[arch-commits] Commit in qt5-webengine/trunk (PKGBUILD qtwebengine-glibc-2.29.patch)

Antonio Rojas arojas at archlinux.org
Sun May 5 21:04:05 UTC 2019


    Date: Sunday, May 5, 2019 @ 21:04:03
  Author: arojas
Revision: 352555

Fix PPAPI plugins with glibc 2.29

Added:
  qt5-webengine/trunk/qtwebengine-glibc-2.29.patch
Modified:
  qt5-webengine/trunk/PKGBUILD

------------------------------+
 PKGBUILD                     |   10 ++-
 qtwebengine-glibc-2.29.patch |  105 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 112 insertions(+), 3 deletions(-)

Modified: PKGBUILD
===================================================================
--- PKGBUILD	2019-05-05 21:04:03 UTC (rev 352554)
+++ PKGBUILD	2019-05-05 21:04:03 UTC (rev 352555)
@@ -4,7 +4,7 @@
 pkgname=qt5-webengine
 _qtver=5.12.3
 pkgver=${_qtver/-/}
-pkgrel=1
+pkgrel=2
 arch=('x86_64')
 url='https://www.qt.io'
 license=('LGPL3' 'LGPL2.1' 'BSD')
@@ -15,9 +15,10 @@
 groups=('qt' 'qt5')
 _pkgfqn="${pkgname/5-/}-everywhere-src-${_qtver}"
 source=("https://download.qt.io/official_releases/qt/${pkgver%.*}/${_qtver}/submodules/${_pkgfqn}.tar.xz"
-         qtwebengine-harmony.patch)
+         qtwebengine-harmony.patch qtwebengine-glibc-2.29.patch)
 sha256sums=('3ff3bac12d75aa0f3fd993bb7077fe411f7b0e6a3993af6f8b039d48e3dc4317'
-            'feca54ab09ac0fc9d0626770a6b899a6ac5a12173c7d0c1005bc3964ec83e7b3')
+            'feca54ab09ac0fc9d0626770a6b899a6ac5a12173c7d0c1005bc3964ec83e7b3'
+            'dd791f154b48e69cd47fd94753c45448655b529590995fd71ac1591c53a3d60c')
 
 prepare() {
   mkdir -p build
@@ -30,6 +31,9 @@
 
   # FreeType 2.8.1
   patch -Np1 -i ../qtwebengine-harmony.patch
+
+  cd src/3rdparty/chromium
+  patch -p1 -i "$srcdir"/qtwebengine-glibc-2.29.patch # Fix PPAPI plugins with glibc 2.29
 }
 
