[Pkg-phototools-devel] Bug#991051: opencolorio-tools: ocioconvert crash exporting in PNG when EXR input is multi layer

[Dorian Fevrier]

Package: opencolorio-tools
Version: 1.1.0~dfsg0-5
Severity: normal

Hello maintainers,

First, thanks for you hard work.

I hope you will not waste too much time with this one.

System: Debian 10 buster
Kernel 4.19

Step to reproduce:

Download ACES 1.2 from here and extract it: https://github.com/colour-
science/OpenColorIO-Configs/releases/tag/v1.2

Open a terminal, set the OCIO variable:

export OCIO=/path/to/ACES/config.ocio

And execute this command with given file:

ocioconvert one_pixel.exr 'ACEScg' out.png 'Output - sRGB'

This will crash:

Loading one_pixel.exr
Segmentation fault

Notice this image is a cropped 1x1 pixel on a bigger image, but the problem is
the same with a bigger image.

Using gdb, I can find it's related to OpenImageIO/PNG:

Thread 1 "ocioconvert" received signal SIGSEGV, Segmentation fault.
__sigsetjmp () at ../sysdeps/x86_64/setjmp.S:32
32 ../sysdeps/x86_64/setjmp.S: No such file or directory.
(gdb) bt
#0  0x00007ffff6e973b0 in __sigsetjmp () at ../sysdeps/x86_64/setjmp.S:32
#1  0x00007ffff7dbf7f9 in
OpenImageIO_v2_0::PNG_pvt::write_row(png_struct_def*&, unsigned char*) ()
    at /lib/x86_64-linux-gnu/libOpenImageIO.so.2.0
#2  0x00007ffff7e00657 in OpenImageIO_v2_0::PNGOutput::write_scanline(int, int,
OpenImageIO_v2_0::TypeDesc, void const*, long) () at /lib/x86_64-linux-
gnu/libOpenImageIO.so.2.0
#3  0x00007ffff7caf90b in OpenImageIO_v2_0::ImageOutput::write_scanlines(int,
int, int, OpenImageIO_v2_0::TypeDesc, void const*, long, long) () at
/lib/x86_64-linux-gnu/libOpenImageIO.so.2.0
#4  0x00007ffff7cafc92 in
OpenImageIO_v2_0::ImageOutput::write_image(OpenImageIO_v2_0::TypeDesc, void
const*, long, long, long, bool (*)(void*, float), void*) () at
/lib/x86_64-linux-gnu/libOpenImageIO.so.2.0
#5  0x000055555555c307 in main ()

If you try with jpeg or tif, it works:

$ ocioconvert one_pixel.exr 'ACEScg' out.jpg 'Output - sRGB'
Loading one_pixel.exr
Wrote out.jpg

$ ocioconvert one_pixel.exr 'ACEScg' out.tif 'Output - sRGB'
Loading one_pixel.exr
Wrote out.tif

And image is as expected.

Adding a "--ch 1,2,3" seems to avoid the crash.

I suspect its a bug in upstream OpenImageIO or OpenColorIO. Maybe it's fixed in
upstream.

Hope you can report it.

Once again, thanks for the good work team!

Thanks, and have a nice day!

Dorian



-- System Information:
Debian Release: 10.7
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-13-amd64 (SMP w/12 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages opencolorio-tools depends on:
ii  libc6              2.28-10
ii  libgcc1            1:8.3.0-6
ii  liblcms2-2         2.9-3
ii  libopencolorio1v5  1.1.0~dfsg0-5
ii  libopenimageio2.0  2.0.5~dfsg0-1
ii  libstdc++6         8.3.0-6
ii  libtinyxml2.6.2v5  2.6.2-4
ii  libyaml-cpp0.6     0.6.2-4

opencolorio-tools recommends no packages.

opencolorio-tools suggests no packages.
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