pstore: Fix memory leak when decompress using big_oops_buf

After sucessful decompressing, the buffer which pointed by 'buf' will be
lost as 'buf' is overwrite by 'big_oops_buf' and will never be freed.

Signed-off-by: Liu ShuoX <shuox.liu@intel.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 78c3c2097787a1be2ea2bd1757a6c6e5554df72c..46d269e3870652104f2f4b2d52d6643a9250b15b 100644 (file)
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -497,6 +497,7 @@ void pstore_get_records(int quiet)
                                                        big_oops_buf_sz);
 
                        if (unzipped_len > 0) {
+                               kfree(buf);
                                buf = big_oops_buf;
                                size = unzipped_len;
                                compressed = false;