Merge branch 'fix-implicit-sign-conversions-in-handshake-upcall'

Chuck Lever says:

====================
Fix implicit sign conversions in handshake upcall

An internal static analysis tool noticed some implicit sign
conversions for some of the arguments in the handshake upcall
protocol.
====================

Link: https://lore.kernel.org/r/169530154802.8905.2645661840284268222.stgit@oracle-102.nfsv4bat.org
Signed-off-by: Jakub Kicinski <[email protected]>

5 files changed, 14 insertions, 14 deletions

diff --git a/Documentation/netlink/specs/handshake.yaml b/Documentation/netlink/specs/handshake.yaml
index 6d89e30f5fd5..b934cc513e3d 100644
--- a/Documentation/netlink/specs/handshake.yaml
+++ b/Documentation/netlink/specs/handshake.yaml
@@ -34,16 +34,16 @@ attribute-sets:
     attributes:
       -
         name: cert
-        type: u32
+        type: s32
       -
         name: privkey
-        type: u32
+        type: s32
   -
     name: accept
     attributes:
       -
         name: sockfd
-        type: u32
+        type: s32
       -
         name: handler-class
         type: u32
@@ -79,7 +79,7 @@ attribute-sets:
         type: u32
       -
         name: sockfd
-        type: u32
+        type: s32
       -
         name: remote-auth
         type: u32
diff --git a/net/handshake/genl.c b/net/handshake/genl.c
index 233be5cbfec9..f55d14d7b726 100644
--- a/net/handshake/genl.c
+++ b/net/handshake/genl.c
@@ -18,7 +18,7 @@ static const struct nla_policy handshake_accept_nl_policy[HANDSHAKE_A_ACCEPT_HAN
 /* HANDSHAKE_CMD_DONE - do */
 static const struct nla_policy handshake_done_nl_policy[HANDSHAKE_A_DONE_REMOTE_AUTH + 1] = {
 	[HANDSHAKE_A_DONE_STATUS] = { .type = NLA_U32, },
-	[HANDSHAKE_A_DONE_SOCKFD] = { .type = NLA_U32, },
+	[HANDSHAKE_A_DONE_SOCKFD] = { .type = NLA_S32, },
 	[HANDSHAKE_A_DONE_REMOTE_AUTH] = { .type = NLA_U32, },
 };
 
diff --git a/net/handshake/netlink.c b/net/handshake/netlink.c
index d0bc1dd8e65a..64a0046dd611 100644
--- a/net/handshake/netlink.c
+++ b/net/handshake/netlink.c
@@ -163,7 +163,7 @@ int handshake_nl_done_doit(struct sk_buff *skb, struct genl_info *info)
 
 	if (GENL_REQ_ATTR_CHECK(info, HANDSHAKE_A_DONE_SOCKFD))
 		return -EINVAL;
-	fd = nla_get_u32(info->attrs[HANDSHAKE_A_DONE_SOCKFD]);
+	fd = nla_get_s32(info->attrs[HANDSHAKE_A_DONE_SOCKFD]);
 
 	sock = sockfd_lookup(fd, &err);
 	if (!sock)
diff --git a/net/handshake/tlshd.c b/net/handshake/tlshd.c
index bbfb4095ddd6..d697f68c598c 100644
--- a/net/handshake/tlshd.c
+++ b/net/handshake/tlshd.c
@@ -173,9 +173,9 @@ static int tls_handshake_put_certificate(struct sk_buff *msg,
 	if (!entry_attr)
 		return -EMSGSIZE;
 
-	if (nla_put_u32(msg, HANDSHAKE_A_X509_CERT,
+	if (nla_put_s32(msg, HANDSHAKE_A_X509_CERT,
 			treq->th_certificate) ||
-	    nla_put_u32(msg, HANDSHAKE_A_X509_PRIVKEY,
+	    nla_put_s32(msg, HANDSHAKE_A_X509_PRIVKEY,
 			treq->th_privkey)) {
 		nla_nest_cancel(msg, entry_attr);
 		return -EMSGSIZE;
@@ -214,7 +214,7 @@ static int tls_handshake_accept(struct handshake_req *req,
 		goto out_cancel;
 
 	ret = -EMSGSIZE;
-	ret = nla_put_u32(msg, HANDSHAKE_A_ACCEPT_SOCKFD, fd);
+	ret = nla_put_s32(msg, HANDSHAKE_A_ACCEPT_SOCKFD, fd);
 	if (ret < 0)
 		goto out_cancel;
 	ret = nla_put_u32(msg, HANDSHAKE_A_ACCEPT_MESSAGE_TYPE, treq->th_type);
diff --git a/tools/net/ynl/generated/handshake-user.h b/tools/net/ynl/generated/handshake-user.h
index 47646bb91cea..2b34acc608de 100644
--- a/tools/net/ynl/generated/handshake-user.h
+++ b/tools/net/ynl/generated/handshake-user.h
@@ -28,8 +28,8 @@ struct handshake_x509 {
 		__u32 privkey:1;
 	} _present;
 
-	__u32 cert;
-	__u32 privkey;
+	__s32 cert;
+	__s32 privkey;
 };
 
 /* ============== HANDSHAKE_CMD_ACCEPT ============== */
@@ -65,7 +65,7 @@ struct handshake_accept_rsp {
 		__u32 peername_len;
 	} _present;
 
-	__u32 sockfd;
+	__s32 sockfd;
 	enum handshake_msg_type message_type;
 	__u32 timeout;
 	enum handshake_auth auth_mode;
@@ -104,7 +104,7 @@ struct handshake_done_req {
 	} _present;
 
 	__u32 status;
-	__u32 sockfd;
+	__s32 sockfd;
 	unsigned int n_remote_auth;
 	__u32 *remote_auth;
 };
@@ -122,7 +122,7 @@ handshake_done_req_set_status(struct handshake_done_req *req, __u32 status)
 	req->status = status;
 }
 static inline void
-handshake_done_req_set_sockfd(struct handshake_done_req *req, __u32 sockfd)
+handshake_done_req_set_sockfd(struct handshake_done_req *req, __s32 sockfd)
 {
 	req->_present.sockfd = 1;
 	req->sockfd = sockfd;