Description

In the Linux kernel, the following vulnerability has been resolved: mmc: meson-gx: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del(). Fix this by checking the return value and goto error path which will call mmc_free_host().

References 7

• git.kernel.org https://git.kernel.org/stable/c/42343e3c6195e934b9cb4c08b7ff84a3778d77f9
• git.kernel.org https://git.kernel.org/stable/c/64b2c441171febf075bd9632aca579afda8ab9fb
• git.kernel.org https://git.kernel.org/stable/c/90935f16f2650ab7416fa2ffbe5c28cb39cf3f1e
• git.kernel.org https://git.kernel.org/stable/c/9e11c6bb745be4e9b325cf96031b4ea34801342d
• git.kernel.org https://git.kernel.org/stable/c/e0cfe7aa41f3965f5224affd88afd48c60f6ad1f
• git.kernel.org https://git.kernel.org/stable/c/f5506e0bbb25102bd8ef2e1a3b483a0b934e454e
• git.kernel.org https://git.kernel.org/stable/c/f5ce76aeddf01ca8f2a80fc37119388d59db7c10

Remediation