Re: [PATCH] nfsd: zero NFSv4 COMPOUND tag padding

[Chuck Lever]

On Tue, 15 Sep 2026 13:00:49 -0300, Aldo Ariel Panzardo wrote:
> nfs4svc_encode_compoundres() copies the tag bytes into reserved XDR space
> and skips directly to the aligned end of the field. xdr_reserve_space()
> rounds the reservation up but does not initialize the padding bytes.
> 
> A remote client can choose a tag length that is not a multiple of four,
> causing one to three stale bytes from the response page to be returned in
> the COMPOUND reply.
> 
> [...]

Applied to nfsd-testing, thanks!

[1/1] nfsd: zero NFSv4 COMPOUND tag padding
      commit: 28c0a5693a60625fb794943f2755c4bc5643f7c4

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Chuck Lever