linux-kernel - Re: [PATCH 0/7] overlay filesystem: request for inclusion

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 linux-cve-announce 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, 15 Jul 2011 22:33:34 +0900
From:	"J. R. Okajima" <hooanon05@...oo.co.jp>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	NeilBrown <neilb@...e.de>, viro@...IV.linux.org.uk,
	torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, apw@...onical.com, nbd@...nwrt.org,
	hramrach@...trum.cz, jordipujolp@...il.com, ezk@....cs.sunysb.edu
Subject: Re: [PATCH 0/7] overlay filesystem: request for inclusion

Miklos Szeredi:
> Overlayfs will create a private clone of both the lower and upper
> mounts.  The mnt_flags are only modified on the private clone, whose
> sole user is overlayfs itself.

Yes, I've found overlayfs creates private clone mounts. Sorry noise
again.
By cloning privately, users cannot change mount flags. But it will not
be a big problem.

By the way, you might remember that I have asked about overriding
creditials and signals.
When a process issues chmod, rename or something, then the internal
copyup happens. If RLIMIT_FSIZE is set to the process, then it may
fire SIGXFSZ and return EFBIG. It looks strange. But I don't know how
important is it since setting RLIMIT_FSIZE is less popular I am afraid.

J. R. Okajima
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/