Bug 100713

Summary:	Valgrind invalid/read write errors
Product:	cairo	Reporter:	Colin Keenan <colinnkeenan>
Component:	xlib backend	Assignee:	Chris Wilson <chris>
Status:	RESOLVED MOVED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	full valgrind output

Description Colin Keenan 2017-04-18 15:17:58 UTC

Created attachment 130905 [details]
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

Comment 1 GitLab Migration User 2018-08-25 14:02:48 UTC

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