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-rw-r--r--print-sflow.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/print-sflow.c b/print-sflow.c
index 37a41b529cd3..dcaf28e8648c 100644
--- a/print-sflow.c
+++ b/print-sflow.c
@@ -881,6 +881,14 @@ sflow_print(netdissect_options *ndo,
tptr = pptr;
tlen = len;
sflow_datagram = (const struct sflow_datagram_t *)pptr;
+ if (len < sizeof(struct sflow_datagram_t)) {
+ ND_TCHECK(sflow_datagram->version);
+ ND_PRINT((ndo, "sFlowv%u", EXTRACT_32BITS(sflow_datagram->version)));
+ ND_PRINT((ndo, " [length %u < %zu]",
+ len, sizeof(struct sflow_datagram_t)));
+ ND_PRINT((ndo, " (invalid)"));
+ return;
+ }
ND_TCHECK(*sflow_datagram);
/*
@@ -916,6 +924,8 @@ sflow_print(netdissect_options *ndo,
/* skip Common header */
tptr += sizeof(const struct sflow_datagram_t);
+
+ if(tlen <= sizeof(const struct sflow_datagram_t)) goto trunc;
tlen -= sizeof(const struct sflow_datagram_t);
while (nsamples > 0 && tlen > 0) {