Bug#496163: AI-written SVG icons cause segfaults?!

[Trent W. Buck]

Package: gnome-accessibility-themes
Version: 2.22.2-1
Severity: important

Yesterday, Midori (a GTK2/webkit-based web browser) started
segfaulting on boot:

    $ strace midori 2>&1 | tail
    open("/home/twb/.local/share/midori/extensions", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
    clock_gettime(CLOCK_MONOTONIC, {49547, 289959979}) = 0
    clock_gettime(CLOCK_MONOTONIC, {49547, 294614521}) = 0
    gettimeofday({1219456699, 984930}, NULL) = 0
    open("/usr/share/icons/HighContrast-SVG/scalable/actions/gtk-find.svg", O_RDONLY|O_LARGEFILE) = 6
    fstat64(6, {st_mode=S_IFREG|0644, st_size=2073, ...}) = 0
    read(6, "<?xml version=\"1.0\" encoding=\"iso"..., 2073) = 2073
    close(6)                                = 0
    --- SIGSEGV (Segmentation fault) @ 0 (0) ---
    +++ killed by SIGSEGV +++

So I try opening that file (gtk-find.svg) in imagemagick:

    $ strace display /usr/share/icons/HighContrast-SVG/scalable/actions/gtk-find.svg 2>&1 | tail
    fstat64(4, {st_mode=S_IFREG|0644, st_size=2073, ...}) = 0
    mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f31000
    read(4, "<?xml version=\"1.0\" encoding=\"iso"..., 4096) = 2073
    read(4, ""..., 4096)                    = 0
    _llseek(4, 0, [0], SEEK_SET)            = 0
    mmap2(NULL, 2073, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7f30000
    close(4)                                = 0
    munmap(0xb7f31000, 4096)                = 0
    --- SIGSEGV (Segmentation fault) @ 0 (0) ---
    +++ killed by SIGSEGV +++

Xzgv also segfaults right after reading the xml declaration:

    $ strace xzgv /usr/share/icons/HighContrast-SVG/scalable/actions/gtk-find.svg 2>&1 | tail
    mmap2(NULL, 65096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 0xb6ed2000
    mmap2(0xb6ee1000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0xf) = 0xb6ee1000
    close(5)                                = 0
    munmap(0xb73b7000, 34054)               = 0
    _llseek(4, 0, [0], SEEK_SET)            = 0
    read(4, "<?xml version=\"1.0\" encoding=\"iso"..., 4096) = 2073
    read(4, ""..., 4096)                    = 0
    futex(0xb707c798, FUTEX_WAKE_PRIVATE, 2147483647) = 0
    --- SIGSEGV (Segmentation fault) @ 0 (0) ---
    +++ killed by SIGSEGV +++

And yet they work correctly if I open gtk-fullscreen.svg, for example.

Looking at some samples in Emacs suggests that all AI-written icons
cause the segfault, and all Inkscape-written icons work correctly.

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.25-2-686 (SMP w/1 CPU core)
Locale: LANG=en_AU.utf8, LC_CTYPE=en_AU.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnome-accessibility-themes depends on:
ii  gtk2-engines                  1:2.14.3-1 theme engines for GTK+ 2.x
ii  librsvg2-common               2.22.2-2   SAX-based renderer library for SVG

gnome-accessibility-themes recommends no packages.

gnome-accessibility-themes suggests no packages.

-- no debconf information