[PATCH] drm/ttm: Use scnprintf() for avoiding potential buffer overflow

[Takashi Iwai]

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index bf876faea592..faefaaef7909 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -604,7 +604,7 @@ static struct dma_pool *ttm_dma_pool_init(struct device *dev, gfp_t flags,
 	p = pool->name;
 	for (i = 0; i < ARRAY_SIZE(t); i++) {
 		if (type & t[i]) {
-			p += snprintf(p, sizeof(pool->name) - (p - pool->name),
+			p += scnprintf(p, sizeof(pool->name) - (p - pool->name),
 				      "%s", n[i]);
 		}
 	}
-- 
2.16.4