From 74f551227d44b351d56f4ec0a36542d871f337d5 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Wed, 27 Apr 2022 18:40:00 -0400 Subject: [PATCH] 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 --- mm/mmap.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/mmap.c b/mm/mmap.c index 6a37f5d2e496..f52bbf9aa024 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -904,6 +904,7 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start, uprobe_mmap(insert); } + mas_destroy(&mas); validate_mm(mm); return 0; -- 2.35.1