If no framebuffers found, sm501fb_probe() breaks off initialization, deallocates sm501fb_info, but returns zero. As a result, use after free can happen in sm501fb_remove().
The patch adds -ENODEV as a return value in this case. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <[email protected]> --- drivers/video/fbdev/sm501fb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c index 9e74e8fbe074..8b98b011fc04 100644 --- a/drivers/video/fbdev/sm501fb.c +++ b/drivers/video/fbdev/sm501fb.c @@ -1988,6 +1988,7 @@ static int sm501fb_probe(struct platform_device *pdev) if (info->fb[HEAD_PANEL] == NULL && info->fb[HEAD_CRT] == NULL) { dev_err(dev, "no framebuffers found\n"); + ret = -ENODEV; goto err_alloc; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
