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| author |   Levin, Alexander <alexander.levin@verizon.com> | 2017-07-18 04:23:16 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-07-19 13:32:11 -0700 |
| commit | 98de4e0ea47d106846fc0e30ce4e644283fa7fc2 (patch) | |
| tree | ba5cff38d9d85c2d9e003c238707a4050dd8b683 /net | |
| parent | netfilter: fix netfilter_net_init() return (diff) | |
| download | linux-dev-98de4e0ea47d106846fc0e30ce4e644283fa7fc2.tar.xz linux-dev-98de4e0ea47d106846fc0e30ce4e644283fa7fc2.zip | |
wireless: wext: terminate ifr name coming from userspace
ifr name is assumed to be a valid string by the kernel, but nothing
was forcing username to pass a valid string.
In turn, this would cause panics as we tried to access the string
past it's valid memory.
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/dev_ioctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index 82fd4c9c4a1b..7657ad6bc13d 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -424,6 +424,8 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) if (copy_from_user(&iwr, arg, sizeof(iwr))) return -EFAULT; + iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0; + return wext_handle_ioctl(net, &iwr, cmd, arg); } |