Package: inkscape
Version: 0.48.5-3
Severity: normal
Tags: patch

Dear Maintainer,

$ gdb -q --args /usr/bin/inkscape test-pdf.svg
Reading symbols from /usr/bin/inkscape...done.
(gdb) run
Starting program: /usr/bin/inkscape test-pdf.svg
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe66dd700 (LWP 14025)]
[New Thread 0x7fff5442f700 (LWP 14030)]
[New Thread 0x7fff53bce700 (LWP 14033)]

Program received signal SIGSEGV, Segmentation fault.
nr_arena_image_pick (item=0x29f5e00, p=..., delta=<optimized out>) at display
/nr-arena-image.cpp:318
318             return (pix_ptr[3] > 0) ? item : NULL;
(gdb) p pix_ptr[3]
Cannot access memory at address 0x7ffedc831b83
(gdb) p /x pixels
$1 = 0x7fff5af7d010
(gdb) p /x pixels + iy * image->pxrs + ix * 4
$2 = 0x7fffdc831b80
(gdb) p /x malloc_usable_size(pixels)
[Thread 0x7fff53bce700 (LWP 14033) exited]
$3 = 0x85082ff0
(gdb) p /x pixels + malloc_usable_size(pixels)
$4 = 0x7ffee0000000
(gdb) p /x pixels + (unsigned)malloc_usable_size(pixels)
$5 = 0x7fffe0000000
(gdb) p /x pixels + (unsigned)(iy * image->pxrs + ix * 4)
$6 = 0x7fffdc831b80
(gdb) p /x pix_ptr
$7 = 0x7ffedc831b80
(gdb) whatis image->pxrs
type = unsigned int
(gdb) q
A debugging session is active.

        Inferior 1 [process 14021] will be killed.

Quit anyway? (y or n) y
ale@pcale:~/g/nano2016$



-- System Information:
Debian Release: 8.6
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages inkscape depends on:
ii  gconf-service          3.2.6-3
ii  libaspell15            0.60.7~20110707-1.3
ii  libatk1.0-0            2.14.0-1
ii  libatkmm-1.6-1         2.22.7-2.1
ii  libc6                  2.19-18+deb8u6
ii  libcairo2              1.14.0-2.1+deb8u1
ii  libcairomm-1.0-1       1.10.0-1.1
ii  libfontconfig1         2.11.0-6.3+deb8u1
ii  libfreetype6           2.5.2-3+deb8u1
ii  libgc1c2               1:7.2d-6.4
ii  libgcc1                1:4.9.2-10
ii  libgconf-2-4           3.2.6-3
ii  libgdk-pixbuf2.0-0     2.31.1-2+deb8u5
ii  libglib2.0-0           2.42.1-1+b1
ii  libglibmm-2.4-1c2a     2.42.0-1
ii  libgnomevfs2-0         1:2.24.4-6+b1
ii  libgomp1               4.9.2-10
ii  libgsl0ldbl            1.16+dfsg-2
ii  libgtk2.0-0            2.24.25-3+deb8u1
ii  libgtkmm-2.4-1c2a      1:2.24.4-1.1
ii  libgtkspell0           2.0.16-1.1
ii  liblcms2-2             2.6-3+b3
ii  libmagick++-6.q16-5    8:6.8.9.9-5+deb8u4
ii  libmagickcore-6.q16-2  8:6.8.9.9-5+deb8u4
ii  libmagickwand-6.q16-2  8:6.8.9.9-5+deb8u4
ii  libpango-1.0-0         1.36.8-3
ii  libpangocairo-1.0-0    1.36.8-3
ii  libpangoft2-1.0-0      1.36.8-3
ii  libpangomm-1.4-1       2.34.0-1.1
ii  libpng12-0             1.2.50-2+deb8u2
ii  libpoppler-glib8       0.26.5-2+deb8u1
ii  libpoppler46           0.26.5-2+deb8u1
ii  libpopt0               1.16-10
ii  librevenge-0.0-0       0.0.1-3
ii  libsigc++-2.0-0c2a     2.4.0-1
ii  libstdc++6             4.9.2-10
ii  libwpg-0.3-3           0.3.0-3
ii  libx11-6               2:1.6.2-3
ii  libxml2                2.9.1+dfsg1-5+deb8u3
ii  libxslt1.1             1.1.28-2+deb8u1
pn  python:any             <none>
ii  zlib1g                 1:1.2.8.dfsg-2+b1

Versions of packages inkscape recommends:
ii  aspell                             0.60.7~20110707-1.3
ii  imagemagick                        8:6.8.9.9-5+deb8u4
ii  libgnomevfs2-extra                 1:2.24.4-6+b1
ii  libimage-magick-perl [perlmagick]  8:6.8.9.9-5+deb8u4
ii  libwmf-bin                         0.2.8.4-10.3+deb8u1
ii  perlmagick                         8:6.8.9.9-5+deb8u4
ii  pstoedit                           3.62-2+b1
ii  python-lxml                        3.4.0-1
ii  python-numpy                       1:1.8.2-2
ii  transfig                           1:3.2.5.e-4

Versions of packages inkscape suggests:
ii  dia                  0.97.3-1
ii  dia-gnome            0.97.3-1
ii  libsvg-perl          2.59-1
ii  libxml-xql-perl      0.68-6
ii  python-uniconvertor  1.1.4-1+b2
ii  ruby                 1:2.1.5+deb8u2
ii  ruby1.8 [ruby]       1.8.7.358-7.1+deb7u3

-- no debconf information
--- a/src/display/nr-arena-image.cpp
+++ b/src/display/nr-arena-image.cpp
@@ -303,17 +303,17 @@
     } else {
 
         unsigned char *const pixels = image->px;
-        int const width = image->pxw;
-        int const height = image->pxh;
-        int const rowstride = image->pxrs;
+        unsigned int const width = (unsigned int)(image->pxw);
+        unsigned int const height = (unsigned int)(image->pxh);
+        unsigned int const rowstride = (unsigned int)(image->pxrs);
         Geom::Point tp = p * image->grid2px;
-        int const ix = (int)(tp[Geom::X]);
-        int const iy = (int)(tp[Geom::Y]);
+        unsigned int const ix = (unsigned int)(tp[Geom::X]);
+        unsigned int const iy = (unsigned int)(tp[Geom::Y]);
 
-        if ((ix < 0) || (iy < 0) || (ix >= width) || (iy >= height))
+        if ((ix >= width) || (iy >= height))
             return NULL;
 
-        unsigned char *pix_ptr = pixels + iy * rowstride + ix * 4;
+        unsigned char *pix_ptr = pixels + iy * rowstride + ix * 4U;
         // is the alpha not transparent?
         return (pix_ptr[3] > 0) ? item : NULL;
     }
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