150784a776 ("net/bonding: burst mode hash calculation")
Cc: stable@dpdk.org
Signed-off-by: Jia Yu <jyu@vmware.com>
Acked-by: Chas Williams <chas3@att.com>