Always check asprintf return code

There is a small number of the places in sources where we don't check
asprintf() return code and assume that after error the function
returns NULL pointer via the first argument. That's wrong, after
error the content of pointer is undefined.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
index a67d85e623..67dc88fa51 100644
--- a/src/cryptsetup/cryptsetup.c
+++ b/src/cryptsetup/cryptsetup.c
@@ -549,13 +549,18 @@ int main(int argc, char *argv[]) {
                         description = NULL;
                 }
 
+                k = 0;
                 if (mount_point && description)
-                        asprintf(&name_buffer, "%s (%s) on %s", description, argv[2], mount_point);
+                        k = asprintf(&name_buffer, "%s (%s) on %s", description, argv[2], mount_point);
                 else if (mount_point)
-                        asprintf(&name_buffer, "%s on %s", argv[2], mount_point);
+                        k = asprintf(&name_buffer, "%s on %s", argv[2], mount_point);
                 else if (description)
-                        asprintf(&name_buffer, "%s (%s)", description, argv[2]);
+                        k = asprintf(&name_buffer, "%s (%s)", description, argv[2]);
 
+                if (k < 0) {
+                        log_oom();
+                        goto finish;
+                }
                 name = name_buffer ? name_buffer : argv[2];
 
                 k = crypt_init(&cd, argv[3]);