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qcacld 3.0: Address buffer overflow due to invalid length

Browse source 
qcacld-2.0 to qcacld-3.0 propagation
Check for valid length before copying the packet filter data from
userspace buffer to kernel space buffer to avoid buffer overflow
issue.

Change-Id: I9548727543b903b5eaafa25c6184615d511ca99d
CRs-Fixed: 930533
This commit is contained in:
Rajeev Kumar 2016-04-15 13:24:03 -07:00 • committed by Gerrit - the friendly Code Review server
commit f5b6da2359
1 changed files with 7 additions and 0 deletions
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7
core/hdd/src/wlan_hdd_wext.c
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@ -8921,6 +8921,13 @@ static int wlan_hdd_set_filter(hdd_context_t *hdd_ctx,
request->params_data[i].data_offset,
request->params_data[i].data_length);
if (sizeof(packetFilterSetReq.paramsData[i].compareData)
< (request->params_data[i].data_length)) {
hdd_err("Error invalid data length %d",
request->params_data[i].data_length);
return -EINVAL;
}
memcpy(&packetFilterSetReq.paramsData[i].compareData,
request->params_data[i].compare_data,
request->params_data[i].data_length);