Module: xenomai-3
Branch: stable-3.0.x
Commit: 78f32e29d96d8d8a32eab880e590942ddbabe81c
URL:
http://git.xenomai.org/?p=xenomai-3.git;a=commit;h=78f32e29d96d8d8a32eab880e590942ddbabe81c
Author: Philippe Gerum <r...@xenomai.org>
Date: Tue Dec 5 10:36:07 2017 +0100
net/packet: recvmsg: write back namelen only if name required
---
kernel/drivers/net/stack/packet/af_packet.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/kernel/drivers/net/stack/packet/af_packet.c
b/kernel/drivers/net/stack/packet/af_packet.c
index c25d6aa..d3198ab 100644
--- a/kernel/drivers/net/stack/packet/af_packet.c
+++ b/kernel/drivers/net/stack/packet/af_packet.c
@@ -351,12 +351,6 @@ rt_packet_recvmsg(struct rtdm_fd *fd, struct user_msghdr
*u_msg, int msg_flags)
rtskb = rtskb_dequeue_chain(&sock->incoming);
RTNET_ASSERT(rtskb != NULL, return -EFAULT;);
- /* copy the address */
- namelen = sizeof(sll);
- ret = rtnet_put_arg(fd, &msg->msg_namelen, &namelen, sizeof(namelen));
- if (ret)
- goto fail;
-
/* copy the address if required. */
if (msg->msg_name) {
struct rtnet_device *rtdev = rtskb->rtdev;
@@ -373,6 +367,11 @@ rt_packet_recvmsg(struct rtdm_fd *fd, struct user_msghdr
*u_msg, int msg_flags)
ret = rtnet_put_arg(fd, msg->msg_name, &sll, sizeof(sll));
if (ret)
goto fail;
+
+ namelen = sizeof(sll);
+ ret = rtnet_put_arg(fd, &u_msg->msg_namelen, &namelen, sizeof(namelen));
+ if (ret)
+ goto fail;
}
/* Include the header in raw delivery */
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