The length filed in the chsc response block (if valid)
has a value of n*(sizeof(chp_desc))+8 (for the response
block header). When we memcopied from the response block
to the actual descriptor we copied 8 bytes too much.
The bug was not revealed since the descriptor is embedded
in struct channel_path.
Since we only write one descriptor at a time ignore the
length value and use sizeof(*desc).
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp);
if (ret)
goto out_free;
- memcpy(desc, &chsc_resp->data, chsc_resp->length);
+ memcpy(desc, &chsc_resp->data, sizeof(*desc));
out_free:
kfree(chsc_resp);
return ret;