On 6/24/2020 1:30 AM, Marco Atzeri via Cygwin wrote:
On 23.06.2020 23:02, Marco Atzeri wrote:
On 23.06.2020 22:56, Ken Brown via Cygwin wrote:
I think I've found the problem, although it will take patching and rebuilding
ImageMagick (which I haven't done) to confirm that I'm right.
In the ImageMagick source file coders/ps.c:237, there's a call to
ghost_info->new_instance, a.k.a. gsapi_new_instance (see line 214). The
documentation of the latter in the ghostscript sources (psi/iapi.c:57) says
that the first argument pinstance should satisfy *pinstance == NULL in the
first call to that function.
But *pinstance in this call is the variable 'interpreter', defined without
initialization in ps.c:191. As a result, **pinstance contains garbage, and
the program eventually crashes when it tries to dereference a garbage pointer.
The fix, if I'm right, is to initialize interpreter to NULL in ps.c:191.
Ken
Noted.
Regards
MArco
a test ImageMagick-6.9.10.11-3 is going up.
Let me know if it solves the problem
That fixes it for my .eps file. I didn't think of it before, but a similar
patch to coders/pdf.c:201 will be needed for .pdf files. I won't be able to
test that because I haven't found a .pdf file that exhibits the problem.
Ken
Ken
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