lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 22 May 2020 17:59:19 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, brouer@...hat.com,
        daniel@...earbox.net, john.fastabend@...il.com, ast@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com, andriin@...com,
        dsahern@...il.com, David Ahern <dsahern@...nel.org>
Subject: Re: [PATCH RFC bpf-next 0/4] bpf: Add support for XDP programs in DEVMAPs

David Ahern <dsahern@...nel.org> writes:

> Implementation of Daniel's proposal for allowing DEVMAP entries to be
> a device index, program id pair. Daniel suggested an fd to specify the
> program, but that seems odd to me that you insert the value as an fd, but
> read it back as an id since the fd can be closed.

While I can be sympathetic to the argument that it seems odd, every
other API uses FD for insert and returns ID, so why make it different
here? Also, the choice has privilege implications, since the CAP_BPF
series explicitly makes going from ID->FD a more privileged operation
than just querying the ID.

-Toke

Powered by blists - more mailing lists