Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_hda_read_acpi() The acpi_get_first_physical_node() function can return NULL, in which case the get_device() function also returns NULL, but this value is then dereferenced without checking,so add a check to prevent a crash. Found by Linux Verification Center (linuxtesting.org) with SVACE.

References 6

• git.kernel.org https://git.kernel.org/stable/c/343fa9800cf9870ec681e21f0a6f2157b74ae520
• git.kernel.org https://git.kernel.org/stable/c/7a35a505d76a4b6cd426b59ff2d800d0394cc5d3
• git.kernel.org https://git.kernel.org/stable/c/c28946b7409b7b68fb0481ec738c8b04578b11c6
• git.kernel.org https://git.kernel.org/stable/c/c34b04cc6178f33c08331568c7fd25c5b9a39f66
• git.kernel.org https://git.kernel.org/stable/c/e63f9c81ca28b06eeeac3630faddc50717897351
• git.kernel.org https://git.kernel.org/stable/c/e6ba921b17797ccc545d80e0dbccb5fab91c248c

Remediation