firmware-utils: fix coverity zytrx.c resource leak

fix coverity resource leak warning:

    	*len = stat.st_size;
    	mapped = mmap(NULL, stat.st_size, PROT_READ, MAP_SHARED, fd, 0);
    	if (close(fd) < 0)
CID 1484880:  Resource leaks  (RESOURCE_LEAK)
Variable "mapped" going out of scope leaks the storage it points to.
    		return NULL;
    	return mapped;
    }

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
(cherry picked from commit baf2a50ef3cf34574e12d2ab1b23578310f0d527)

diff --git a/tools/firmware-utils/src/zytrx.c b/tools/firmware-utils/src/zytrx.c
index 302efc601065cdbb79f0a9a0c2271819fe978888..716767920657c342c51ab38b86348aaf8b889234 100644 (file)
--- a/tools/firmware-utils/src/zytrx.c
+++ b/tools/firmware-utils/src/zytrx.c
@@ -150,8 +150,10 @@ static void *map_input(const char *name, size_t *len)
        }
        *len = stat.st_size;
        mapped = mmap(NULL, stat.st_size, PROT_READ, MAP_SHARED, fd, 0);
-       if (close(fd) < 0)
+       if (close(fd) < 0) {
+               (void) munmap(mapped, stat.st_size);
                return NULL;
+       }
        return mapped;
 }