CVE-2022-49103

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

NFSv4.2: fix reference count leaks in _nfs42_proc_copy_notify()

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The reference counting issue happens in two error paths in the function _nfs42_proc_copy_notify(). In both error paths, the function simply returns the error code and forgets to balance the refcount of object ctx, bumped by get_nfs_open_context() earlier, which may cause refcount leaks.

Fix it by balancing refcount of the ctx object before the function returns in both error paths.

Affected Software

References

• https://git.kernel.org/stable/c/9b9feec97c1fc7dd9bb69f62c4905cddf1801599
• https://git.kernel.org/stable/c/b37f482ba9f0e6382c188e3fccf6c4b2fdc938eb
• https://git.kernel.org/stable/c/b7f114edd54326f730a754547e7cfb197b5bc132
• https://git.kernel.org/stable/c/f46f632f9cfae4b2e3635fa58840a8ec584c42e3
• https://git.kernel.org/stable/c/fb73bf6305f4eb8f0cf9a61ee874d55f019d6dc4