170332 2017-03-31 01:42:09 -0700 [GTK+] Crash in WebCore::ImageFrame::ImageFrame() 2017-05-15 18:21:35 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 magomez magomez bugs-noreply cgarcia commit-queue sabouhallawa webkit-bug-importer oldest_to_newest 1293122 0 magomez 2017-03-31 01:42:09 -0700 The web process is crashing when loading https://philip.html5.org/tests/apng/tests.html, which is a suite of png images and animations. The backtrace is #0 0x00000000012ecd93 in WebCore::ImageFrame::ImageFrame() () #1 0x00000000012eea14 in WebCore::ImageFrameCache::growFrames() () #2 0x00000000012f1087 in WebCore::ImageSource::dataChanged(WebCore::SharedBuffer*, bool) () #3 0x000000000113ffbc in WebCore::CachedImage::finishLoading(WebCore::SharedBuffer*) () #4 0x0000000001104742 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) () #5 0x00007f3d70309be6 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)) () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37 #6 0x00007f3d7030994f in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37 #7 0x00007f3d6ff9856b in IPC::Connection::dispatchMessage(std::unique_ptr<IPC::Decoder, std::default_delete<IPC::Decoder> >) () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37 #8 0x00007f3d6ff990d8 in IPC::Connection::dispatchOneMessage() () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37 #9 0x00007f3d6cdcc91d in WTF::RunLoop::performWork() () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18 #10 0x00007f3d6cdcb789 in WTF::RunLoop::RunLoop()::{lambda(void*)#1}::_FUN(void*) () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18 #11 0x00007f3d68401e52 in g_main_dispatch (context=0x1f95f00) at gmain.c:3203 #12 0x00007f3d68401e52 in g_main_context_dispatch (context=context@entry=0x1f95f00) at gmain.c:3856 #13 0x00007f3d684021d0 in g_main_context_iterate (context=0x1f95f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3929 #14 0x00007f3d684024f2 in g_main_loop_run (loop=0x20462d0) at gmain.c:4125 #15 0x00007f3d6cdcc050 in WTF::RunLoop::run() () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18 #16 0x00007f3d702c9cb9 in int WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebProcessMain>(int, char**) () at /home/magomez/webkit/WebKit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37 #17 0x00007f3d62f46401 in __libc_start_main (main=0xa0c020 <main>, argc=2, argv=0x7fff6a2a5548, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff6a2a5538) at ../csu/libc-start.c:289 #18 0x0000000000a0c1aa in _start () but I think that the problem is in the number of frames gotten from one of the animations. 1295968 1 magomez 2017-04-10 05:14:20 -0700 The problematic image is https://philip.html5.org/tests/apng/044.png, which belongs to a test that checks for invalid images. The rest reports 2 frames in its acTL segment, but then a single fdAT segment is found, meaning that there's only data from a single frame. ImageFrameCache::frameCount() initially reports 2 frames and ImageFrameCache::growFrames() is called to accomodate those 2 frames, but at some point ImageFrameCache::frameCount() starts returning 1 (I guess the decoder realizes there's no data for the second frame), and ImageFrameCache::growFrames() gets called again using a frameCount value smaller that the value it had, which causes the crash. There's an assertion ensuring that (m_frames.size() <= frameCount()) that gets triggered on debug mode warning about this. 1297889 2 307267 magomez 2017-04-17 06:22:30 -0700 Created attachment 307267 Patch 1298232 3 307363 magomez 2017-04-18 02:49:00 -0700 Created attachment 307363 Patch 1298262 4 307363 commit-queue 2017-04-18 04:54:57 -0700 Comment on attachment 307363 Patch Clearing flags on attachment: 307363 Committed r215458: <http://trac.webkit.org/changeset/215458> 1298263 5 commit-queue 2017-04-18 04:56:08 -0700 All reviewed patches have been landed. Closing bug. 1308920 6 sabouhallawa 2017-05-15 18:21:35 -0700 <rdar://problem/28905851> 307267 2017-04-17 06:22:30 -0700 2017-04-18 02:49:00 -0700 Patch patch.patch text/plain 4321 magomez ZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL0NoYW5nZUxvZyBiL0xheW91dFRlc3RzL0NoYW5nZUxv ZwppbmRleCBmMzBhMWU5Li42YmU2NzEyIDEwMDY0NAotLS0gYS9MYXlvdXRUZXN0cy9DaGFuZ2VM b2cKKysrIGIvTGF5b3V0VGVzdHMvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMTcgQEAKKzIwMTctMDQt MTcgIE1pZ3VlbCBHb21leiAgPG1hZ29tZXpAaWdhbGlhLmNvbT4KKworICAgICAgICBbR1RLK10g Q3Jhc2ggaW4gV2ViQ29yZTo6SW1hZ2VGcmFtZTo6SW1hZ2VGcmFtZSgpCisgICAgICAgIGh0dHBz Oi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xNzAzMzIKKworICAgICAgICBSZXZp ZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBBZGRlZCBhIHRlc3QgdG8gZW5zdXJl IHRoYXQgdGhlIGJyb3dzZXIgZG9lc24ndCBjcmFzaCB3aGVuIGxvYWRpbmcgYSBQTkcgaW1hZ2Ug d2hpY2gKKyAgICAgICAgcmVwb3J0cyBhIHdyb25nIG51bWJlciBvZiBmcmFtZXMuCisKKyAgICAg ICAgKiBmYXN0L2ltYWdlcy9iYWQtcG5nLW1pc3NpbmctZmRhdC1leHBlY3RlZC50eHQ6IEFkZGVk 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