Описание
In the Linux kernel, the following vulnerability has been resolved:
gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()
Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"),
gdev->dev.release is unset. As a result, the reference count to
gdev->dev isn't dropped on the error handling paths.
Drop the reference on errors.
Also reorder the instructions to make the error handling simpler. Now gpiochip_add_data_with_key() roughly looks like:
Some memory allocation. Go to ERR ZONE 1 on errors. device_initialize().
gpiodev_release() takes over the responsibility for freeing the
resources of gdev->dev. The subsequent error handling paths
shouldn't go through ERR ZONE 1 again which leads to double free.
Some initialization mainly on
gdev. The rest of initialization. Go to ERR ZONE 2 on errors. Chip registration success and exit.
ERR ZONE 2. gpio_device_put() and exit. ERR ZONE 1.
In the Linux kernel, the following vulnerability has been resolved:
gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()
Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"),
gdev->dev.release is unset. As a result, the reference count to
gdev->dev isn't dropped on the error handling paths.
Drop the reference on errors.
Also reorder the instructions to make the error handling simpler. Now gpiochip_add_data_with_key() roughly looks like:
Some memory allocation. Go to ERR ZONE 1 on errors. device_initialize().
gpiodev_release() takes over the responsibility for freeing the
resources of gdev->dev. The subsequent error handling paths
shouldn't go through ERR ZONE 1 again which leads to double free.
Some initialization mainly on
gdev. The rest of initialization. Go to ERR ZONE 2 on errors. Chip registration success and exit.
ERR ZONE 2. gpio_device_put() and exit. ERR ZONE 1.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2026-31732
- https://git.kernel.org/stable/c/16fdabe143fce2cbf89139677728e17e21b46c28
- https://git.kernel.org/stable/c/a500e1837c4266ddb05b39b3e1cc71f49a43ffa5
- https://git.kernel.org/stable/c/f0cf9c7b7c281956cc0dec163132cd96f76e1d60
- https://git.kernel.org/stable/c/fb4584d2b324c522404c733c65840a1a6519ada8
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: gpio: Fix resource leaks on errors in gpiochip_add_data_with_key() Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"), `gdev->dev.release` is unset. As a result, the reference count to `gdev->dev` isn't dropped on the error handling paths. Drop the reference on errors. Also reorder the instructions to make the error handling simpler. Now gpiochip_add_data_with_key() roughly looks like: >>> Some memory allocation. Go to ERR ZONE 1 on errors. >>> device_initialize(). gpiodev_release() takes over the responsibility for freeing the resources of `gdev->dev`. The subsequent error handling paths shouldn't go through ERR ZONE 1 again which leads to double free. >>> Some initialization mainly on `gdev`. >>> The rest of initialization. Go to ERR ZONE 2 on errors. >>> Chip registration success and exit. >>> ERR ZONE 2. gpio_device_put() and exit. >>> ERR ZONE 1.
In the Linux kernel, the following vulnerability has been resolved: gpio: Fix resource leaks on errors in gpiochip_add_data_with_key() Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"), `gdev->dev.release` is unset. As a result, the reference count to `gdev->dev` isn't dropped on the error handling paths. Drop the reference on errors. Also reorder the instructions to make the error handling simpler. Now gpiochip_add_data_with_key() roughly looks like: >>> Some memory allocation. Go to ERR ZONE 1 on errors. >>> device_initialize(). gpiodev_release() takes over the responsibility for freeing the resources of `gdev->dev`. The subsequent error handling paths shouldn't go through ERR ZONE 1 again which leads to double free. >>> Some initialization mainly on `gdev`. >>> The rest of initialization. Go to ERR ZONE 2 on errors. >>> Chip registration success and exit. >>> ERR ZONE 2. gpio_device_put() and exit. >>> ERR ZONE 1.
In the Linux kernel, the following vulnerability has been resolved: gpio: Fix resource leaks on errors in gpiochip_add_data_with_key() Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"), `gdev->dev.release` is unset. As a result, the reference count to `gdev->dev` isn't dropped on the error handling paths. Drop the reference on errors. Also reorder the instructions to make the error handling simpler. Now gpiochip_add_data_with_key() roughly looks like: >>> Some memory allocation. Go to ERR ZONE 1 on errors. >>> device_initialize(). gpiodev_release() takes over the responsibility for freeing the resources of `gdev->dev`. The subsequent error handling paths shouldn't go through ERR ZONE 1 again which leads to double free. >>> Some initialization mainly on `gdev`. >>> The rest of initialization. Go to ERR ZONE 2 on errors. >>> Chip registration success and exit. >>> ERR ZONE 2. gpio_device_put() and exit. >>> ERR ZONE 1.
In the Linux kernel, the following vulnerability has been resolved: g ...