Date: Sun, 12 Dec 2004 20:24:17 -0500 (EST) From: Atom 'Smasher' <atom@suspicious.org> To: gnupg-devel@gnupg.org, freebsd-bugs@freebsd.org Subject: GnuPG + FreeBSD 5.3 = intermitent memory warning Message-ID: <20041212192018.P99530@willy.wonka> In-Reply-To: <20041210150749.GA1379@jabberwocky.com> References: <20041208014034.A62757@willy.wonka> <20041210150749.GA1379@jabberwocky.com>
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The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --0-625275858-1102901057=:99530 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ** cross posted ** for those not familiar with GnuPG, read here for relevant background info: http://www.gnupg.org/documentation/faqs.html#q6.1 if the binary is suid-root, it should not generate warnings about insecure memory. my binary *is* suid-root, and whether it's run as a privileged or unprivileged user i get intermittent warnings about insecure memory. i only noticed this intermittent behavior after upgrading from FreeBSD 4.9 to 5.3. i'm seeing essentially the same results with GnuPG 1.2 and 1.3 branches. attached is a script and the output from 1000000 invocations of gpg (just over 24 hours on a duron-1200). there were 543398 (almost 55%) errors. at first i thought that there was a relation between the errors and downloading large files, but now i'm not sure if that's a factor. SHA-1 checksums: 126694aa13085e757c1fb75e105549b9d6997fc2 gnupg_err.txt.gz 6332229dafcc8f5b4becfc74fd2f39b9af4d2164 gpg_memory_warning.sh.gz the "gnupg_err.txt" was produced by running: ./gpg_memory_warning.sh 1000 1000 | tee gnupg_err.txt On Fri, 10 Dec 2004, David Shaw wrote: > On Wed, Dec 08, 2004 at 02:12:30AM -0500, Atom 'Smasher' wrote: > >> i thought i was either going crazy or stupid, but i really am getting >> intermittent warnings: >> WARNING: using insecure memory! >> >> the test above is unique, because usually in a test of 100, 500, or 1000 >> trials i get either 0% or 100% warnings. before getting that result, i got >> a bunch of 100% error... after running that test i got a bunch of 0% >> error. >> >> i suspect that it might be a bug in FreeBSD 5.3-RELEASE since i haven't >> noticed it before. now i'm having the same problem with 1.2.6 and 1.3.92. >> has anyone else noticed this? > > I tried to duplicate it on Linux, but without any luck. It might be a > FreeBSD thing, or it might be something particular to your machine? > I've never heard of this happenening, even on FreeBSD, so I don't know > what to think yet. > >> please advise how to trace this problem when it appears... i'm not sure >> which --debug flag(s) or process-tracking applications (with what options) >> will be most useful. > > If you do C, take a peek at the code in util/secmem.c:lock_pool. It > is unfortunately quite rich in #ifdefs since locking memory is pretty > platform-specific. Add some debugging there - say, printing out errno > whenever mlock() returns -1. ================= i'm not much good in C :( - -- ...atom _________________________________________ PGP key - http://atom.smasher.org/pgp.txt 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808 ------------------------------------------------- "Military men are just dumb stupid animals to be used as pawns in foreign policy." -- Henry Kissinger, Kiss the Boys Goodbye: How the United States Betrayed Its Own POWs in Vietnam -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.3.92 (FreeBSD) Comment: What is this gibberish? 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