journal-file: check asprintf return value in the usual fashion

This is unlikely to fail, but we cannot rely on asprintf return value
on failure, so let's just be correct here.

CID #1368236.

diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index d3e0214..bb14437 100644 (file)
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -3087,13 +3087,18 @@ int journal_file_open(
                 }
         }
 
-        if (fname)
+        if (fname) {
                 f->path = strdup(fname);
-        else /* If we don't know the path, fill in something explanatory and vaguely useful */
-                asprintf(&f->path, "/proc/self/%i", fd);
-        if (!f->path) {
-                r = -ENOMEM;
-                goto fail;
+                if (!f->path) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
+        } else {
+                /* If we don't know the path, fill in something explanatory and vaguely useful */
+                if (asprintf(&f->path, "/proc/self/%i", fd) < 0) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
         }
 
         f->chain_cache = ordered_hashmap_new(&uint64_hash_ops);