Please what are the file permissions on /tmp/libpng_1.2.37.orig.tar.gz.tmp-extract.Gj0Er/libpng-1.2.37 ?
Paste the output of the commands below: ls -l /tmp/libpng_1.2.37.orig.tar.gz.tmp-extract.Gj0Er/libpng-1.2.37 umask
I don't think that dpkg is to blame here. It's more likely some invalid permissions via umask or similar.
Please what are the file permissions on /tmp/libpng_ 1.2.37. orig.tar. gz.tmp- extract. Gj0Er/libpng- 1.2.37 ?
Paste the output of the commands below: 1.2.37. orig.tar. gz.tmp- extract. Gj0Er/libpng- 1.2.37
ls -l /tmp/libpng_
umask
I don't think that dpkg is to blame here. It's more likely some invalid permissions via umask or similar.