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sunrpc: gss_pipe_downcall(), don't assume all errors are transient
Instead of mapping all errors except EACCES to EAGAIN, map all errors except EAGAIN to EACCES. An example is user-land negotiating a Kerberos context with an encryption type that is not supported by the kernel code. (This can happen due to mis-configuration or a bug in the Kerberos code that does not honor our request to limit the encryption types negotiated.) This failure is not transient, and returning EAGAIN causes mount to continuously retry rather than giving up. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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@ -540,7 +540,7 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
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p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
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if (IS_ERR(p)) {
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err = PTR_ERR(p);
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gss_msg->msg.errno = (err == -EACCES) ? -EACCES : -EAGAIN;
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gss_msg->msg.errno = (err == -EAGAIN) ? -EAGAIN : -EACCES;
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goto err_release_msg;
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}
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gss_msg->ctx = gss_get_ctx(ctx);
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