Commit 4946d54c authored Apr 05, 2010 by Rik van Riel Committed by Linus Torvalds Apr 05, 2010

rmap: fix anon_vma_fork() memory leak



Fix a memory leak in anon_vma_fork(), where we fail to tear down the
anon_vmas attached to the new VMA in case setting up the new anon_vma
fails.

This bug also has the potential to leave behind anon_vma_chain structs
with pointers to invalid memory.

Reported-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent db217dec

mm/rmap.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -232,6 +232,7 @@ int anon_vma_fork(struct vm_area_struct vma, struct vm_area_struct pvma)
		out_error_free_anon_vma:
		anon_vma_free(anon_vma);
		out_error:
		unlink_anon_vmas(vma);
		return -ENOMEM;
		}

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