Messages in this thread | | | Date | Thu, 11 Feb 2016 18:32:33 +0100 | From | Willy Tarreau <> | Subject | Re: [PATCH 3.12 32/64] unix: properly account for FDs passed over unix sockets |
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Hi Jiri,
On Thu, Feb 11, 2016 at 02:59:08PM +0100, Jiri Slaby wrote: > From: willy tarreau <w@1wt.eu> > > 3.12-stable review patch. If anyone has any objections, please let me know. > > =============== > > [ Upstream commit 712f4aad406bb1ed67f3f98d04c044191f0ff593 ] > > It is possible for a process to allocate and accumulate far more FDs than > the process' limit by sending them over a unix socket then closing them > to keep the process' fd count low. > > This change addresses this problem by keeping track of the number of FDs > in flight per user and preventing non-privileged processes from having > more FDs in flight than their configured FD limit. > > Reported-by: socketpair@gmail.com > Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> > Mitigates: CVE-2013-4312 (Linux 2.0+) > Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> > Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> > Signed-off-by: Willy Tarreau <w@1wt.eu> > Signed-off-by: David S. Miller <davem@davemloft.net> > Signed-off-by: Jiri Slaby <jslaby@suse.cz>
A possible issue was reported regarding this patch, and Hannes implemented a fix that's not yet in mainline. I guess it's preferable to postpone this patch for now.
Thanks, Willy
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