1728319 - Assertion failure: (isUsingFlexGrow && availableFreeSpace >= 0) || (!isUsingFlexGrow && availableFreeSpace <= 0) (availableFreeSpace's sign should match isUsingFlexGrow), at /layout/generic/nsFlexContainerFrame.cpp:3071

Status: VERIFIED FIXED

(Core :: Layout: Flexbox, defect)

Description

[Jason Kratzer [:jkratzer]]

Testcase found while fuzzing mozilla-central rev b5acac258824 (built with: --enable-debug --enable-fuzzing).

Testcase can be reproduced using the following commands:

$ pip install fuzzfetch grizzly-framework
$ python -m fuzzfetch --build b5acac258824 --debug --fuzzing -n firefox
$ python -m grizzly.replay ./firefox/firefox testcase.html

Assertion failure: (isUsingFlexGrow && availableFreeSpace >= 0) || (!isUsingFlexGrow && availableFreeSpace <= 0) (availableFreeSpace's sign should match isUsingFlexGrow), at /layout/generic/nsFlexContainerFrame.cpp:3071

    ==3028890==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f6885e6cf50 bp 0x7ffe26b0ed40 sp 0x7ffe26b0ecb0 T3028890)
    ==3028890==The signal is caused by a WRITE memory access.
    ==3028890==Hint: address points to the zero page.
        #0 0x7f6885e6cf50 in nsFlexContainerFrame::FlexLine::ResolveFlexibleLengths(int, ComputedFlexLineInfo*) /layout/generic/nsFlexContainerFrame.cpp:3069:5
        #1 0x7f6885e72da5 in nsFlexContainerFrame::DoFlexLayout(mozilla::ReflowInput const&, int&, int&, int&, nsTArray<nsFlexContainerFrame::FlexLine>&, nsTArray<nsFlexContainerFrame::StrutInfo>&, nsTArray<nsIFrame*>&, nsFlexContainerFrame::FlexboxAxisTracker const&, int, int, int, bool, ComputedFlexContainerInfo*) /layout/generic/nsFlexContainerFrame.cpp:5074:10
        #2 0x7f6885e711fe in nsFlexContainerFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /layout/generic/nsFlexContainerFrame.cpp:4534:5
        #3 0x7f6885e4e7c0 in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /layout/generic/nsContainerFrame.cpp:1000:14
        #4 0x7f6885e4dbca in nsCanvasFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /layout/generic/nsCanvasFrame.cpp:787:7
        #5 0x7f6885e4e7c0 in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /layout/generic/nsContainerFrame.cpp:1000:14
        #6 0x7f6885e9a565 in nsHTMLScrollFrame::ReflowScrolledFrame(mozilla::ScrollReflowInput*, bool, bool, mozilla::ReflowOutput*) /layout/generic/nsGfxScrollFrame.cpp:759:3
        #7 0x7f6885e9b029 in nsHTMLScrollFrame::ReflowContents(mozilla::ScrollReflowInput*, mozilla::ReflowOutput const&) /layout/generic/nsGfxScrollFrame.cpp:880:3
        #8 0x7f6885e9f4c9 in nsHTMLScrollFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /layout/generic/nsGfxScrollFrame.cpp:1299:3
        #9 0x7f6885e1f418 in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, int, int, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /layout/generic/nsContainerFrame.cpp:1040:14
        #10 0x7f6885e1ecbc in mozilla::ViewportFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /layout/generic/ViewportFrame.cpp:374:7
        #11 0x7f6885d2211b in mozilla::PresShell::DoReflow(nsIFrame*, bool, mozilla::OverflowChangedTracker*) /layout/base/PresShell.cpp:9597:11
        #12 0x7f6885d2c2ee in mozilla::PresShell::ProcessReflowCommands(bool) /layout/base/PresShell.cpp:9768:24
        #13 0x7f6885d2b7a9 in mozilla::PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush) /layout/base/PresShell.cpp:4256:11
        #14 0x7f6885cf26df in FlushPendingNotifications /builds/worker/workspace/obj-build/dist/include/mozilla/PresShell.h:1423:5
        #15 0x7f6885cf26df in nsRefreshDriver::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsRefreshDriver::IsExtraTick) /layout/base/nsRefreshDriver.cpp:2357:20
        #16 0x7f6885cfa7fa in TickDriver /layout/base/nsRefreshDriver.cpp:348:13
        #17 0x7f6885cfa7fa in mozilla::RefreshDriverTimer::TickRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&) /layout/base/nsRefreshDriver.cpp:326:7
        #18 0x7f6885cfa713 in mozilla::RefreshDriverTimer::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) /layout/base/nsRefreshDriver.cpp:342:5
