Commit f022d8cb authored Oct 24, 2014 by Laurent Pinchart Committed by Marek Szyprowski Oct 27, 2014

mm: cma: Don't crash on allocation if CMA area can't be activated



If activation of the CMA area fails its mutex won't be initialized,
leading to an oops at allocation time when trying to lock the mutex. Fix
this by setting the cma area count field to 0 when activation fails,
leading to allocation returning NULL immediately.

Cc: <stable@vger.kernel.org>  # v3.17
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

parent cac7f242

mm/cma.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -124,6 +124,7 @@ static int __init cma_activate_area(struct cma *cma)

		err:
		kfree(cma->bitmap);
		cma->count = 0;
		return -EINVAL;
		}