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libbsc: fix potential null-dereference in abis_nm_perform_test()

Change-Id: I93d816a20ba208e9fd32a1fc172a78ccd326e1ba
Related: OS#5450
---
M openbsc/src/libbsc/abis_nm.c
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/openbsc refs/changes/44/27144/1

diff --git a/openbsc/src/libbsc/abis_nm.c b/openbsc/src/libbsc/abis_nm.c
index 922c2d5..c1e2b53 100644
--- a/openbsc/src/libbsc/abis_nm.c
+++ b/openbsc/src/libbsc/abis_nm.c
@@ -1993,6 +1993,8 @@
 
 	if (!msg)
 		msg = nm_msgb_alloc();
+	if (!msg)
+		return -ENOMEM;
 
 	msgb_tv_push(msg, NM_ATT_AUTON_REPORT, auton_report);
 	msgb_tv_push(msg, NM_ATT_TEST_NO, test_nr);

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