gprs_ns2_frgre: check iph/ip6h before passing them to rx functions

With IPv4 and IPv6 support it's not guaranteed that iph/ip6h is valid.

Related CID#214288

Change-Id: If9015906917e3ad11d14b84c29d64f28a3158144
changes/48/22648/4
Alexander Couzens 2 years ago
parent 47ed2a6b4a
commit dc43f7d3c7
  1. 10
      src/gb/gprs_ns2_frgre.c

@ -351,11 +351,17 @@ static struct msgb *read_nsfrgre_msg(struct osmo_fd *bfd, int *error,
switch (osmo_ntohs(greh->ptype)) {
case GRE_PTYPE_IPv4:
/* IPv4 messages might be GRE keepalives */
*error = handle_rx_gre_ipv4(bfd, msg, iph, greh);
if (iph)
*error = handle_rx_gre_ipv4(bfd, msg, iph, greh);
else
*error = -EIO;
goto out_err;
break;
case GRE_PTYPE_IPv6:
*error = handle_rx_gre_ipv6(bfd, msg, ip6h, greh);
if (ip6h)
*error = handle_rx_gre_ipv6(bfd, msg, ip6h, greh);
else
*error = -EIO;
goto out_err;
break;
case GRE_PTYPE_FR:

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