Commit 80be727e authored Jan 09, 2023 by Liam Howlett Committed by Andrew Morton Jan 11, 2023

nommu: fix do_munmap() error path

When removing a VMA from the tree fails due to no memory, do not free the
VMA since a reference still exists.

Link: https://lkml.kernel.org/r/20230109205708.956103-1-Liam.Howlett@oracle.com

Fixes: 8220543d ("nommu: remove uses of VMA linked list")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yu Zhao <yuzhao@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 7f31cced

mm/nommu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1509,6 +1509,7 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len, struct list
		erase_whole_vma:
		if (delete_vma_from_mm(vma))
		ret = -ENOMEM;
		else
		delete_vma(mm, vma);
		return ret;
		}