Date: Thu, 29 Dec 2011 10:26:17 -0800 From: Xin Li <delphij@delphij.net> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-security@freebsd.org, Doug Barton <dougb@freebsd.org>, d@delphij.net Subject: Re: svn commit: r228843 - head/contrib/telnet/libtelnet head/crypto/heimdal/appl/telnet/libtelnet head/include head/lib/libc/gen head/lib/libc/iconv head/lib/libc/include head/lib/libc/net head/libexec... Message-ID: <4EFCB0C9.6090608@delphij.net> In-Reply-To: <201112290939.53665.jhb@freebsd.org> References: <201112231500.pBNF0c0O071712@svn.freebsd.org> <4EF6444F.6090708@FreeBSD.org> <CAGMYy3uzLXMvw40q1hM9dnHGxxh%2BeO_8Y1nbNKsPSB_Aenmm7w@mail.gmail.com> <201112290939.53665.jhb@freebsd.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/29/11 06:39, John Baldwin wrote: > Can you give some more details on why ftpd is triggering a dlopen > inside of the chroot? It would appear that that is unrelated to > helper programs (since setting a flag in libc in ftpd can't > possibly affect helper programs ability to use dlopen() from within > libc). Sure. That's because nsdispatch(3) would reload /etc/nsswitch.conf if it notices a change. After chroot() the file is considered as "chang"ed and thus it reloads the file as well as designated shared libraries. Cheers, - -- Xin LI <delphij@delphij.net> https://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk78sMkACgkQOfuToMruuMAu9wCbBevDzZFX9eHBYHtN1iOw9iG2 Z2oAnjYrxskRMyu0ygqesoi7UgrjumWv =N7gZ -----END PGP SIGNATURE-----
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