NOMMU: Lock i_mmap_mutex for access to the VMA prio list
Lock i_mmap_mutex for access to the VMA prio list to prevent concurrent access. Currently, certain parts of the mmap handling are protected by the region mutex, but not all. Reported-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NAl Viro <viro@zeniv.linux.org.uk> cc: stable@vger.kernel.org Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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