xnu-792.18.15.tar.gz

[apple/xnu.git] / osfmk / ipc / mach_msg.c

diff --git a/osfmk/ipc/mach_msg.c b/osfmk/ipc/mach_msg.c
index 13481685d69e802866b3abbf4a983ab9f2e6297f..516c7a15ad4ba6cb9082cc4ecf7f28fd495bd659 100644 (file)
--- a/osfmk/ipc/mach_msg.c
+++ b/osfmk/ipc/mach_msg.c
@@ -591,6 +591,7 @@ mach_msg_overwrite_trap(
        mach_port_name_t        notify = args->notify;
        mach_vm_address_t       rcv_msg_addr = args->rcv_msg;
         mach_msg_size_t                scatter_list_size = 0; /* NOT INITIALIZED - but not used in pactice */
+       mach_port_seqno_t temp_seqno = 0;
 
        register mach_msg_header_t *hdr;
        mach_msg_return_t  mr = MACH_MSG_SUCCESS;
@@ -1497,7 +1498,6 @@ mach_msg_overwrite_trap(
 
            slow_copyin:
            {
-               mach_port_seqno_t temp_seqno = 0;
                register mach_port_name_t reply_name =
                                (mach_port_name_t)hdr->msgh_local_port;
 
@@ -1590,7 +1590,6 @@ mach_msg_overwrite_trap(
 
            {
                register ipc_port_t     reply_port;
-               mach_port_seqno_t       local_seqno;
                spl_t s;
 
                /*
@@ -1667,7 +1666,7 @@ mach_msg_overwrite_trap(
                 * no threads blocked waiting to send.
                 */
                dest_port = reply_port;
-               local_seqno = rcv_mqueue->imq_seqno++;
+               temp_seqno = rcv_mqueue->imq_seqno++;
                imq_unlock(rcv_mqueue);
                splx(s);
 
@@ -1679,7 +1678,7 @@ mach_msg_overwrite_trap(
                ip_check_unlock(reply_port);
 
                if (option & MACH_RCV_TRAILER_MASK) {
-                       trailer->msgh_seqno = local_seqno;      
+                       trailer->msgh_seqno = temp_seqno;       
                        trailer->msgh_trailer_size = REQUESTED_TRAILER_SIZE(option);
                }
                /* copy out the kernel reply */
@@ -1764,6 +1763,7 @@ mach_msg_overwrite_trap(
                /* LP64support - have to compute real size as it would be received */
                reply_size = ipc_kmsg_copyout_size(kmsg, current_map()) +
                             REQUESTED_TRAILER_SIZE(option);
+               temp_seqno = trailer->msgh_seqno;
                if (rcv_size < reply_size) {
                        if (msg_receive_error(kmsg, msg_addr, option, temp_seqno,
                                        space) == MACH_RCV_INVALID_DATA) {