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staging: rtl8723au: fix potential leak in update_bcn_wps_ie()

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Fix a potential leak in the error path of function update_bcn_wps_ie().
Move the affected input verification to the beginning of the function so
that it may return directly without leaking already allocated memory.
Detected by Coverity - CID 1077718.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Engelmayer 2014-05-09 15:03:50 +02:00 committed by Greg Kroah-Hartman
parent 6e8bc71df6
commit 086f7a4d17
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/rtl8723au/core/rtw_ap.c
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@ -1252,6 +1252,10 @@ static void update_bcn_wps_ie(struct rtw_adapter *padapter)
DBG_8723A("%s\n", __func__);
pwps_ie_src = pmlmepriv->wps_beacon_ie;
if (pwps_ie_src == NULL)
return;
pwps_ie = rtw_get_wps_ie23a(ie+_FIXED_IE_LENGTH_, ielen-_FIXED_IE_LENGTH_, NULL, &wps_ielen);
if (pwps_ie == NULL || wps_ielen == 0)
@ -1270,10 +1274,6 @@ static void update_bcn_wps_ie(struct rtw_adapter *padapter)
remainder_ielen);
}
pwps_ie_src = pmlmepriv->wps_beacon_ie;
if (pwps_ie_src == NULL)
return;
wps_ielen = (uint)pwps_ie_src[1];/* to get ie data len */
if ((wps_offset+wps_ielen+2+remainder_ielen)<= MAX_IE_SZ)
{