Bug#821321: libvorbisfile: ov_pcm_seek wrongly returns OV_EOF or segfaults sometimes

[Frank Heckenbach]

Hi Martin,

> Thank you for your bug report!
> 
> Judging from the code that reproduces the bug (two subsequent seeks to 
> 0) and from the related vorbis code you are mentioning, this sounds a 
> lot like #782831, which was fixed in 1.3.4-3. Could you confirm or 
> refute that theory by testing your code (I guess you have further 
> examples apart from the one you posted) with 1.3.4-3?

1.3.4-3 isn't on the main server anymore, but luckily I recently
learned about snapshot.debian.org. It may be old news for you, but
for anyone else who may be reading this report and doesn't know
about it, I fetched the following two files and rebuilt them
(together with the origial libvorbis_1.3.4.orig.tar.gz from jessie).
I didn't try 1.3.5 yet as I want to change as little as possible in
the system.

http://snapshot.debian.org/archive/debian/20151001T033412Z/pool/main/libv/libvorbis/libvorbis_1.3.4-3.dsc
http://snapshot.debian.org/archive/debian/20151001T033412Z/pool/main/libv/libvorbis/libvorbis_1.3.4-3.debian.tar.xz

It did indeed fix the test case, and also my real case where I found
the problem. I'll do some more tests soon and report if I find more
problems, but I hope not.

Thanks,
Frank