Coverity: wilc_parse_join_bss_param(): Memory - illegal accesses

[coverity-bot <keescook@chromium.org>]

Hello!

This is an experimental automated report about issues detected by Coverity
from a scan of next-20191031 as part of the linux-next weekly scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by recent commits:

4e0b0f42c9c7 ("staging: wilc1000: use struct to pack join parameters for FW")

Coverity reported the following:

*** CID 1487400:  Memory - illegal accesses  (OVERRUN)
/drivers/staging/wilc1000/wilc_hif.c: 496 in wilc_parse_join_bss_param()
490     	if (supp_rates_ie) {
491     		if (supp_rates_ie[1] > (WILC_MAX_RATES_SUPPORTED - rates_len))
492     			param->supp_rates[0] = WILC_MAX_RATES_SUPPORTED;
493     		else
494     			param->supp_rates[0] += supp_rates_ie[1];
495
vvv     CID 1487400:  Memory - illegal accesses  (OVERRUN)
vvv     Overrunning array of 13 bytes at byte offset 13 by dereferencing pointer "&param->supp_rates[rates_len + 1]". [Note: The source code implementation of the function has been overridden by a builtin model.]
496     		memcpy(&param->supp_rates[rates_len + 1], supp_rates_ie + 2,
497     		       (param->supp_rates[0] - rates_len));
498     	}
499
500     	ht_ie = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies->data, ies->len);
501     	if (ht_ie)

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1487400 ("Memory - illegal accesses")
Fixes: 4e0b0f42c9c7 ("staging: wilc1000: use struct to pack join parameters for FW")


Thanks for your attention!

-- 
Coverity-bot