        #19 0x7f6885cfa5e0 in mozilla::VsyncRefreshDriverTimer::RunRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) /layout/base/nsRefreshDriver.cpp:771:5
        #20 0x7f6885cf9c7a in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) /layout/base/nsRefreshDriver.cpp:700:16
        #21 0x7f6885cf9595 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyParentProcessVsync() /layout/base/nsRefreshDriver.cpp:617:7
        #22 0x7f6885cf9019 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync(mozilla::VsyncEvent const&) /layout/base/nsRefreshDriver.cpp:538:9
        #23 0x7f68854c42e6 in mozilla::dom::VsyncChild::RecvNotify(mozilla::VsyncEvent const&, float const&) /dom/ipc/VsyncChild.cpp:68:15
        #24 0x7f68820e6064 in mozilla::dom::PVsyncChild::OnMessageReceived(IPC::Message const&) /builds/worker/workspace/obj-build/ipc/ipdl/PVsyncChild.cpp:178:54
        #25 0x7f6881eba8ac in mozilla::ipc::PBackgroundChild::OnMessageReceived(IPC::Message const&) /builds/worker/workspace/obj-build/ipc/ipdl/PBackgroundChild.cpp:6091:32
        #26 0x7f6881b3986f in mozilla::ipc::MessageChannel::DispatchAsyncMessage(mozilla::ipc::ActorLifecycleProxy*, IPC::Message const&) /ipc/glue/MessageChannel.cpp:2053:25
        #27 0x7f6881b36381 in mozilla::ipc::MessageChannel::DispatchMessage(IPC::Message&&) /ipc/glue/MessageChannel.cpp:1978:9
        #28 0x7f6881b37805 in mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::MessageChannel::MessageTask&) /ipc/glue/MessageChannel.cpp:1826:3
        #29 0x7f6881b3839b in mozilla::ipc::MessageChannel::MessageTask::Run() /ipc/glue/MessageChannel.cpp:1857:13
        #30 0x7f68810fe53e in mozilla::RunnableTask::Run() /xpcom/threads/TaskController.cpp:502:16
        #31 0x7f68810da59f in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /xpcom/threads/TaskController.cpp:805:26
        #32 0x7f68810d9208 in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /xpcom/threads/TaskController.cpp:641:15
        #33 0x7f68810d9483 in mozilla::TaskController::ProcessPendingMTTask(bool) /xpcom/threads/TaskController.cpp:425:36
        #34 0x7f6881101b36 in operator() /xpcom/threads/TaskController.cpp:135:37
        #35 0x7f6881101b36 in mozilla::detail::RunnableFunction<mozilla::TaskController::InitializeInternal()::$_0>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:532:5
        #36 0x7f68810ecf3f in nsThread::ProcessNextEvent(bool, bool*) /xpcom/threads/nsThread.cpp:1148:16
        #37 0x7f68810f3d3a in NS_ProcessNextEvent(nsIThread*, bool) /xpcom/threads/nsThreadUtils.cpp:466:10
        #38 0x7f6881b3f6d6 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) /ipc/glue/MessagePump.cpp:85:21
        #39 0x7f6881a5fdc7 in MessageLoop::RunInternal() /ipc/chromium/src/base/message_loop.cc:331:10
        #40 0x7f6881a5fcd2 in RunHandler /ipc/chromium/src/base/message_loop.cc:324:3
        #41 0x7f6881a5fcd2 in MessageLoop::Run() /ipc/chromium/src/base/message_loop.cc:306:3
        #42 0x7f68859fca78 in nsBaseAppShell::Run() /widget/nsBaseAppShell.cpp:137:27
        #43 0x7f688787bf93 in XRE_RunAppShell() /toolkit/xre/nsEmbedFunctions.cpp:917:20
        #44 0x7f6881b405ca in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) /ipc/glue/MessagePump.cpp:235:9
        #45 0x7f6881a5fdc7 in MessageLoop::RunInternal() /ipc/chromium/src/base/message_loop.cc:331:10
        #46 0x7f6881a5fcd2 in RunHandler /ipc/chromium/src/base/message_loop.cc:324:3
        #47 0x7f6881a5fcd2 in MessageLoop::Run() /ipc/chromium/src/base/message_loop.cc:306:3
        #48 0x7f688787b5ce in XRE_InitChildProcess(int, char**, XREChildData const*) /toolkit/xre/nsEmbedFunctions.cpp:749:34
        #49 0x55614bd7eab6 in content_process_main /browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
        #50 0x55614bd7eab6 in main /browser/app/nsBrowserApp.cpp:327:18
        #51 0x7f6897a040b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
        #52 0x55614bd5b8bc in _start (/home/jkratzer/builds/mc-debug/firefox-bin+0x158bc)
    
