Messages in this thread |  | | From | Andy Lutomirski <> | Date | Tue, 7 Jan 2020 20:39:10 -0800 | Subject | Re: [PATCH RFC 1/1] mount: universally disallow mounting over symlinks |
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On Mon, Dec 30, 2019 at 12:29 AM Aleksa Sarai <cyphar@cyphar.com> wrote: > > On 2019-12-29, Linus Torvalds <torvalds@linux-foundation.org> wrote: > > On Sun, Dec 29, 2019 at 9:21 PM Aleksa Sarai <cyphar@cyphar.com> wrote: > > If allowing bind-mounts over symlinks is allowed (which I don't have a > problem with really), it just means we'll need a few more kernel pieces > to get this hardening to work. But these features would be useful > outside of the problems I'm dealing with (O_EMPTYPATH and some kind of > pidfd-based interface to grab the equivalent of /proc/self/exe and a few > other such magic-link targets).
As one data point, I would use this ability in virtme: this would allow me to more reliably mount over /etc/resolve.conf even when it's a symlink.
(Perhaps I should use overlayfs instead. Hmm.)
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