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sccp_sap_up(): guard against NULL pointers 

Change-Id: Icd64b92b00461cace5c476c8bcf69eec3fdbbdd3
This commit is contained in:
Neels Hofmeyr 2017-06-20 22:49:34 +02:00
parent 0f88c11009
commit cb24631650
1 changed files with 16 additions and 1 deletions
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17
src/hnbgw_cn.c
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@ -327,12 +327,27 @@ static int handle_cn_disc_ind(struct hnbgw_cnlink *cnlink,
static int sccp_sap_up(struct osmo_prim_hdr *oph, void *ctx)
{
struct osmo_sccp_user *scu = ctx;
struct hnbgw_cnlink *cnlink = osmo_sccp_user_get_priv(scu);
struct hnbgw_cnlink *cnlink;
struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph;
int rc;
LOGP(DMAIN, LOGL_DEBUG, "sccp_sap_up(%s)\n", osmo_scu_prim_name(oph));
if (!scu) {
LOGP(DMAIN, LOGL_ERROR,
"sccp_sap_up(): NULL osmo_sccp_user, cannot send prim (sap %u prim %u op %d)\n",
oph->sap, oph->primitive, oph->operation);
return -1;
}
cnlink = osmo_sccp_user_get_priv(scu);
if (!cnlink) {
LOGP(DMAIN, LOGL_ERROR,
"sccp_sap_up(): NULL hnbgw_cnlink, cannot send prim (sap %u prim %u op %d)\n",
oph->sap, oph->primitive, oph->operation);
return -1;
}
switch (OSMO_PRIM_HDR(oph)) {
case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
rc = handle_cn_unitdata(cnlink, &prim->u.unitdata, oph);