[socket-nif] Initiation of "current reader" missing for recvmsg

When calling the recvmsg function when there is no data,
we should be wait (for the specified amount of time).
But this not not wotk because the "current reader" structure
was not initiated.

OTP-14831

1 files changed, 4 insertions, 0 deletions

diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c
index 5d2cfbc10b..2eddcb5658 100644
--- a/erts/emulator/nifs/common/socket_nif.c
+++ b/erts/emulator/nifs/common/socket_nif.c
@@ -12334,9 +12334,13 @@ ERL_NIF_TERM recvmsg_check_result(ErlNifEnv*        env,
 
         } else if ((saveErrno == ERRNO_BLOCK) ||
                    (saveErrno == EAGAIN)) {
+            char* xres;
 
             SSDBG( descP, ("SOCKET", "recvmsg_check_result -> eagain\r\n") );
             
+            if ((xres = recv_init_current_reader(env, descP, recvRef)) != NULL)
+                return esock_make_error_str(env, xres);
+            
             SELECT(env, descP->sock, (ERL_NIF_SELECT_READ),
                    descP, NULL, recvRef);