[Cbe-oss-dev] [PATCH] spufs: fix to reject an access when SPE touched unused stack

[Masato Noguchi]

This patch fix to reject demand of spe to dma form/to unused stack
region.  Currently, if spe accessed to unused stack (or any addresses
beyond the highest mmaped region) by mistake, the process will meet
BUG_ON() in exit_mmap().

Signed-off-by: Masato Noguchi <Masato.Noguchi at jp.sony.com>
---
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 7f35eab..9dcc1da 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -448,6 +448,8 @@ static int spu_handle_mm_fault(struct spu *spu)
 #if 0
 	if (expand_stack(vma, ea))
 		goto bad_area;
+#else
+	goto bad_area;
 #endif /* XXX */
 good_area:
 	is_write = dsisr & MFC_DSISR_ACCESS_PUT;