Date: Mon, 29 May 2000 10:30:04 -0700 (PDT) From: Alexander Langer <alex@big.endian.de> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/18874: 32bit NFS servers export wrong negative values to 64bit clients Message-ID: <200005291730.KAA58686@freefall.freebsd.org>
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The following reply was made to PR kern/18874; it has been noted by GNATS. From: Alexander Langer <alex@big.endian.de> To: Anatoly Vorobey <mellon@pobox.com> Cc: FreeBSD-gnats-submit@FreeBSD.ORG Subject: Re: kern/18874: 32bit NFS servers export wrong negative values to 64bit clients Date: Mon, 29 May 2000 19:21:40 +0200 Thus spake Anatoly Vorobey (mellon@pobox.com): > Gotta love those signed<-->unsigned bugs ;) Isn't that 32bit signed vs. 64bit signed? > but I don't really have a working setup with Alpha NFS to test this against. On the client, I guess? (the patch). Will it break the i386 nfs? > A brief explanation: tquad is 64-bit unsigned, and holds the available > bytes value which is really signed long. Suppose the real value is negative. > If we divide it by NFS_FABLKSIZE first, and then > cast to long, we risk turning it into a positive value by division. Yes, but what about i386, where long is only 32bit and can't hold that value? Alex -- I need a new ~/.sig. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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