Add patch: Allow restricted clock_nanosleep in Linux sandbox
References: - https://bugreports.qt.io/browse/QTBUG-81313 - https://codereview.qt-project.org/c/qt/qtwebengine-chromium/+/292352 - https://bugzilla.redhat.com/show_bug.cgi?id=1812482 - https://bugzilla.redhat.com/show_bug.cgi?id=1773289
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Ankur Sinha (Ankur Sinha Gmail)
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52761a3da1
@ -44,7 +44,7 @@
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Summary: Qt5 - QtWebEngine components
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Name: qt5-qtwebengine
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Version: 5.13.2
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Release: 3%{?dist}
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Release: 4%{?dist}
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# See LICENSE.GPL LICENSE.LGPL LGPL_EXCEPTION.txt, for details
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# See also http://qt-project.org/doc/qt-5.0/qtdoc/licensing.html
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@ -92,6 +92,13 @@ Patch25: qtwebengine-everywhere-5.13.2-missing-semicolon-in-blink.patch
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Patch26: qtwebengine-everywhere-5.13.2-use-python2.patch
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# Fix missing include in chromium
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Patch27: qtwebengine-everywhere-5.13.2-fix-chromium-headers.patch
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# Fix for clock_nanosleep
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# https://bugreports.qt.io/browse/QTBUG-81313
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# https://codereview.qt-project.org/c/qt/qtwebengine-chromium/+/292352
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# Qt: https://codereview.qt-project.org/gitweb?p=qt/qtwebengine-chromium.git;a=patch;h=2c37da9ad4fe7d5b1911ba991798e508c81ba5ef
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# Chromium: https://chromium.googlesource.com/chromium/src/+/54407b422a9cbf775a68c1d57603c0ecac8ce0d7%5E%21/#F0
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# Didn't apply cleanly, manually ported
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Patch28: qtwebengine-everywhere-5.13.2-allow-restricted-clock_nanosleep-in-Linux-sandbox-manual.patch
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## Upstream patches:
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# qtwebengine-chromium
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@ -380,6 +387,8 @@ popd
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%patch26 -p1 -b .use-python2
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%patch27 -p1 -b .fix-chromium
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%patch28 -p0 -b .allow-clock_nanosleep
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# the xkbcommon config/feature was renamed in 5.12, so need to adjust QT_CONFIG references
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# when building on older Qt releases
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%if "%{_qt5_version}" < "5.12.0"
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@ -597,6 +606,9 @@ done
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%changelog
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* Wed Mar 25 2020 Ankur Sinha <ankursinha AT fedoraproject DOT org> - 5.13.2-4
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- Add patch to allow clock_nanosleep in Linux sandbox (Chromium)
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* Fri Feb 21 2020 Troy Dawson <tdawson@redhat.com> - 5.13.2-3
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- Patch 3rd party chromium, fix FTBFS (#1799084)
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@ -0,0 +1,129 @@
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diff -ur ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc
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--- ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc 2020-03-25 12:57:05.214021490 +0000
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+++ ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc 2020-03-25 12:58:35.813396054 +0000
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@@ -137,7 +137,7 @@
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return Allow();
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#endif
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- if (sysno == __NR_clock_gettime) {
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+ if (sysno == __NR_clock_gettime || sysno == __NR_clock_nanosleep) {
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return RestrictClockID();
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}
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diff -ur ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc
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--- ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc 2020-03-25 12:57:05.214021490 +0000
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+++ ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/baseline_policy_unittest.cc 2020-03-25 13:01:05.971702078 +0000
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@@ -393,6 +393,18 @@
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syscall(SYS_clock_gettime, CLOCK_MONOTONIC_RAW, &ts);
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}
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+BPF_DEATH_TEST_C(BaselinePolicy,
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+ ClockNanosleepWithDisallowedClockCrashes,
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+ DEATH_SEGV_MESSAGE(GetErrorMessageContentForTests()),
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+ BaselinePolicy) {
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+ struct timespec ts;
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+ struct timespec out_ts;
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+ ts.tv_sec = 0;
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+ ts.tv_nsec = 0;
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+ syscall(SYS_clock_nanosleep, (~0) | CLOCKFD, 0, &ts, &out_ts);
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+}
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+
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+
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#if !defined(GRND_RANDOM)
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#define GRND_RANDOM 2
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#endif
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diff -ur ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h
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--- ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h 2020-03-25 12:57:05.213021508 +0000
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+++ ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h 2020-03-25 13:03:32.058081155 +0000
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@@ -86,12 +86,13 @@
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// process).
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SANDBOX_EXPORT bpf_dsl::ResultExpr RestrictGetrusage();
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-// Restrict |clk_id| for clock_getres(), clock_gettime() and clock_settime().
