Re: [PATCH] staging: fbtft: core: fix potential memory leak in fbtft_probe_common()

[Andy Shevchenko]

On Wed, Sep 28, 2022 at 02:23:01PM +0800, Jianglei Nie wrote:
> fbtft_probe_common() allocates a memory chunk for "info" with
> fbtft_framebuffer_alloc(). When "display->buswidth == 0" is true, the
> function returns without releasing the "info", which will lead to a
> memory leak.
> 
> Fix it by calling fbtft_framebuffer_release() when "display->buswidth
> == 0" is true.

Fixes tag?

...

>   if (display->buswidth == 0) {
>   dev_err(dev, "buswidth is not set\n");
> + fbtft_framebuffer_release(info);
>   return -EINVAL;

ret = dev_err_probe(dev, -EINVAL, "buswidth is not set\n");
goto out_release;

>   }

-- 
With Best Regards,
Andy Shevchenko

[PATCH] staging: fbtft: core: fix potential memory leak in fbtft_probe_common()

[Jianglei Nie]

fbtft_probe_common() allocates a memory chunk for "info" with
fbtft_framebuffer_alloc(). When "display->buswidth == 0" is true, the
function returns without releasing the "info", which will lead to a
memory leak.

Fix it by calling fbtft_framebuffer_release() when "display->buswidth
== 0" is true.

Signed-off-by: Jianglei Nie 
---
 drivers/staging/fbtft/fbtft-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/fbtft/fbtft-core.c 
b/drivers/staging/fbtft/fbtft-core.c
index afaba94d1d1c..ecf595aff786 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -1225,6 +1225,7 @@ int fbtft_probe_common(struct fbtft_display *display,
 
if (display->buswidth == 0) {
dev_err(dev, "buswidth is not set\n");
+   fbtft_framebuffer_release(info);
return -EINVAL;
}
 
-- 
2.25.1