Description: isdn/i4l: fix buffer overflow
References:
 https://patchwork.kernel.org/patch/9880041/
Notes:
 carnil> we disabled building the module a long time back in 2.6.32
 carnil> with:
 carnil> debian/config: Disable ISDN_I4L and related options.
 carnil> we still might apply the patch for the benefit of people
 carnil> building customized kernel from the debian source.
 bwh> ISDN4Linux is full of bugs like this, so we shouldn't waste time
 bwh> fixing the few that get reported.
Bugs:
upstream: released (4.13-rc4) [9f5af546e6acc30f075828cb58c7f09665033967]
4.9-upstream-stable: released (4.9.41) [7b3a66739ff01fcd9b8007a18ddd29edd2cb74f7]
3.16-upstream-stable: ignored "Driver is unfixable"
3.2-upstream-stable: ignored "Driver is unfixable"
sid: released (4.13.4-1)
4.9-stretch-security: ignored  "Driver is unfixable"
3.16-jessie-security: ignored "Driver is unfixable"
3.2-wheezy-security: ignored "Driver is unfixable"