Description

In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource() As 'kdata.num' is user-controlled data, if user tries to allocate memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it creates a stack trace and messes up dmesg with a warning. Call trace: -> privcmd_ioctl --> privcmd_ioctl_mmap_resource Add __GFP_NOWARN in order to avoid too large allocation warning. This is detected by static analysis using smatch.

References 7

• git.kernel.org https://git.kernel.org/stable/c/0bf874183b32eae2cc20e3c5be38ec3d33e7e564
• git.kernel.org https://git.kernel.org/stable/c/46026bb057c35f5bb111bf95e00cd8366d2e34d4
• git.kernel.org https://git.kernel.org/stable/c/4da411086f5ab32f811a89ef804980ec106ebb65
• git.kernel.org https://git.kernel.org/stable/c/4f983ee5e5de924d93a7bbb4e6f68f38c6256cd5
• git.kernel.org https://git.kernel.org/stable/c/5d68ae32d132ea2af73bc223fd64c46f85302a8b
• git.kernel.org https://git.kernel.org/stable/c/8b997b2bb2c53b76a6db6c195930e9ab8e4b0c79
• git.kernel.org https://git.kernel.org/stable/c/e0c5f1058ed96f2b7487560c4c4cbd768d13d065

Remediation