fix leak on error, found by coverity.

diff --git a/src/compress.c b/src/compress.c
index 5d565d56089ec31a2603f0eae1237cbca545753f..ec26595b52a99355a205ef0d8949435673c60c89 100644 (file)
--- a/src/compress.c
+++ b/src/compress.c
@@ -35,7 +35,7 @@
 #include "file.h"
 
 #ifndef lint
-FILE_RCSID("@(#)$File: compress.c,v 1.107 2018/04/28 18:48:22 christos Exp $")
+FILE_RCSID("@(#)$File: compress.c,v 1.108 2018/08/01 09:59:45 christos Exp $")
 #endif
 
 #include "magic.h"
@@ -264,8 +264,11 @@ file_zmagic(struct magic_set *ms, const struct buffer *b, const char *name)
                         * XXX: If file_buffer fails here, we overwrite
                         * the compressed text. FIXME.
                         */
-                       if (file_buffer(ms, -1, NULL, buf, nbytes) == -1)
+                       if (file_buffer(ms, -1, NULL, buf, nbytes) == -1) {
+                               if (file_pop_buffer(ms, pb) != NULL)
+                                       abort();
                                goto error;
+                       }
                        if ((rbuf = file_pop_buffer(ms, pb)) != NULL) {
                                if (file_printf(ms, "%s", rbuf) == -1) {
                                        free(rbuf);