linux-kernel - patch-2.7.3 no longer applies relative symbolic link patches

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Message-ID: <CA+5PVA7rVy6Li_1haj1QmGG0D6avLB5Xej=2YGt6K-11kKHR5A@mail.gmail.com>
Date:	Mon, 26 Jan 2015 11:29:07 -0500
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Junio C Hamano <junkio@....net>
Cc:	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
	twaugh@...hat.com, Git Mailing List <git@...r.kernel.org>
Subject: patch-2.7.3 no longer applies relative symbolic link patches

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
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