Description

In the Linux kernel, the following vulnerability has been resolved: mmc: alcor: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path. So fix this by checking the return value and calling mmc_free_host() in the error path.

References 6

• git.kernel.org https://git.kernel.org/stable/c/289c964fe182ce755044a6cd57698072e12ffa6f
• git.kernel.org https://git.kernel.org/stable/c/29c5b4da41f35108136d843c7432885c78cf8272
• git.kernel.org https://git.kernel.org/stable/c/48dc06333d75f41c2ce9ba954bc3231324b45914
• git.kernel.org https://git.kernel.org/stable/c/4a6e5d0222804a3eaf2ea4cf893f412e7cf98cb2
• git.kernel.org https://git.kernel.org/stable/c/60fafcf2fb7ee9a4125dc9a86eeb9d490acf23e2
• git.kernel.org https://git.kernel.org/stable/c/e93d1468f429475a753d6baa79b853b7ee5ef8c0

Remediation