Check umove() return code

* bjm.c (sys_query_module): Print input parameters when entering
syscall.  Fix handling of syscall error.  Handle unlikely umove()
failures.
* ipc.c (tprint_msgrcv): New function.  Move part of msgrcv parser code
here, add check umove() return code.
(sys_msgsnd): Print msqid parameter as int instead of long.
(sys_msgrcv): Likewise.  Use tprint_msgrcv().
* process.c (print_affinitylist): Check umove() return code.
* sock.c (sock_ioctl): Handle unlikely umove() failure in the
SIOCGIFCONF parser.

1 files changed, 6 insertions, 2 deletions

diff --git a/sock.c b/sock.c
index 670f72b..e7c72b5 100644
--- a/sock.c
+++ b/sock.c
@@ -258,8 +258,12 @@ sock_ioctl(struct tcb *tcp, long code, long arg)
 			int i;
 			unsigned nifra = ifc.ifc_len / sizeof(struct ifreq);
 			struct ifreq ifra[nifra];
-			umoven(tcp, (unsigned long) ifc.ifc_buf, sizeof(ifra),
-			       (char *) ifra);
+
+			if (umoven(tcp, (unsigned long) ifc.ifc_buf,
+				sizeof(ifra), (char *) ifra) < 0) {
+				tprintf("%lx}", (unsigned long) ifc.ifc_buf);
+				return 1;
+			}
 			tprintf("{");
 			for (i = 0; i < nifra; ++i ) {
 				if (i > 0)