raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-08 19:09:57 +00:00
Code Issues Projects Releases Wiki Activity

rtnetlink: allocate more memory for dev_set_mac_address()

Browse Source 
[ Upstream commit 153711f942 ]

virtnet_set_mac_address() interprets mac address as struct
sockaddr, but upper layer only allocates dev->addr_len
which is ETH_ALEN + sizeof(sa_family_t) in this case.

We lack a unified definition for mac address, so just fix
the upper layer, this also allows drivers to interpret it
to struct sockaddr freely.

Reported-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
WANG Cong
2017-07-20 11:27:57 -07:00
committed by Greg Kroah-Hartman
parent 0c47f11bc4
commit cda2bc91ba
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
net/core/rtnetlink.c
View File

@@ -1965,7 +1965,8 @@ static int do_setlink(const struct sk_buff *skb,
struct sockaddr *sa;
int len;
len = sizeof(sa_family_t) + dev->addr_len;
len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
sizeof(*sa));
sa = kmalloc(len, GFP_KERNEL);
if (!sa) {
err = -ENOMEM;