 build() {

Added: qtwebengine-glibc-2.29.patch
===================================================================
--- qtwebengine-glibc-2.29.patch	                        (rev 0)
+++ qtwebengine-glibc-2.29.patch	2019-05-05 21:04:03 UTC (rev 352555)
@@ -0,0 +1,105 @@
+From 65046b8f90d0336cbe5f2f15cc7da5cb798360ad Mon Sep 17 00:00:00 2001
+From: Matthew Denton <mpdenton at chromium.org>
+Date: Wed, 24 Apr 2019 15:44:40 +0000
+Subject: [PATCH] Update Linux Seccomp syscall restrictions to EPERM
+ posix_spawn/vfork
+
+Glibc's system() function switched to using posix_spawn, which uses
+CLONE_VFORK. Pepperflash includes a sandbox debugging check which
+relies on us EPERM-ing process creation like this, rather than crashing
+the process with SIGSYS.
+
+So whitelist clone() calls, like posix_spawn, that include the flags
+CLONE_VFORK and CLONE_VM.
+
+Bug: 949312
+Change-Id: I3f4b90114b2fc1d9929e3c0a85bbe8f10def3c20
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1568086
+Commit-Queue: Robert Sesek <rsesek at chromium.org>
+Reviewed-by: Robert Sesek <rsesek at chromium.org>
+Cr-Commit-Position: refs/heads/master@{#653590}
+---
+ .../baseline_policy_unittest.cc               | 29 +++++++++++++++++++
+ .../syscall_parameters_restrictions.cc        | 13 +++++++--
+ 2 files changed, 40 insertions(+), 2 deletions(-)
+
+diff --git a/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc b/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
+index cdeb210ccb..40fcebf933 100644
+--- a/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
++++ b/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
+@@ -10,7 +10,9 @@
+ #include <sched.h>
+ #include <signal.h>
+ #include <stddef.h>
++#include <stdlib.h>
+ #include <string.h>
++#include <sys/mman.h>
+ #include <sys/prctl.h>
+ #include <sys/resource.h>
+ #include <sys/socket.h>
+@@ -130,6 +132,33 @@ BPF_TEST_C(BaselinePolicy, ForkArmEperm, BaselinePolicy) {
+   BPF_ASSERT_EQ(EPERM, fork_errno);
+ }
+ 
++BPF_TEST_C(BaselinePolicy, SystemEperm, BaselinePolicy) {
++  errno = 0;
++  int ret_val = system("echo SHOULD NEVER RUN");
++  BPF_ASSERT_EQ(-1, ret_val);
++  BPF_ASSERT_EQ(EPERM, errno);
++}
++
++BPF_TEST_C(BaselinePolicy, CloneVforkEperm, BaselinePolicy) {
++  errno = 0;
++  // Allocate a couple pages for the child's stack even though the child should
++  // never start.
++  constexpr size_t kStackSize = 4096 * 4;
++  void* child_stack = mmap(nullptr, kStackSize, PROT_READ | PROT_WRITE,
++                           MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
++  BPF_ASSERT_NE(child_stack, nullptr);
++  pid_t pid = syscall(__NR_clone, CLONE_VM | CLONE_VFORK | SIGCHLD,
++                      static_cast<char*>(child_stack) + kStackSize, nullptr,
++                      nullptr, nullptr);
++  const int clone_errno = errno;
++  TestUtils::HandlePostForkReturn(pid);
++
++  munmap(child_stack, kStackSize);
++
++  BPF_ASSERT_EQ(-1, pid);
++  BPF_ASSERT_EQ(EPERM, clone_errno);
++}
++
+ BPF_TEST_C(BaselinePolicy, CreateThread, BaselinePolicy) {
+   base::Thread thread("sandbox_tests");
+   BPF_ASSERT(thread.Start());
+diff --git a/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc b/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
+index 100afe50e3..348ab6e8c5 100644
+--- a/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
++++ b/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
+@@ -135,7 +135,8 @@ namespace sandbox {
+ #if !defined(OS_NACL_NONSFI)
+ // Allow Glibc's and Android pthread creation flags, crash on any other
+ // thread creation attempts and EPERM attempts to use neither
+-// CLONE_VM, nor CLONE_THREAD, which includes all fork() implementations.
++// CLONE_VM nor CLONE_THREAD (all fork implementations), unless CLONE_VFORK is
++// present (as in newer versions of posix_spawn).
+ ResultExpr RestrictCloneToThreadsAndEPERMFork() {
+   const Arg<unsigned long> flags(0);
+ 
+@@ -154,8 +155,16 @@ ResultExpr RestrictCloneToThreadsAndEPERMFork() {
+       AnyOf(flags == kAndroidCloneMask, flags == kObsoleteAndroidCloneMask,
+             flags == kGlibcPthreadFlags);
+ 
++  // The following two flags are the two important flags in any vfork-emulating
++  // clone call. EPERM any clone call that contains both of them.
++  const uint64_t kImportantCloneVforkFlags = CLONE_VFORK | CLONE_VM;
++
++  const BoolExpr is_fork_or_clone_vfork =
++      AnyOf((flags & (CLONE_VM | CLONE_THREAD)) == 0,
++            (flags & kImportantCloneVforkFlags) == kImportantCloneVforkFlags);
++
+   return If(IsAndroid() ? android_test : glibc_test, Allow())
+-      .ElseIf((flags & (CLONE_VM | CLONE_THREAD)) == 0, Error(EPERM))
++      .ElseIf(is_fork_or_clone_vfork, Error(EPERM))
+       .Else(CrashSIGSYSClone());
+ }
+ 


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