+ mm-zswap-add-the-flag-can_sleep_mapped-fix-2.patch added to -mm tree

+ mm-zswap-add-the-flag-can_sleep_mapped-fix-2.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/zswap: fix potential memory leak
has been added to the -mm tree.  Its filename is
     mm-zswap-add-the-flag-can_sleep_mapped-fix-2.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-zswap-add-the-flag-can_sleep_mapped-fix-2.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-zswap-add-the-flag-can_sleep_mapped-fix-2.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Tian Tao <tiantao6@hisilicon.com>
Subject: mm/zswap: fix potential memory leak

If entry is NULL, the requested memory tmp should be freed, otherwise it
may cause a memory leak.

Link: https://lkml.kernel.org/r/1611538365-51811-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Barry Song <song.bao.hua@hisilicon.com>
Cc: Seth Jennings <sjenning@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/zswap.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/zswap.c~mm-zswap-add-the-flag-can_sleep_mapped-fix-2
+++ a/mm/zswap.c
@@ -962,6 +962,7 @@ static int zswap_writeback_entry(struct
 		/* entry was invalidated */
 		spin_unlock(&tree->lock);
 		zpool_unmap_handle(pool, handle);
+		kfree(tmp);
 		return 0;
 	}
 	spin_unlock(&tree->lock);
_

Patches currently in -mm which might be from tiantao6@hisilicon.com are

mm-zswap-add-the-flag-can_sleep_mapped.patch
mm-zswap-add-the-flag-can_sleep_mapped-fix-2.patch
mm-zswap-fix-variable-entry-is-uninitialized-when-used.patch
mm-set-the-sleep_mapped-to-true-for-zbud-and-z3fold.patch