    UndefinedBehaviorSanitizer can not provide additional info.
    SUMMARY: UndefinedBehaviorSanitizer: SEGV /layout/generic/nsFlexContainerFrame.cpp:3069:5 in nsFlexContainerFrame::FlexLine::ResolveFlexibleLengths(int, ComputedFlexLineInfo*)
    ==3028890==ABORTING

Comment 1

[Jason Kratzer [:jkratzer]]

Attachment: Testcase

Comment 2

[Bugmon [:jkratzer for issues]]

Bugmon Analysis
Verified bug as reproducible on mozilla-central 20210831152836-86d5ab060da8.
The bug appears to have been introduced in the following build range:

Start: 4e0dafb873bd3b45c0cecf4a8e64f7e324211f7c (20210825095400)
End: 9a8bac0b93fdeb3e66fc1ab5814854b4cc377697 (20210825092302)
Pushlog: https://hg.mozilla.org/mozilla-unified/pushloghtml?fromchange=4e0dafb873bd3b45c0cecf4a8e64f7e324211f7c&tochange=9a8bac0b93fdeb3e66fc1ab5814854b4cc377697

Comment 3

[Mats Palmgren (inactive)]

In that range, it seems bug 1469649 is the culprit.

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1469649

Comment 5

[Ting-Yu Lin [:TYLin] (UTC-8)]

Attachment: Bug 1728319 - Tweak an assertion to recognize integer overflow due to huge margin/border/padding. r?dholbert

Promote FlexLine::mTotalItemMBP to AuCoord64 can fix the testcase in
this patch, but layout/generic/crashtests/1488762-1.html will start
crashing. It is because FlexItem::OuterMainSize() can return negative
size due to integer overflow, and the negative sizes will accumulate in
mTotalOuterHypotheticalMainSize.

Instead of promoting more variables to AuCoord64 to workaround huge
margin/border/padding that we cannot handle gracefully, this patch tweak
the assertion to test only if mTotalOuterHypotheticalMainSize and
mTotalItemMBP have valid values.

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/737edd21c6e2
Tweak an assertion to recognize integer overflow due to huge margin/border/padding. r=dholbert

Comment 7

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/737edd21c6e2

Comment 8

[Bugmon [:jkratzer for issues]]

Bugmon Analysis
Verified bug as fixed on rev mozilla-central 20210904094024-8d40319470d4.
Removing bugmon keyword as no further action possible. Please review the bug and re-add the keyword for further analysis.