In the Linux kernel, the following vulnerability has been resolved: NFSD: Never decrement pending_async_copies on error The error flow in nfsd4_copy() calls cleanup_async_copy(), which already decrements nn->pending_async_copies.
https://git.kernel.org/stable/c/fb79d68a36e21960341ccab07d1ac06d93830321
https://git.kernel.org/stable/c/ed98d26021db0fe62c327aa9f5e57a90bff3fa94
https://git.kernel.org/stable/c/949ee5d44d1fd95119b29b3382a933cdc617bf9e
https://git.kernel.org/stable/c/9467c49437e948c541569007cd412d577942e635
https://git.kernel.org/stable/c/8286f8b622990194207df9ab852e0f87c60d35e9
https://git.kernel.org/stable/c/1421883aa30c5d26bc3370e2d19cb350f0d5ca28