After the valrgind 3.25.0 release a couple of bugs were found which are already fixed upstream on the VALGRIND_3_25_BRANCH (and already imported into fedora).

The most critical of these is a regression in the close_range syscall which makes it fail in certain cases where it shouldn't causing programs running under valgrind to have file descriptors in an inconsistent state.

A simple testcase from the pcp project that causes running pmrepconf under valgrind into an infinite loop producing lots of Warning: invalid file descriptor 1026 in syscall close()

1. dnf install pcp
2. systemctl start pmcd.service
3. touch /tmp/newfile
4. valgrind pmrepconf /tmp/newfile </dev/null