[PATCH 4.18 112/145] ubifs: Fix memory leak in lprobs self-check

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Richard Weinberger <rich...@nod.at>

commit eef19816ada3abd56d9f20c88794cc2fea83ebb2 upstream.

Allocate the buffer after we return early.
Otherwise memory is being leaked.

Cc: <sta...@vger.kernel.org>
Fixes: 1e51764a3c2a ("UBIFS: add new flash file system")
Signed-off-by: Richard Weinberger <rich...@nod.at>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 fs/ubifs/lprops.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -1089,10 +1089,6 @@ static int scan_check_cb(struct ubifs_in
                }
        }
 
-       buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
-       if (!buf)
-               return -ENOMEM;
-
        /*
         * After an unclean unmount, empty and freeable LEBs
         * may contain garbage - do not scan them.
@@ -1111,6 +1107,10 @@ static int scan_check_cb(struct ubifs_in
                return LPT_SCAN_CONTINUE;
        }
 
+       buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+       if (!buf)
+               return -ENOMEM;
+
        sleb = ubifs_scan(c, lnum, 0, buf, 0);
        if (IS_ERR(sleb)) {
                ret = PTR_ERR(sleb);