vma_adjust: fix the copying of anon_vma chains

When we move the boundaries between two vma's due to things like
mprotect, we need to make sure that the anon_vma of the pages that got
moved from one vma to another gets properly copied around.  And that was
not always the case, in this rather hard-to-follow code sequence.

Clarify the code, and fix it so that it copies the anon_vma from the
right source.

Reviewed-by: Rik van Riel <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Tested-by: Borislav Petkov <[email protected]> [ "Yeah, not so much this one either" ]
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions