From: Liam R. Howlett <Liam.Howlett@oracle.com>
Date: Wed, 27 Apr 2022 22:40:00 +0000 (-0400)
Subject: mm/mmap: Fix __vma_adjust() memory leak.
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=74f551227d44b351d56f4ec0a36542d871f337d5;p=users%2Fjedix%2Flinux-maple.git

mm/mmap: Fix __vma_adjust() memory leak.

When shifting the arg pages, the maple state may be left with allocated
memory.  Free the memory by calling mas_destroy() unconditionally at the
end of the function.

Fixes: bd6a1fd58daf (mm: start tracking VMAs with maple tree)
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---

diff --git a/mm/mmap.c b/mm/mmap.c
index 6a37f5d2e4963..f52bbf9aa0245 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -904,6 +904,7 @@ again:
 		uprobe_mmap(insert);
 	}
 
+	mas_destroy(&mas);
 	validate_mm(mm);
 
 	return 0;