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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>
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@ -424,6 +424,8 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
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if (copy_from_user(&iwr, arg, sizeof(iwr)))
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return -EFAULT;
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iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0;
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return wext_handle_ioctl(net, &iwr, cmd, arg);
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}
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