summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorJeff Layton <jlayton@redhat.com>2009-12-18 16:28:20 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2010-01-18 10:19:21 -0800
commit8064af147be22c82fa805c6af0695c7dc52bb9c5 (patch)
tree7fc65561c8e793e5db8abf70f657df575909c10c /net
parent8ffe94786b66c4ea4298c5ab770de2e96993c9e3 (diff)
sunrpc: on successful gss error pipe write, don't return error
commit 486bad2e40e938cd68fd853b7a9fa3115a9d3a4a upstream. When handling the gssd downcall, the kernel should distinguish between a successful downcall that contains an error code and a failed downcall (i.e. where the parsing failed or some other sort of problem occurred). In the former case, gss_pipe_downcall should be returning the number of bytes written to the pipe instead of an error. In the event of other errors, we generally want the initiating task to retry the upcall so we set msg.errno to -EAGAIN. An unexpected error code here is a bug however, so BUG() in that case. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 129d75ea25d2..9c5a19d9dbce 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -644,7 +644,22 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
if (IS_ERR(p)) {
err = PTR_ERR(p);
- gss_msg->msg.errno = (err == -EAGAIN) ? -EAGAIN : -EACCES;
+ switch (err) {
+ case -EACCES:
+ gss_msg->msg.errno = err;
+ err = mlen;
+ break;
+ case -EFAULT:
+ case -ENOMEM:
+ case -EINVAL:
+ case -ENOSYS:
+ gss_msg->msg.errno = -EAGAIN;
+ break;
+ default:
+ printk(KERN_CRIT "%s: bad return from "
+ "gss_fill_context: %ld\n", __func__, err);
+ BUG();
+ }
goto err_release_msg;
}
gss_msg->ctx = gss_get_ctx(ctx);