1603535 - null pointer passed as argument 2, which is declared to never be null in gfx/cairo/cairo/src/cairo-path-fixed.c:776

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Tyson Smith [:tsmith]]

Found with m-c 20191211-b823b005f00e
This is triggered with an UBSan build while running gtests. To enable this check add the following to your mozconfig:

ac_add_options --enable-undefined-sanitizer="nonnull-attribute"

[ RUN      ] APZEventRegionsTester.HitRegionImmediateResponse
gfx/cairo/cairo/src/cairo-path-fixed.c:776:6: runtime error: null pointer passed as argument 2, which is declared to never be null
/usr/include/string.h:43:28: note: nonnull attribute specified here
    #0 0x7f416985db2a in _cairo_path_buf_add_points gfx/cairo/cairo/src/cairo-path-fixed.c:775:5
    #1 0x7f416982e58f in _cairo_path_fixed_add gfx/cairo/cairo/src/cairo-path-fixed.c:723:5
    #2 0x7f416982fefc in _cairo_path_fixed_close_path gfx/cairo/cairo/src/cairo-path-fixed.c:655:14
    #3 0x7f416989ccf3 in INT__moz_cairo_close_path gfx/cairo/cairo/src/cairo.c:2178:14
    #4 0x7f4163127437 in gfxUtils::ClearThebesSurface(gfxASurface*) gfx/thebes/gfxUtils.cpp:809:3
    #5 0x7f416304eb4c in gfxPlatformGtk::CreateOffscreenSurface(mozilla::gfx::IntSizeTyped<mozilla::gfx::UnknownUnits> const&, mozilla::gfx::SurfaceFormat) gfx/thebes/gfxPlatformGtk.cpp:184:5
    #6 0x7f416303567a in gfxPlatform::Init() gfx/thebes/gfxPlatform.cpp:1031:51
    #7 0x7f4163034803 in gfxPlatform::GetPlatform() gfx/thebes/gfxPlatform.cpp:500:5
    #8 0x7f415e708006 in APZCTreeManagerTester::SetUp() gfx/layers/apz/test/gtest/APZCTreeManagerTester.h:24:5
    #9 0x7f415e5fb50b in testing::Test::Run() testing/gtest/gtest/src/gtest.cc:2515:3
    #10 0x7f415e5fc5b6 in testing::TestInfo::Run() testing/gtest/gtest/src/gtest.cc:2695:11
    #11 0x7f415e5fcf0a in testing::TestCase::Run() testing/gtest/gtest/src/gtest.cc:2813:28
    #12 0x7f415e60b2db in testing::internal::UnitTestImpl::RunAllTests() testing/gtest/gtest/src/gtest.cc:5179:43
    #13 0x7f415e60ad34 in testing::UnitTest::Run() testing/gtest/gtest/src/gtest.cc:4788:10
    #14 0x7f415e64cb64 in mozilla::RunGTestFunc(int*, char**) testing/gtest/mozilla/GTestRunner.cpp:158:10
    #15 0x7f416ba1a40e in XREMain::XRE_mainStartup(bool*) toolkit/xre/nsAppRunner.cpp:3764:16
    #16 0x7f416ba236cb in XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) toolkit/xre/nsAppRunner.cpp:4722:12
    #17 0x7f416ba2433b in XRE_main(int, char**, mozilla::BootstrapConfig const&) toolkit/xre/nsAppRunner.cpp:4818:21
    #18 0x55e1c0c27df2 in do_main(int, char**, char**) browser/app/nsBrowserApp.cpp:217:22
    #19 0x55e1c0c27500 in main browser/app/nsBrowserApp.cpp:339:16