Date: Wed, 28 Aug 1996 11:00:11 -0400 From: dennis@etinc.com (Dennis) To: Toshihiro Kanda <candy@fct.kgc.co.jp> Cc: hackers@freebsd.org Subject: Re: mountd(8) bug? Message-ID: <199608281500.LAA12238@etinc.com>
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> Hello, hackers. I found that mountd(8) dumpes core by certain
>(bogus) exports file. For example:
>
>| $ uname -srm
>| FreeBSD 2.1.5-RELEASE i386
>
>| $ cat /tmp/bogus-exoprts
>| /cdrom -network 192.168.1 192.168.8
>
>| $ /sbin/mountd -d /tmp/bogus-exports
>| Getting export list.
>| Got line /cdrom -network 192.168.1 192.168.8
>| Making new ep fs=0x400,0x1
>| doing opt -network 192.168.1 192.168.8
>| Segmentation fault (core dumped)
>
> I hope the following patch will fix this problem. New mountd now
>shows:
>
>| $ /usr/src/sbin/mountd/obj/mountd -d /tmp/bogus-export
>| Getting export list.
>| Got line /cdrom -network 192.168.1 192.168.8
>| Making new ep fs=0x400,0x1
>| doing opt -network 192.168.1 192.168.8
>| got host 192.168.8
>| Getting mount list.
>| Here we go.
>
>And syslogd(8) logs:
>| Aug 28 19:22:19 xxx mountd[723]: Bad exports list line /cdrom -network
192.168.1 192.168.8
>
> Is this correct?
>
>candy@fct.kgc.co.jp (Toshihiro Kanda)
>
>----------8<----------8<----------8<----------8<----------
>*** mountd.c.orig Thu Jan 11 09:12:45 1996
>--- mountd.c Wed Aug 28 18:15:00 1996
>***************
>*** 1346,1352 ****
> */
> checkgrp = tgrp;
> while (checkgrp) {
>! if (checkgrp->gr_ptr.gt_hostent != NULL &&
> !strcmp(checkgrp->gr_ptr.gt_hostent->h_name,
hp->h_name)) {
> grp->gr_type = GT_IGNORE;
> return(0);
>--- 1346,1353 ----
> */
> checkgrp = tgrp;
> while (checkgrp) {
>! if (checkgrp->gr_type == GT_HOST &&
>! checkgrp->gr_ptr.gt_hostent != NULL &&
> !strcmp(checkgrp->gr_ptr.gt_hostent->h_name,
hp->h_name)) {
> grp->gr_type = GT_IGNORE;
> return(0);
>----------8<----------8<----------8<----------8<----------
>
If you really feel ambitious....the "bug" that causes mountd to hang on boot
for a long
period of time when an export entry is not reachable is realllllllllly
annoying also.
Dennis
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