af_packet driver must check that VLIB_BUFFER_NEXT_PRESENT flag is set
when walking vlib_buffer_t next_buffer chain on transmit.
On buffer allocation:
- next_buffer is not and may contain a stale invalid value that
should be ignored if not overwritten by a valid value.
- VLIB_BUFFER_NEXT_PRESENT flag is cleared and only set
if a valid value is written to next_buffer.
Change-Id: Iebf76ce8eea24a0d63c7bf749e672d6a232c80e7
Signed-off-by: Jim Gibson <gibson+fdio@cisco.com>
vlib_buffer_get_current (b0), len);
offset += len;
}
- while ((bi = b0->next_buffer));
+ while ((bi =
+ (b0->flags & VLIB_BUFFER_NEXT_PRESENT) ? b0->next_buffer : 0));
tph->tp_len = tph->tp_snaplen = offset;
tph->tp_status = TP_STATUS_SEND_REQUEST;