Description

In the Linux kernel, the following vulnerability has been resolved: drm/gma500: Fix null dereference in hdmi teardown pci_set_drvdata sets the value of pdev->driver_data to NULL, after which the driver_data obtained from the same dev is dereferenced in oaktrail_hdmi_i2c_exit, and the i2c_dev is extracted from it. To prevent this, swap these calls. Found by Linux Verification Center (linuxtesting.org) with Svacer.

References 8

• git.kernel.org https://git.kernel.org/stable/c/02e4ff4941efb9bbb40d8d5b61efa1a4119b1ba7
• git.kernel.org https://git.kernel.org/stable/c/0fc650fa475b50c1da8236c5e900b9460c7027bc
• git.kernel.org https://git.kernel.org/stable/c/352e66900cde63f3dadb142364d3c35170bbaaff
• git.kernel.org https://git.kernel.org/stable/c/4bbfd1b290857b9d14ea9d91562bde55ff2bc85e
• git.kernel.org https://git.kernel.org/stable/c/6ffa6b5bc861a3ea9dfcdc007f002b4a347c24ba
• git.kernel.org https://git.kernel.org/stable/c/70b0c11483d3b90b2d0f416026e475e084a77e62
• git.kernel.org https://git.kernel.org/stable/c/e15de80737d444ed743b1c60ced4a3a97913169b
• git.kernel.org https://git.kernel.org/stable/c/f800f7054d2cf28b51296c7c575da27c29e3859b

Remediation