Early Initialization of Struct nfsd4_copy to Prevent Refcount Underflow

CVE-2024-50241

What is CVE-2024-50241?

In the Linux kernel, the following vulnerability has been resolved:

NFSD: Initialize struct nfsd4_copy earlier

Ensure the refcount and async_copies fields are initialized early. cleanup_async_copy() will reference these fields if an error occurs in nfsd4_copy(). If they are not correctly initialized, at the very least, a refcount underflow occurs.

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References