From owner-freebsd-jail@FreeBSD.ORG  Tue Aug  3 10:38:17 2010
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From: Stef Walter <stef-list@memberwebs.com>
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Date: Tue,  3 Aug 2010 10:38:17 +0000 (UTC)
Subject: segfault  after recvmsg in 32-bit jail running on 64-bit kernel
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I'm running older 32-bit jails on a new 64-bit kernels for some clients.
Ran into a problem with certain applications that use recvmsg (in this
case clamd from security/clamav port).

recvmsg() uses struct msghdr for in/out data. However in many cases the
msg_controllen is not properly set after calling recvmsg() from from a
32-bit process running on a 64-bit kernel.

Just wanted to give folks a heads up in case anyone runs into the same
issue.

PR filed with details, patch and test program to reproduce problem:

http://www.freebsd.org/cgi/query-pr.cgi?pr=149227

Cheers,

Stef


PS: I'm travelling and this computer is not receiving email from the
list, so please include me on any responses to this thread.