[gpsd-dev] [PATCH] Improved resilience in gps_shm_close() in case it is called after an unsuccessful gps_shm_open()

[Robert Norris]

Check that the structure exists before trying to use a component of it.
---
 libgps_shm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libgps_shm.c b/libgps_shm.c
index b256249..e0aa3ab 100644
--- a/libgps_shm.c
+++ b/libgps_shm.c
@@ -153,7 +153,7 @@ int gps_shm_read(struct gps_data_t *gpsdata)
 
 void gps_shm_close(struct gps_data_t *gpsdata)
 {
-    if (PRIVATE(gpsdata)->shmseg != NULL)
+    if (PRIVATE(gpsdata) && PRIVATE(gpsdata)->shmseg != NULL)
        (void)shmdt((const void *)PRIVATE(gpsdata)->shmseg);
 }
 
-- 
2.8.1