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[network-data] fix FindTlv() to return NULL when TLV sequence is malformed (#4771)

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This commit is contained in:
Abtin Keshavarzian
2020-04-01 10:23:11 -07:00
committed by GitHub
parent 8423ed3042
commit 3579a68b93
1 changed files with 2 additions and 2 deletions
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src/core/thread/network_data.cpp
+2 -2
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@@ -66,7 +66,7 @@ NetworkDataTlv *NetworkData::FindTlv(NetworkDataTlv *aStart, NetworkDataTlv *aEn
for (tlv = aStart; tlv < aEnd; tlv = tlv->GetNext())
{
VerifyOrExit((tlv + 1) <= aEnd && tlv->GetNext() <= aEnd);
VerifyOrExit((tlv + 1) <= aEnd && tlv->GetNext() <= aEnd, tlv = NULL);
if (tlv->GetType() == aType)
{
@@ -89,7 +89,7 @@ NetworkDataTlv *NetworkData::FindTlv(NetworkDataTlv * aStart,
for (tlv = aStart; tlv < aEnd; tlv = tlv->GetNext())
{
VerifyOrExit((tlv + 1) <= aEnd && tlv->GetNext() <= aEnd);
VerifyOrExit((tlv + 1) <= aEnd && tlv->GetNext() <= aEnd, tlv = NULL);
if ((tlv->GetType() == aType) && (tlv->IsStable() == aStable))
{