svcrpc: fix failures to handle -1 uid's
As of f025adf191924e3a75ce80e130afcd2485b53bb8 "sunrpc: Properly decode
kuids and kgids in RPC_AUTH_UNIX credentials" any rpc containing a -1
(0xffff) uid or gid would fail with a badcred error.
Commit afe3c3fd5392b2f0066930abc5dbd3f4b14a0f13 "svcrpc: fix failures to
handle -1 uid's and gid's" fixed part of the problem, but overlooked the
gid upcall--the kernel can request supplementary gid's for the -1 uid,
but mountd's attempt write a response will get -EINVAL.
Symptoms were nfsd failing to reply to the first attempt to use a newly
negotiated krb5 context.
Reported-by: Sven Geggus <lists@fuchsschwanzdomain.de>
Tested-by: Sven Geggus <lists@fuchsschwanzdomain.de>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index a98853d..621ca7b 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -493,8 +493,6 @@
if (rv)
return -EINVAL;
uid = make_kuid(&init_user_ns, id);
- if (!uid_valid(uid))
- return -EINVAL;
ug.uid = uid;
expiry = get_expiry(&mesg);