libctf: fix double-free on ctf_compress_write error path

We were freeing the compressed data buffer twice if compression failed.

libctf/
	* ctf-create.c (ctf_compress_write): Fix double-free.

diff --git a/libctf/ChangeLog b/libctf/ChangeLog
index bb75f9d6423ed6d079cbcf57979c93065db18eeb..1315f4dc384fd40d34ac6989b478275c3c548c00 100644 (file)
--- a/libctf/ChangeLog
+++ b/libctf/ChangeLog
@@ -1,3 +1,7 @@
+2019-07-13  Nick Alcock  <nick.alcock@oracle.com>
+
+       * ctf-create.c (ctf_compress_write): Fix double-free.
+
 2019-07-13  Nick Alcock  <nick.alcock@oracle.com>
 
        * ctf-archive.c (ctf_arc_write): Split off, and reimplement in terms

diff --git a/libctf/ctf-create.c b/libctf/ctf-create.c
index 6189042fdb01865a9c320340cf1843ec0772d783..76304f724c76cd039c644145b5f973ff07ff5b0f 100644 (file)
--- a/libctf/ctf-create.c
+++ b/libctf/ctf-create.c
@@ -1997,7 +1997,6 @@ ctf_compress_write (ctf_file_t *fp, int fd)
     {
       ctf_dprintf ("zlib deflate err: %s\n", zError (rc));
       err = ctf_set_errno (fp, ECTF_COMPRESS);
-      ctf_free (buf);
       goto ret;
     }