vduse: fix memory corruption in vduse_dev_ioctl()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: vduse: fix memory corruption in vduse_dev_ioctl() The "config.offset" comes from the user. There needs to a check to prevent it being out of bounds. The "config.offset" and "dev->config_size" variables are both type u32. So if the offset if out of bounds then the "dev->config_size - config.offset" subtraction results in a very high u32 value. The out of bounds offset can result in memory corruption.

References

• https://git.kernel.org/stable/c/e6c67560b4341914bec32ec536e931c22062af65
• https://git.kernel.org/stable/c/ff9f9c6e74848170fcb45c8403c80d661484c8c9