sctp: fix some type cast warnings introduced by stream reconf

These warnings were found by running 'make C=2 M=net/sctp/'.

They are introduced by not aware of Endian when coding stream
reconf patches.

Since commit c0d8bab6ae51 ("sctp: add get and set sockopt for
reconf_enable") enabled stream reconf feature for users, the
Fixes tag below would use it.

Fixes: c0d8bab6ae51 ("sctp: add get and set sockopt for reconf_enable")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 39 insertions, 30 deletions

diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index 82b171e1aa0b..09d7412e9cb0 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -716,28 +716,28 @@ struct sctp_reconf_chunk {
 
 struct sctp_strreset_outreq {
         struct sctp_paramhdr param_hdr;
-        __u32 request_seq;
-        __u32 response_seq;
-        __u32 send_reset_at_tsn;
-        __u16 list_of_streams[0];
+        __be32 request_seq;
+        __be32 response_seq;
+        __be32 send_reset_at_tsn;
+        __be16 list_of_streams[0];
 };
 
 struct sctp_strreset_inreq {
         struct sctp_paramhdr param_hdr;
-        __u32 request_seq;
-        __u16 list_of_streams[0];
+        __be32 request_seq;
+        __be16 list_of_streams[0];
 };
 
 struct sctp_strreset_tsnreq {
         struct sctp_paramhdr param_hdr;
-        __u32 request_seq;
+        __be32 request_seq;
 };
 
 struct sctp_strreset_addstrm {
         struct sctp_paramhdr param_hdr;
-        __u32 request_seq;
-        __u16 number_of_streams;
-        __u16 reserved;
+        __be32 request_seq;
+        __be16 number_of_streams;
+        __be16 reserved;
 };
 
 enum {
@@ -752,16 +752,16 @@ enum {
 
 struct sctp_strreset_resp {
         struct sctp_paramhdr param_hdr;
-        __u32 response_seq;
-        __u32 result;
+        __be32 response_seq;
+        __be32 result;
 };
 
 struct sctp_strreset_resptsn {
         struct sctp_paramhdr param_hdr;
-        __u32 response_seq;
-        __u32 result;
-        __u32 senders_next_tsn;
-        __u32 receivers_next_tsn;
+        __be32 response_seq;
+        __be32 result;
+        __be32 senders_next_tsn;
+        __be32 receivers_next_tsn;
 };
 
 #endif /* __LINUX_SCTP_H__ */
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index 2db3d3a9ce1d..88233cf8b8d4 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -261,7 +261,7 @@ struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc,
                                     struct sctp_fwdtsn_skip *skiplist);
 struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc);
 struct sctp_chunk *sctp_make_strreset_req(const struct sctp_association *asoc,
-                                          __u16 stream_num, __u16 *stream_list,
+                                          __u16 stream_num, __be16 *stream_list,
                                           bool out, bool in);
 struct sctp_chunk *sctp_make_strreset_tsnreq(
                                         const struct sctp_association *asoc);
diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h
index b8c86ec1a8f5..231dc42f1da6 100644
--- a/include/net/sctp/ulpevent.h
+++ b/include/net/sctp/ulpevent.h
@@ -130,7 +130,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
 
 struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
         const struct sctp_association *asoc, __u16 flags,
-        __u16 stream_num, __u16 *stream_list, gfp_t gfp);
+        __u16 stream_num, __be16 *stream_list, gfp_t gfp);
 
 struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event(
         const struct sctp_association *asoc, __u16 flags,
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index ca8f196b6c6c..57c55045f5a7 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -3591,7 +3591,7 @@ static struct sctp_chunk *sctp_make_reconf(const struct sctp_association *asoc,
  */
 struct sctp_chunk *sctp_make_strreset_req(
                                         const struct sctp_association *asoc,
-                                        __u16 stream_num, __u16 *stream_list,
+                                        __u16 stream_num, __be16 *stream_list,
                                         bool out, bool in)
 {
         struct sctp_strreset_outreq outreq;
@@ -3788,7 +3788,8 @@ bool sctp_verify_reconf(const struct sctp_association *asoc,
 {
         struct sctp_reconf_chunk *hdr;
         union sctp_params param;
-        __u16 last = 0, cnt = 0;
+        __be16 last = 0;
+        __u16 cnt = 0;
 
         hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr;
         sctp_walk_params(param, hdr, params) {
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index 63ea15503714..fa8371ff05c4 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -118,6 +118,7 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
         __u16 i, str_nums, *str_list;
         struct sctp_chunk *chunk;
         int retval = -EINVAL;
+        __be16 *nstr_list;
         bool out, in;
 
         if (!asoc->peer.reconf_capable ||
@@ -148,13 +149,18 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
                         if (str_list[i] >= stream->incnt)
                                 goto out;
 
+        nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL);
+        if (!nstr_list) {
+                retval = -ENOMEM;
+                goto out;
+        }
+
         for (i = 0; i < str_nums; i++)
-                str_list[i] = htons(str_list[i]);
+                nstr_list[i] = htons(str_list[i]);
 
-        chunk = sctp_make_strreset_req(asoc, str_nums, str_list, out, in);
+        chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in);
 
-        for (i = 0; i < str_nums; i++)
-                str_list[i] = ntohs(str_list[i]);
+        kfree(nstr_list);
 
         if (!chunk) {
                 retval = -ENOMEM;
@@ -305,7 +311,7 @@ out:
 }
 
 static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param(
-                        struct sctp_association *asoc, __u32 resp_seq,
+                        struct sctp_association *asoc, __be32 resp_seq,
                         __be16 type)
 {
         struct sctp_chunk *chunk = asoc->strreset_chunk;
@@ -345,8 +351,9 @@ struct sctp_chunk *sctp_process_strreset_outreq(
 {
         struct sctp_strreset_outreq *outreq = param.v;
         struct sctp_stream *stream = &asoc->stream;
-        __u16 i, nums, flags = 0, *str_p = NULL;
         __u32 result = SCTP_STRRESET_DENIED;
+        __u16 i, nums, flags = 0;
+        __be16 *str_p = NULL;
         __u32 request_seq;
 
         request_seq = ntohl(outreq->request_seq);
@@ -439,8 +446,9 @@ struct sctp_chunk *sctp_process_strreset_inreq(
         struct sctp_stream *stream = &asoc->stream;
         __u32 result = SCTP_STRRESET_DENIED;
         struct sctp_chunk *chunk = NULL;
-        __u16 i, nums, *str_p;
         __u32 request_seq;
+        __u16 i, nums;
+        __be16 *str_p;
 
         request_seq = ntohl(inreq->request_seq);
         if (TSN_lt(asoc->strreset_inseq, request_seq) ||
@@ -769,7 +777,7 @@ struct sctp_chunk *sctp_process_strreset_resp(
 
         if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) {
                 struct sctp_strreset_outreq *outreq;
-                __u16 *str_p;
+                __be16 *str_p;
 
                 outreq = (struct sctp_strreset_outreq *)req;
                 str_p = outreq->list_of_streams;
@@ -794,7 +802,7 @@ struct sctp_chunk *sctp_process_strreset_resp(
                         nums, str_p, GFP_ATOMIC);
         } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) {
                 struct sctp_strreset_inreq *inreq;
-                __u16 *str_p;
+                __be16 *str_p;
 
                 /* if the result is performed, it's impossible for inreq */
                 if (result == SCTP_STRRESET_PERFORMED)
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 67abc0194f30..5447228bf1a0 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -847,7 +847,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
 
 struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
         const struct sctp_association *asoc, __u16 flags, __u16 stream_num,
-        __u16 *stream_list, gfp_t gfp)
+        __be16 *stream_list, gfp_t gfp)
 {
         struct sctp_stream_reset_event *sreset;
         struct sctp_ulpevent *event;