On 9/14/20 6:31 PM, Cameron Nemo via GNU coreutils Bug Reports wrote:
It seems like relying on the /proc link is not ideal,
and a bug is being hidden by such behavior.
Is there any chance that this can be resolved?
It really should be fixed in the Linux kernel: it needs a proper way to
implement POSIX fchmodat <https://pubs.opengroup.org/onlinepubs/9699919799/>
with the AT_SYMLINK_NOFOLLOW flag, in order to plug some security holes
involving symlink attacks. See:
https://bugzilla.redhat.com/show_bug.cgi?id=1810141
https://lkml.org/lkml/2020/6/9/548
In the meantime, mounting /proc may be your best bet. I vaguely recall there are
other places in glibc that assume /proc.
