Date: Wed, 28 Jul 1999 19:40:18 -0400 (EDT) From: Bill Paul <wpaul@skynet.ctr.columbia.edu> To: dillon@apollo.backplane.com (Matthew Dillon) Cc: crossd@cs.rpi.edu, current@FreeBSD.ORG Subject: Re: IRIX 6.5.4 NFS v3 TCP client + FreeBSD server = bewm Message-ID: <199907282340.TAA15454@skynet.ctr.columbia.edu> In-Reply-To: <199907282309.QAA64183@apollo.backplane.com> from "Matthew Dillon" at Jul 28, 99 04:09:06 pm
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Of all the gin joints in all the towns in all the world, Matthew Dillon had to walk into mine and say: > :This is yet another problem that we have run into here. If you check the > :digest for -hackers it was reported awhile ago (mike smith even cc-ed it > :to security since it may have been a kernel stack overflow) . Anyway, the > :problem is that IRIX defaults to 32K packets on TCP NFSv3 mounts, and > :16K on UDP NFSv3 mounts. I recommend using UDP and setting rsize=8192, > :wsize=8192 in your amd maps (as we do now, no problems at all). > : > :-- > :David Cross | email: crossd@cs.rpi.edu > :Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd > > Ah ha! Yes, 32K packets will certainly screw up NFS under FreeBSD. Uh.... could you elaborate a little? No, strike that: could you elaborate a *lot*. A whole lot. > We need to fix that panic to have it simply drop the packet, I guess. No, we need to fix the code so it handles 32K "packets" (datagrams) correctly. -Bill -- ============================================================================= -Bill Paul (212) 854-6020 | System Manager, Master of Unix-Fu Work: wpaul@ctr.columbia.edu | Center for Telecommunications Research Home: wpaul@skynet.ctr.columbia.edu | Columbia University, New York City ============================================================================= "It is not I who am crazy; it is I who am mad!" - Ren Hoek, "Space Madness" ============================================================================= To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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