CVE-2024-57927 Information

Description

In the Linux kernel the following vulnerability has been resolved:

nfs: Fix oops in nfs_netfs_init_request() when copying to cache

When netfslib wants to copy some data that has just been read on behalf of nfs it creates a new write request and calls nfs_netfs_init_request() to initialise it but with a NULL file pointer. This causes nfs_file_open_context() to oops - however we don’t actually need the nfs context as we’re only going to write to the cache.

Fix this by just returning if we aren’t given a file pointer and emit a warning if the request was for something other than copy-to-cache.

Further fix nfs_netfs_free_request() so that it doesn’t try to free the context if the pointer is NULL.

Reference

https://git.kernel.org/stable/c/13a07cc81e2d116cece727a83746c74b87a9d417 https://git.kernel.org/stable/c/86ad1a58f6a9453f49e06ef957a40a8dac00a13f