Re: patch-2.7.3 no longer applies relative symbolic link patches

[Josh Boyer <jwboyer@fedoraproject.org>]

[Adding Junio's correct email address.  Sigh.]

On Mon, Jan 26, 2015 at 11:29 AM, Josh Boyer <jwboyer@fedoraproject.org> wrote:
> Hi,
>
> I went to do the Fedora 3.19-rc6 build this morning and it failed in
> our buildsystem with:
>
> + '[' '!' -f /builddir/build/SOURCES/patch-3.19-rc6.xz ']'
> + case "$patch" in
> + unxz
> + patch -p1 -F1 -s
> symbolic link target '../../../../../include/dt-bindings' is invalid
> error: Bad exit status from /var/tmp/rpm-tmp.mWE3ZL (%prep)
>
> That is coming from the hunk in patch-3.19-rc6.xz that creates the
> symbolic link from arch/arm64/boot/dts/include/dt-bindings to
> include/dt-bindings.  Oddly enough, patch-3.19-rc5.xz contains the
> same hunk and it built fine last week.
>
> Digging in, it seems that upstream patch has decided that relative
> symlinks are forbidden now as part of a fix for CVE-2015-1196.  You
> can find the relevant bugs here:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1185928
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775901#13
>
> Aside from locally modifying patch-3.19-rc6.xz, I'm not sure what else
> to do.  I thought I would send a heads up since anyone that is using
> patch-2.7.3 is probably going to run into this issue.
>
> josh