+ mm-vmallocc-fix-potential-memory-leak.patch added to -mm tree

+ mm-vmallocc-fix-potential-memory-leak.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/vmalloc.c: fix potential memory leak
has been added to the -mm tree.  Its filename is
     mm-vmallocc-fix-potential-memory-leak.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-vmallocc-fix-potential-memory-leak.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmallocc-fix-potential-memory-leak.patch

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/vmalloc.c: fix potential memory leak

In VM_MAP_PUT_PAGES case, we should put pages and free array in vfree. 
But we missed to set area->nr_pages in vmap().  So we would failed to put
pages in __vunmap() because area->nr_pages = 0.

Link: https://lkml.kernel.org/r/20210107123541.39206-1-linmiaohe@huawei.com
Fixes: b944afc9d64d ("mm: add a VM_MAP_PUT_PAGES flag for vmap")
Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/mm/vmalloc.c~mm-vmallocc-fix-potential-memory-leak
+++ a/mm/vmalloc.c
@@ -2420,8 +2420,10 @@ void *vmap(struct page **pages, unsigned
 		return NULL;
 	}
 
-	if (flags & VM_MAP_PUT_PAGES)
+	if (flags & VM_MAP_PUT_PAGES) {
 		area->pages = pages;
+		area->nr_pages = count;
+	}
 	return area->addr;
 }
 EXPORT_SYMBOL(vmap);
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-vmallocc-fix-potential-memory-leak.patch