[PATCH] osmo-bts[master]: paging: Drop + Log paging requests for non-existant paging g...

[Harald Welte]

Review at  https://gerrit.osmocom.org/6880

paging: Drop + Log paging requests for non-existant paging groups

Change-Id: Id02c8fea51c1260f1baae8566c67bafc5bdb970e
Related: OS#2992
---
M src/common/paging.c
1 file changed, 9 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/80/6880/1

diff --git a/src/common/paging.c b/src/common/paging.c
index d796176..c5c23d7 100644
--- a/src/common/paging.c
+++ b/src/common/paging.c
@@ -35,6 +35,7 @@
 
 #include <osmocom/gsm/protocol/gsm_04_08.h>
 #include <osmocom/gsm/gsm0502.h>
+#include <osmocom/gsm/gsm48.h>
 
 #include <osmo-bts/bts.h>
 #include <osmo-bts/rsl.h>
@@ -177,10 +178,18 @@
 			const uint8_t *identity_lv, uint8_t chan_needed)
 {
 	struct llist_head *group_q = &ps->paging_queue[paging_group];
+	int blocks = gsm48_number_of_paging_subchannels(&ps->chan_desc);
 	struct paging_record *pr;
 
 	rate_ctr_inc2(ps->btsb->bts->ctrs, BTS_CTR_PAGING_RCVD);
 
+	if (paging_group >= blocks) {
+		LOGP(DPAG, LOGL_ERROR, "BSC Send PAGING for group %u, but number of paging "
+			"sub-channels is only %u\n", paging_group, blocks);
+		rate_ctr_inc2(ps->btsb->bts->ctrs, BTS_CTR_PAGING_DROP);
+		return -EINVAL;
+	}
+
 	if (ps->num_paging >= ps->num_paging_max) {
 		LOGP(DPAG, LOGL_NOTICE, "Dropping paging, queue full (%u)\n",
 			ps->num_paging);

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Id02c8fea51c1260f1baae8566c67bafc5bdb970e
Gerrit-PatchSet: 1
Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>