255398 2023-04-13 09:07:31 -0700 [GTK] Crash in GraphicsContextGLGBM::allocateDrawBufferObject 2023-07-05 11:10:17 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=258831 P2 Normal --- 1 mcatanzaro cgarcia bugs-noreply mcatanzaro zan oldest_to_newest 1948507 0 465886 mcatanzaro 2023-04-13 09:07:31 -0700 Created attachment 465886 Full backtrace Here's yet another random non-reproducible SIGSEGV crash that occurred when loading some page. Note the this=0x0: #0 WebCore::GBMBufferSwapchain::Buffer::handle() const (this=0x0) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/platform/graphics/gbm/GBMBufferSwapchain.h:100 #1 WebCore::GraphicsContextGLGBM::allocateDrawBufferObject() (this=0x7fef0106c110) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/platform/graphics/gbm/GraphicsContextGLGBM.cpp:305 #2 0x00007fefc23d9260 in WebCore::HTMLCanvasElement::prepareForDisplay() (this=0x7fef21084630) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/html/HTMLCanvasElement.cpp:1059 #3 0x00007fefc21e24f9 in WebCore::Document::prepareCanvasesForDisplayIfNeeded() (this=<optimized out>) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/dom/Document.cpp:9451 #4 0x00007fefc286b4ee in WTF::Function<void (WebCore::Document&)>::operator()(WebCore::Document&) const (this=0x7fffe6061828, in=...) at WTF/Headers/wtf/Function.h:82 #5 WebCore::Page::forEachDocumentFromMainFrame(WebCore::LocalFrame const&, WTF::Function<void (WebCore::Document&)> const&) (mainFrame=<optimized out>, functor=...) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/page/Page.cpp:3720 #6 0x00007fefc2865bc1 in WebCore::Page::forEachDocument(WTF::Function<void (WebCore::Document&)> const&) const (this=0x7fefb10b0d80, functor=...) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/page/Page.cpp:3726 #7 WebCore::Page::doAfterUpdateRendering() (this=0x7fefb10b0d80) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/page/Page.cpp:1920 #8 0x00007fefc286572c in WebCore::Page::updateRendering() (this=0x7fefb10b0d80) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebCore/page/Page.cpp:1826 #9 0x00007fefc12225c0 in WebKit::CompositingCoordinator::flushPendingLayerChanges(WTF::OptionSet<WebCore::FinalizeRenderingUpdateFlags>) (this=0x7fefb1100838, flags=...) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/CompositingCoordinator.cpp:127 #10 0x00007fefc1227c15 in WebKit::LayerTreeHost::layerFlushTimerFired() (this=0x7fefb1100740) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.cpp:160 #11 WebKit::LayerTreeHost::renderNextFrame(bool) (this=0x7fefb1100740, forceRepaint=false) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.cpp:484 #12 0x00007fefc0ee53de in WebKit::ThreadedDisplayRefreshMonitor::displayRefreshCallback() (this=0x7fefb110ff00) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedDisplayRefreshMonitor.cpp:133 #13 0x00007fefbfa74e23 in WTF::RunLoop::TimerBase::TimerBase(WTF::RunLoop&)::$_3::operator()(void*) const (userData=0x7fefb110ff38, this=<optimized out>) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WTF/wtf/glib/RunLoopGLib.cpp:177 #14 WTF::RunLoop::TimerBase::TimerBase(WTF::RunLoop&)::$_3::__invoke(void*) (userData=0x7fefb110ff38) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WTF/wtf/glib/RunLoopGLib.cpp:169 #15 0x00007fefbfa74161 in WTF::RunLoop::$_0::operator()(_GSource*, int (*)(void*), void*) const (source=0x5637b45ad090, callback=0x7fefbfa74d90 <WTF::RunLoop::TimerBase::TimerBase(WTF::RunLoop&)::$_3::__invoke(void*)>, userData=0x7fefb110ff38, this=<optimized out>) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WTF/wtf/glib/RunLoopGLib.cpp:53 #16 WTF::RunLoop::$_0::__invoke(_GSource*, int (*)(void*), void*) (source=0x5637b45ad090, callback=0x7fefbfa74d90 <WTF::RunLoop::TimerBase::TimerBase(WTF::RunLoop&)::$_3::__invoke(void*)>, userData=0x7fefb110ff38) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WTF/wtf/glib/RunLoopGLib.cpp:45 #17 0x00007fefbc778d49 in g_main_dispatch (context=<optimized out>) at ../glib/gmain.c:3460 #18 g_main_context_dispatch (context=<optimized out>) at ../glib/gmain.c:4200 #19 0x00007fefbc7792a8 in g_main_context_iterate (context=0x5637b4219940, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4276 #20 0x00007fefbc77958f in g_main_loop_run (loop=0x5637b423caa0) at ../glib/gmain.c:4479 #21 0x00007fefbfa74746 in