linux-user: fd_trans_*_data() returns the length

fd_trans_target_to_host_data() and fd_trans_host_to_target_data() must
return the length of processed data.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

1 files changed, 32 insertions, 4 deletions

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 8bf6205dc2..59defff01f 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -2826,12 +2826,26 @@ static TargetFdTrans target_packet_trans = {
 #ifdef CONFIG_RTNETLINK
 static abi_long netlink_route_target_to_host(void *buf, size_t len)
 {
-    return target_to_host_nlmsg_route(buf, len);
+    abi_long ret;
+
+    ret = target_to_host_nlmsg_route(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
 }
 
 static abi_long netlink_route_host_to_target(void *buf, size_t len)
 {
-    return host_to_target_nlmsg_route(buf, len);
+    abi_long ret;
+
+    ret = host_to_target_nlmsg_route(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
 }
 
 static TargetFdTrans target_netlink_route_trans = {
@@ -2842,12 +2856,26 @@ static TargetFdTrans target_netlink_route_trans = {
 
 static abi_long netlink_audit_target_to_host(void *buf, size_t len)
 {
-    return target_to_host_nlmsg_audit(buf, len);
+    abi_long ret;
+
+    ret = target_to_host_nlmsg_audit(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
 }
 
 static abi_long netlink_audit_host_to_target(void *buf, size_t len)
 {
-    return host_to_target_nlmsg_audit(buf, len);
+    abi_long ret;
+
+    ret = host_to_target_nlmsg_audit(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
 }
 
 static TargetFdTrans target_netlink_audit_trans = {