xnu-792.10.96.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 f532b52300c03c059d82bedc3aed1e141a77afac..7600f56ecd2edc74eb3e6b29933cba703b90294a 100644 (file)
--- a/osfmk/ipc/mach_msg.c
+++ b/osfmk/ipc/mach_msg.c
@@ -582,6 +582,7 @@ 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;
@@ -1488,7 +1489,6 @@ 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;
 
@@ -1581,7 +1581,6 @@ mach_msg_overwrite_trap(
 
            {
                register ipc_port_t     reply_port;
-               mach_port_seqno_t       local_seqno;
                spl_t s;
 
                /*
@@ -1658,7 +1657,7 @@ 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);
 
@@ -1670,7 +1669,7 @@ 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 */
@@ -1755,6 +1754,7 @@ 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) {