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>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 78c3c2097787..46d269e38706 100644
--- 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;