fixeria submitted this change.

Approvals:
  laforge: Looks good to me, approved
  pespin: Looks good to me, but someone else must approve
  Jenkins Builder: Verified

abis_rsl: fix NULL pointer dereference in abis_rsl_rx_rll()

Found with GCC's static analyzer (-fanalyzer).

Change-Id: I620538388f6971418980b03a6a1b2384e7c87e15
---
M src/osmo-bsc/abis_rsl.c
1 file changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/osmo-bsc/abis_rsl.c b/src/osmo-bsc/abis_rsl.c
index b5375e0..94b6349 100644
--- a/src/osmo-bsc/abis_rsl.c
+++ b/src/osmo-bsc/abis_rsl.c
@@ -2520,6 +2520,8 @@
 
 	sapi = rllh->link_id & 0x7;
 	msg->lchan = lchan_lookup(sign_link->trx, rllh->chan_nr, "Abis RSL rx RLL: ");
+	if (OSMO_UNLIKELY(msg->lchan == NULL))
+		return -1;
 
 	switch (rllh->c.msg_type) {
 	case RSL_MT_DATA_IND:

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