Hi,
Thank you for your patch.
On 9/17/24 2:04 PM, Aleksandr Burakov wrote:
> No upstream commit exists for this commit.
Right, which is bad, especially since the upstream code actually still has this bug.
NACK.
Note that upstream in drivers/platform/x86/x86-android-tablets/core.c
the same issue is also present around line 447:
pdevs[pdev_count] = platform_device_register_data(&pdev->dev, "gpio-keys",
PLATFORM_DEVID_AUTO,
&pdata, sizeof(pdata));
if (IS_ERR(pdevs[pdev_count])) {
x86_android_tablet_remove(pdev);
return PTR_ERR(pdevs[pdev_count]);
}
pdev_count++;
Please submit a fix for both issues upstream, once that has been merged
you can submit a backport with a proper upstream commit reference.
Regards,
Hans
>
> Pointer '&pdevs[i]' is dereferenced at x86_android_tablet_init()
> after the referenced memory was deallocated by calling function
> 'x86_android_tablet_cleanup()'.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Fixes: 5eba0141206e ("platform/x86: x86-android-tablets: Add support for instantiating platform-devs")
> Signed-off-by: Aleksandr Burakov <a.burakov@xxxxxxxxxxxx>
> ---
> drivers/platform/x86/x86-android-tablets.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
> index 9178076d9d7d..9838c5332201 100644
> --- a/drivers/platform/x86/x86-android-tablets.c
> +++ b/drivers/platform/x86/x86-android-tablets.c
> @@ -1853,8 +1853,9 @@ static __init int x86_android_tablet_init(void)
> for (i = 0; i < pdev_count; i++) {
> pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]);
> if (IS_ERR(pdevs[i])) {
> + int ret = PTR_ERR(pdevs[i]);
> x86_android_tablet_cleanup();
> - return PTR_ERR(pdevs[i]);
> + return ret;
> }
> }
>
