[cairo-bugs] [Bug 100713] New: Valgrind invalid/read write errors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100713

            Bug ID: 100713
           Summary: Valgrind invalid/read write errors
           Product: cairo
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: xlib backend
          Assignee: chris at chris-wilson.co.uk
          Reporter: colinnkeenan at gmail.com
        QA Contact: cairo-bugs at cairographics.org

Created attachment 130905
  --> https://bugs.freedesktop.org/attachment.cgi?id=130905&action=edit
full valgrind output

When testing my application (https://github.com/colinkeenan/silentcast), using
valgrind, I am getting numerous Invalid read and write errors whenever my
application shows a window with a grid of widgets and labels. My application
can only run on X11 so I chose xlib backend for reporting this bug.

cairo 1.14.8
gtk3 3.22.10
Arch Linux 4.10.10-1-ARCH
plasma-desktop 5.9.4

valgrind -v --tool=memcheck --leak-check=full --leak-resolution=high
--num-callers=20 --log-file=vgdump scpkg/silentcast

I've attached the full output (vgdump).

Here is the specific error:

==15458== 168 errors in context 1 of 66:
==15458== Invalid read of size 4
==15458==    at 0x6689F2A: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x668BADE: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x668C940: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x668D0A9: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x662E5EF: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x66A81C7: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x667A0A6: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x663769B: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x6630008: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x6628E74: cairo_fill (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x5306A27: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5304478: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x541EDA6: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52EA451: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5316993: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x54FCC0A: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52E06EF: gtk_container_propagate_draw (in
/usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52E07D1: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5361223: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52E572C: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==  Address 0xffeffe678 is on thread 1's stack
==15458== 
==15458== 
==15458== 168 errors in context 2 of 66:
==15458== Invalid write of size 4
==15458==    at 0x668C90D: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x668D0A9: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x662E5EF: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x66A81C7: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x667A0A6: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x663769B: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x6630008: ??? (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x6628E74: cairo_fill (in /usr/lib/libcairo.so.2.11400.8)
==15458==    by 0x5306A27: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5304478: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x541EDA6: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52EA451: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5316993: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x54FCC0A: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52E06EF: gtk_container_propagate_draw (in
/usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52E07D1: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5361223: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52E572C: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x52EA56F: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==    by 0x5362300: ??? (in /usr/lib/libgtk-3.so.0.2200.10)
==15458==  Address 0xffeffe678 is on thread 1's stack
==15458== 
==15458== ERROR SUMMARY: 400 errors from 66 contexts (suppressed: 0 from 0)


Is this a recurrence of a bug from 5 years ago?:
https://bugs.freedesktop.org/show_bug.cgi?id=52548

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