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Posted to commits@nuttx.apache.org by xi...@apache.org on 2022/09/15 18:59:45 UTC
[incubator-nuttx] branch master updated: net: Fix memcpy() size used by SIOCSIFHWADDR for radios
This is an automated email from the ASF dual-hosted git repository.
xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
The following commit(s) were added to refs/heads/master by this push:
new 6c4bd5c5ef net: Fix memcpy() size used by SIOCSIFHWADDR for radios
6c4bd5c5ef is described below
commit 6c4bd5c5efea168a63ddb150cee1d0755a19c980
Author: Nathan Hartman <59...@users.noreply.github.com>
AuthorDate: Thu Sep 15 10:57:51 2022 -0400
net: Fix memcpy() size used by SIOCSIFHWADDR for radios
* net/netdev/netdev_ioctl.c:
(netdev_ifr_ioctl): The ioctl SIOCSIFHWADDR sets the hardware address
(e.g., Ethernet MAC, etc.) of a network interface. Radio devices may
have different lengths of hardware addresses, such as
NET_6LOWPAN_EADDRSIZE (8), NET_6LOWPAN_SADDRSIZE (2), or
RADIO_MAX_ADDRLEN (8). Also, Kconfig CONFIG_PKTRADIO_ADDRLEN allows
the user to set any arbitrary size. Note that while the sister ioctl
SIOCGIFHWADDR "get hardware address" copies
`dev->d_mac.radio.nv_addrlen` bytes, SIOCSIFHWADDR was copying
NET_6LOWPAN_ADDRSIZE bytes unconditionally. Depending on which radio
is used, this could be incorrect. Fixing it to use
`dev->d_mac.radio.nv_addrlen` for SIOCSIFHWADDR as well. Also adding
DEBUGASSERT to ensure this is within bounds of source and
destination of the copy.
---
net/netdev/netdev_ioctl.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/net/netdev/netdev_ioctl.c b/net/netdev/netdev_ioctl.c
index ed9ecf6645..a6facbe41f 100644
--- a/net/netdev/netdev_ioctl.c
+++ b/net/netdev/netdev_ioctl.c
@@ -950,8 +950,14 @@ static int netdev_ifr_ioctl(FAR struct socket *psock, int cmd,
if (ret >= 0)
{
dev->d_mac.radio.nv_addrlen = properties.sp_addrlen;
+
+ DEBUGASSERT(dev->d_mac.radio.nv_addrlen <=
+ sizeof(dev->d_mac.radio.nv_addr));
+ DEBUGASSERT(dev->d_mac.radio.nv_addrlen <=
+ sizeof(req->ifr_hwaddr.sa_data));
+
memcpy(dev->d_mac.radio.nv_addr,
- req->ifr_hwaddr.sa_data, NET_6LOWPAN_ADDRSIZE);
+ req->ifr_hwaddr.sa_data, dev->d_mac.radio.nv_addrlen);
}
}
else