WTF::RunLoop::run() () at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WTF/wtf/glib/RunLoopGLib.cpp:108 #22 0x00007fefc1237217 in WebKit::AuxiliaryProcessMainBase<WebKit::WebProcess, true>::run(int, char**) (this=0x7fffe6061be0, argc=3, argv=0x7fffe6061d78) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebKit/Shared/AuxiliaryProcessMain.h:71 #23 WebKit::AuxiliaryProcessMain<WebKit::WebProcessMainGtk>(int, char**) (argc=3, argv=0x7fffe6061d78) at /buildstream/gnome/sdk/webkitgtk-6.0.bst/Source/WebKit/Shared/AuxiliaryProcessMain.h:97 #24 0x00007fefc002954a in __libc_start_call_main (main=main@entry=0x5637b3e52150 <main>, argc=argc@entry=3, argv=argv@entry=0x7fffe6061d78) at ../sysdeps/nptl/libc_start_call_main.h:58 #25 0x00007fefc002960b in __libc_start_main_impl (main=0x5637b3e52150 <main>, argc=3, argv=0x7fffe6061d78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized out>) at ../csu/libc-start.c:389 #26 0x00005637b3e52085 in _start () Full backtrace attached. 1952749 1 mcatanzaro 2023-05-03 15:10:43 -0700 This seems to be one of our most frequent crashers currently. 1956249 2 mcatanzaro 2023-05-18 13:37:17 -0700 (In reply to Michael Catanzaro from comment #0) > Created attachment 465886 [details] > Full backtrace > > Here's yet another random non-reproducible SIGSEGV crash that occurred when > loading some page. Note the this=0x0: Oooh, I figured out that it happens when viewing this page: https://www.riverfronttimes.com/news/i-challenged-st-louis-officials-to-go-car-free-for-one-day-40076892 It's not 100% reproducible but if you stay on the page for a while, maybe scroll up and down, it should hopefully crash eventually. Hit it twice just now. 1956251 3 mcatanzaro 2023-05-18 13:39:02 -0700 Hit twice more in two minutes. This is a good reproducer. 1956427 4 cgarcia 2023-05-19 03:27:54 -0700 Pull request: https://github.com/WebKit/WebKit/pull/14066 1956840 5 zan 2023-05-21 23:48:49 -0700 (In reply to Carlos Garcia Campos from comment #4) > Pull request: https://github.com/WebKit/WebKit/pull/14066 Why is a null buffer returned? 1956846 6 cgarcia 2023-05-22 00:17:13 -0700 (In reply to Zan Dobersek from comment #5) > (In reply to Carlos Garcia Campos from comment #4) > > Pull request: https://github.com/WebKit/WebKit/pull/14066 > > Why is a null buffer returned? I don't know, I can't reproduce it, that's why I added the error messages for the situations in which getBuffer can return nullptr. In any case, getBuffer() can return nullptr, so we should either handle the case in callers if that's expected (and it's indeed already handled in other caller), or turn those into asserts if they are unexpected. 1957918 7 mcatanzaro 2023-05-25 09:19:59 -0700 (In reply to Zan Dobersek from comment #5) > Why is a null buffer returned? Testing the pull request, I see that now instead of crashing, we get an error message: Failed to get GBM buffer from swap chain: no buffers available 1958578 8 ews-feeder 2023-05-29 00:57:34 -0700 Committed 264648@main (153153309cef): <https://commits.webkit.org/264648@main> Reviewed commits have been landed. Closing PR #14066 and removing active labels. 1965163 9 mcatanzaro 2023-07-05 11:10:17 -0700 Unfortunately another user has reported this same crash using WebKitGTK 2.40.3 (which has the backported fix) in bug #258831, so looks like it's not fixed after all. I considered marking that bug as a duplicate of this one and reopening this one, but decided to wait to see what you (Carlos Garcia and Zan) prefer to do with it. 465886 2023-04-13 09:07:31 -0700 2023-04-13 09:07:31 -0700 Full backtrace gdb.txt text/plain 13154 mcatanzaro IzAgIFdlYkNvcmU6OkdCTUJ1ZmZlclN3YXBjaGFpbjo6QnVmZmVyOjpoYW5kbGUoKSBjb25zdCAo dGhpcz0weDApCiAgICBhdCAvYnVpbGRzdHJlYW0vZ25vbWUvc2RrL3dlYmtpdGd0ay02LjAuYnN0 L1NvdXJjZS9XZWJDb3JlL3BsYXRmb3JtL2dyYXBoaWNzL2dibS9HQk1CdWZmZXJTd2FwY2hhaW4u aDoxMDAKICAgICAgICByZXN0b3JlQmluZGluZyA9IHttX2JpbmRpbmdQb2ludCA9IDM1NTMsIG1f YmluZGluZ1ZhbHVlID0gMn0KICAgICAgICB0ZXh0dXJlVGFyZ2V0ID0gMzU1MwoKICAgICAgICAg ICAgICAgICAgcmVzdWx0ID0ge2l0ZXJhdG9yID0ge21faXRlcmF0b3IgPSB7bV9wb3NpdGlvbiA9 IDxvcHRpbWl6ZWQgb3V0PiwgbV9lbmRQb3NpdGlvbiA9IDxvcHRpbWl6ZWQgb3V0Pn19LCBpc05l d0VudHJ5ID0gPG9wdGltaXplZCBvdXQ+fQojMSAgV2ViQ29yZTo6R3JhcGhpY3NDb250ZXh0R0xH Qk06OmFsbG9jYXRlRHJhd0J1ZmZlck9iamVjdCgpICh0aGlzPTB4N2ZlZjAxMDZjMTEwKQogICAg 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