Description

In the Linux kernel, the following vulnerability has been resolved: spi: s3c64xx: fix NULL-deref on driver unbind A change moving DMA channel allocation from probe() back to s3c64xx_spi_prepare_transfer() failed to remove the corresponding deallocation from remove(). Drop the bogus DMA channel release from remove() to avoid triggering a NULL-pointer dereference on driver unbind. This issue was flagged by Sashiko when reviewing a controller deregistration fix.

References 6

• git.kernel.org https://git.kernel.org/stable/c/1108b8722b9ff0cdd3e8aa18d98244fcd93b6760
• git.kernel.org https://git.kernel.org/stable/c/1b66f16a571a10ba8889ac471755c8af9c5b9266
• git.kernel.org https://git.kernel.org/stable/c/22788b1a8611380b141e09a8896702e32d164238
• git.kernel.org https://git.kernel.org/stable/c/29e219a18e21258bdb4ee12cecd0e9ec87d7e6a7
• git.kernel.org https://git.kernel.org/stable/c/323a258f4b1916b5a3098618e036e033b2f2317f
• git.kernel.org https://git.kernel.org/stable/c/45daacbead8a009844bd5dba6cfa731332184d17

Remediation