From c23243fccd4f73430ca06a862acd33c020c8ed17 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@netris.org>
Date: Sat, 6 Jan 2018 13:40:23 -0500
Subject: [PATCH] gnu: icecat: Add more fixes, including Spectre mitigation.

* gnu/packages/gnuzilla.scm (icecat)[source]: Add more fixes from the
upstream mozilla-esr52 repository, plus a backported mitigation for
Spectre from Firefox 57.0.4.
* gnu/packages/patches/icecat-bug-1427870-spectre-mitigation.patch:
New file.
* gnu/local.mk (dist_patch_DATA): Add it.
---
 gnu/local.mk                                  |  1 +
 gnu/packages/gnuzilla.scm                     |  6 ++-
 ...cecat-bug-1427870-spectre-mitigation.patch | 49 +++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/icecat-bug-1427870-spectre-mitigation.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 679c119a5f..d82cbcee26 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -757,6 +757,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/icecat-bug-1415133.patch			\
   %D%/packages/patches/icecat-bug-1414945.patch			\
   %D%/packages/patches/icecat-bug-1424373-pt2.patch		\
+  %D%/packages/patches/icecat-bug-1427870-spectre-mitigation.patch	\
   %D%/packages/patches/icu4c-CVE-2017-7867-CVE-2017-7868.patch	\
   %D%/packages/patches/icu4c-CVE-2017-14952.patch		\
   %D%/packages/patches/icu4c-reset-keyword-list-iterator.patch	\
diff --git a/gnu/packages/gnuzilla.scm b/gnu/packages/gnuzilla.scm
index a31e93d499..92037326e0 100644
--- a/gnu/packages/gnuzilla.scm
+++ b/gnu/packages/gnuzilla.scm
@@ -510,7 +510,11 @@ security standards.")
         (mozilla-patch "icecat-bug-1412145.patch"        "66cfc3c4047d" "05j8ic4lv2d2ygr6d62rkdlfyg2rpljalwrkkhllinw2dfi3n15b")
         (mozilla-patch "icecat-bug-1399400.patch"        "3236ffdf0ced" "1kvk4qyslaj1ldgs1wpxnf79zajcihzcd1zvbrg990i3hgyn3gk3")
         (mozilla-patch "icecat-bug-1424373-pt1.patch"    "320032aaa068" "1ch282qibprz1q0f2imvynh4sg7gads6sf3ayhjcd62zjncpgyz7")
-        (search-patch  "icecat-bug-1424373-pt2.patch")))
+        (search-patch  "icecat-bug-1424373-pt2.patch")
+        (mozilla-patch "icecat-bug-1412420.patch"        "c2945f1249eb" "18p0344w6grpyfiz8dczfw977p0qy37iqv95whgnrjli2ab51kji")
+        (mozilla-patch "icecat-bug-1395508-pt1.patch"    "263165eacc54" "0518xnd9f4qkn7l0z73kldm9dr33y6hf054ril4f8r2j8s9fy33i")
+        (mozilla-patch "icecat-bug-1395508-pt2.patch"    "58e87d9cc44e" "0j9qwjm25bmhw0sj426yl4fqaa6zknf5cjk0yisdd3895652n5i4")
+        (search-patch  "icecat-bug-1427870-spectre-mitigation.patch")))
       (modules '((guix build utils)))
       (snippet
        '(begin
diff --git a/gnu/packages/patches/icecat-bug-1427870-spectre-mitigation.patch b/gnu/packages/patches/icecat-bug-1427870-spectre-mitigation.patch
new file mode 100644
index 0000000000..6b088286cb
--- /dev/null
+++ b/gnu/packages/patches/icecat-bug-1427870-spectre-mitigation.patch
@@ -0,0 +1,49 @@
+Mitigate Spectre by reducing the resolution of performance.now() to 20
+microseconds.  Based on:
+
+  https://hg.mozilla.org/releases/mozilla-release/rev/afa87f9be3a8
+
+For more details, see:
+
+  https://blog.mozilla.org/security/2018/01/03/mitigations-landing-new-class-timing-attack/
+
+This patch was modified to apply cleanly to GNU IceCat.
+
+
+# HG changeset patch
+# User Tom Ritter <tom@mozilla.com>
+# Date 1514660820 21600
+# Node ID afa87f9be3a8852da3a30f286b15ae599c7874f6
+# Parent  6caa457ebedc915b43dc1d054b8fe22e82ca7447
+Bug 1427870 - Change resolution of .now() to 20us. r=bkelly, a=lizzard
+
+The comment about workers was introduced in Bug 1186489 but became obsolete some time after that
+(definitely by Bug 1278838)
+
+diff --git a/dom/performance/Performance.cpp b/dom/performance/Performance.cpp
+--- a/dom/performance/Performance.cpp
++++ b/dom/performance/Performance.cpp
+@@ -234,20 +234,19 @@ Performance::ClearResourceTimings()
+ {
+   MOZ_ASSERT(NS_IsMainThread());
+   mResourceEntries.Clear();
+ }
+ 
+ DOMHighResTimeStamp
+ Performance::RoundTime(double aTime) const
+ {
+-  // Round down to the nearest 5us, because if the timer is too accurate people
+-  // can do nasty timing attacks with it.  See similar code in the worker
+-  // Performance implementation.
+-  const double maxResolutionMs = 0.005;
++  // Round down to the nearest 20us, because if the timer is too accurate people
++  // can do nasty timing attacks with it.
++  const double maxResolutionMs = 0.020;
+   return floor(aTime / maxResolutionMs) * maxResolutionMs;
+ }
+ 
+ 
+ void
+ Performance::Mark(const nsAString& aName, ErrorResult& aRv)
+ {
+   // Don't add the entry if the buffer is full. XXX should be removed by bug 1159003.