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-// We allow accessing only CLOCK_MONOTONIC, CLOCK_PROCESS_CPUTIME_ID,
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-// CLOCK_REALTIME, and CLOCK_THREAD_CPUTIME_ID. In particular, this disallows
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-// access to arbitrary per-{process,thread} CPU-time clock IDs (such as those
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-// returned by {clock,pthread}_getcpuclockid), which can leak information
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-// about the state of the host OS.
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+// Restrict |clk_id| for clock_getres(), clock_gettime(), clock_settime(), and
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+// clock_nanosleep(). We allow accessing only CLOCK_BOOTTIME,
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+// CLOCK_MONOTONIC{,_RAW,_COARSE}, CLOCK_PROCESS_CPUTIME_ID,
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+// CLOCK_REALTIME{,_COARSE}, and CLOCK_THREAD_CPUTIME_ID. In particular, on
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+// non-Android platforms this disallows access to arbitrary per-{process,thread}
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+// CPU-time clock IDs (such as those returned by {clock,pthread}_getcpuclockid),
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+// which can leak information about the state of the host OS.
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SANDBOX_EXPORT bpf_dsl::ResultExpr RestrictClockID();
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// Restrict the flags argument to getrandom() to allow only no flags, or
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diff -ur ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc
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--- ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc 2020-03-25 12:57:05.213021508 +0000
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+++ ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc 2020-03-25 13:06:05.643325692 +0000
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@@ -59,6 +59,7 @@
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switch (sysno) {
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case __NR_clock_gettime:
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case __NR_clock_getres:
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+ case __NR_clock_nanosleep:
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return RestrictClockID();
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default:
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return Allow();
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@@ -99,6 +100,25 @@
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#endif
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}
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+void CheckClockNanosleep(clockid_t clockid) {
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+ struct timespec ts;
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+ struct timespec out_ts;
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+ ts.tv_sec = 0;
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+ ts.tv_nsec = 0;
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+ clock_nanosleep(clockid, 0, &ts, &out_ts);
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+}
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+
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+BPF_TEST_C(ParameterRestrictions,
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+ clock_nanosleep_allowed,
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+ RestrictClockIdPolicy) {
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+ CheckClockNanosleep(CLOCK_MONOTONIC);
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+ CheckClockNanosleep(CLOCK_MONOTONIC_COARSE);
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+ CheckClockNanosleep(CLOCK_MONOTONIC_RAW);
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+ CheckClockNanosleep(CLOCK_BOOTTIME);
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+ CheckClockNanosleep(CLOCK_REALTIME);
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+ CheckClockNanosleep(CLOCK_REALTIME_COARSE);
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+}
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+
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BPF_DEATH_TEST_C(ParameterRestrictions,
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clock_gettime_crash_monotonic_raw,
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DEATH_SEGV_MESSAGE(sandbox::GetErrorMessageContentForTests()),
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@@ -107,6 +127,17 @@
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syscall(SYS_clock_gettime, CLOCK_MONOTONIC_RAW, &ts);
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}
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+BPF_DEATH_TEST_C(ParameterRestrictions,
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+ clock_nanosleep_crash_clock_fd,
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+ DEATH_SEGV_MESSAGE(sandbox::GetErrorMessageContentForTests()),
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+ RestrictClockIdPolicy) {
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+ struct timespec ts;
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+ struct timespec out_ts;
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+ ts.tv_sec = 0;
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+ ts.tv_nsec = 0;
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+ syscall(SYS_clock_nanosleep, (~0) | CLOCKFD, 0, &ts, &out_ts);
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+}
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+
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#if !defined(OS_ANDROID)
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BPF_DEATH_TEST_C(ParameterRestrictions,
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clock_gettime_crash_cpu_clock,
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diff -ur ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
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--- ../qtwebengine-everywhere-src-5.13.2.orig/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc 2020-03-25 12:57:05.213021508 +0000
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+++ ./src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc 2020-03-25 13:06:50.881514077 +0000
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@@ -35,9 +35,10 @@
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return true;
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case __NR_adjtimex: // Privileged.
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case __NR_clock_adjtime: // Privileged.
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- case __NR_clock_getres: // Could be allowed.
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- case __NR_clock_gettime:
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- case __NR_clock_nanosleep: // Could be allowed.
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+ case __NR_clock_getres: // Allowed only on Android with parameters
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+ // filtered by RestrictClokID().
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+ case __NR_clock_gettime: // Parameters filtered by RestrictClockID().
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+ case __NR_clock_nanosleep: // Parameters filtered by RestrictClockID().
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case __NR_clock_settime: // Privileged.
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#if defined(__i386__) || \
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(defined(ARCH_CPU_MIPS_FAMILY) && defined(ARCH_CPU_32_BITS))
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