Date: Thu, 6 Sep 2001 15:28:32 -0400 From: Steve Shorter <steve@nomad.lets.net> To: Fernando Schapachnik <fschapachnik@vianetworks.com.ar> Cc: edwin chan <slack@suntop-cn.com>, freebsd-security@FreeBSD.ORG Subject: Re: when mail full /tmp partition, system cracked Message-ID: <20010906152832.A44174@nomad.lets.net> In-Reply-To: <20010906104547.C56598@ns1.via-net-works.net.ar>; from fschapachnik@vianetworks.com.ar on Thu, Sep 06, 2001 at 10:45:47AM -0300 References: <015701c136d5$91352e00$9201a8c0@home.net> <20010906104547.C56598@ns1.via-net-works.net.ar>
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On Thu, Sep 06, 2001 at 10:45:47AM -0300, Fernando Schapachnik wrote: > En un mensaje anterior, edwin chan escribió: > > we found the messages in log: > > > > Sep 5 21:00:33 www /kernel: swap_pager: out of swap space > > Sep 5 21:00:33 www /kernel: swap_pager_getswapspace: failed > > What might have happened is that a the great amount of email forked a > great amount of processes which in turn ate all available memory and > swap. Your machine ran out of swap. Either increase it (look at the > FAQ & handbook for instructions) or add more memory. Or impose > resource limits (can do it via login.conf and/or sendmail.cf > -MaxDaemonChildren, RefuseLA, etc.-). What is supposed to happen is the largest process is supposed to be killed if virtual memory is exhausted. There is a bug in 4.3-RELEASE that prevents this from happening. The kernel hangs before any processes get killed. It has fixed in STABLE. -steve To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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