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Message-ID: <1394415238-20085-1-git-send-email-Li.Xiubo@freescale.com> Date: Mon, 10 Mar 2014 09:33:58 +0800 From: Xiubo Li <Li.Xiubo@...escale.com> To: <airlied@...ux.ie>, <dri-devel@...ts.freedesktop.org> CC: <linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>, Jani Nikula <jani.nikula@...ux.intel.com> Subject: [PATCH v2] drm/fb-helper: Do the 'max_conn_count' zero check Since we cannot make sure the 'max_conn_count' will always be none zero from the users, and then if max_conn_count equals to zero, the kcalloc() will return ZERO_SIZE_PTR, which equals to ((void *)16). So this patch fix this with just doing the 'max_conn_count' zero check in the front of drm_fb_helper_init(). Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com> CC: Jani Nikula <jani.nikula@...ux.intel.com> --- drivers/gpu/drm/drm_fb_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 3d13ca6e2..a0d286c 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -514,6 +514,9 @@ int drm_fb_helper_init(struct drm_device *dev, struct drm_crtc *crtc; int i; + if (!max_conn_count) + return -EINVAL; + fb_helper->dev = dev; INIT_LIST_HEAD(&fb_helper->kernel_fb_list); -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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