From: danborkmann@iogearbox.net Date: Tue, 27 Mar 2012 22:47:43 +0000 (+0000) Subject: rose_dev: fix memcpy-bug in rose_set_mac_address X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=81213b5e8ae68e204aa7a3f83c4f9100405dbff9;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git rose_dev: fix memcpy-bug in rose_set_mac_address If both addresses equal, nothing needs to be done. If the device is down, then we simply copy the new address to dev->dev_addr. If the device is up, then we add another loopback device with the new address, and if that does not fail, we remove the loopback device with the old address. And only then, we update the dev->dev_addr. Signed-off-by: Daniel Borkmann Signed-off-by: David S. Miller --- diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c index 178ff4f73c85..2679507ad333 100644 --- a/net/rose/rose_dev.c +++ b/net/rose/rose_dev.c @@ -96,11 +96,11 @@ static int rose_set_mac_address(struct net_device *dev, void *addr) struct sockaddr *sa = addr; int err; - if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len)) + if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len)) return 0; if (dev->flags & IFF_UP) { - err = rose_add_loopback_node((rose_address *)dev->dev_addr); + err = rose_add_loopback_node((rose_address *)sa->sa_data); if (err) return err;