5.10-stable review patch. If anyone has any objections, please let me know.
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From: Chuck Lever chuck.lever@oracle.com
[ Upstream commit ea5021e911d3479346a75ac9b7d9dcd751b0fb99 ]
The xdr_stream conversion inadvertently left some code that set the page_len of the send buffer. The XDR stream encoders should handle this automatically now.
This oversight adds garbage past the end of the Reply message. Clients typically ignore the garbage, but NFSD does not need to send it, as it leaks stale memory contents onto the wire.
Fixes: f8cba47344f7 ("NFSD: Update the NFSv2 GETACL result encoder to use struct xdr_stream") Reviewed-by: Jeff Layton jlayton@kernel.org Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfsd/nfs2acl.c | 10 ---------- 1 file changed, 10 deletions(-)
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c index f8179fc8c9bdf..9adf672dedbdd 100644 --- a/fs/nfsd/nfs2acl.c +++ b/fs/nfsd/nfs2acl.c @@ -244,7 +244,6 @@ nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) struct nfsd3_getaclres *resp = rqstp->rq_resp; struct dentry *dentry = resp->fh.fh_dentry; struct inode *inode; - int w;
if (!svcxdr_encode_stat(xdr, resp->status)) return false; @@ -258,15 +257,6 @@ nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) if (xdr_stream_encode_u32(xdr, resp->mask) < 0) return false;
- rqstp->rq_res.page_len = w = nfsacl_size( - (resp->mask & NFS_ACL) ? resp->acl_access : NULL, - (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); - while (w > 0) { - if (!*(rqstp->rq_next_page++)) - return true; - w -= PAGE_SIZE; - } - if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access, resp->mask & NFS_ACL, 0)) return false;