Date: Thu, 27 Dec 2001 15:00:06 -0600 From: Alfred Perlstein <bright@mu.org> To: Michael Scheidell <scheidell@secnap.net> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: userland program panics freebsd 4.3 Message-ID: <20011227150006.L55891@elvis.mu.org> In-Reply-To: <017601c18f17$a9ce64a0$05032240@MIKELT>; from scheidell@secnap.net on Thu, Dec 27, 2001 at 03:47:13PM -0500 References: <20011221174007.D551C38CC@overcee.netplex.com.au> <200112211751.fBLHpcr02576@scanner.secnap.net> <20011221181804.A40540@walton.maths.tcd.ie> <015701c18f14$a1b90660$05032240@MIKELT> <20011227143138.I55891@elvis.mu.org> <017601c18f17$a9ce64a0$05032240@MIKELT>
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* Michael Scheidell <scheidell@secnap.net> [011227 14:48] wrote:
>
> same place as before:
>
> 0 fstatfs (p=0xce1bd260, uap=0xce216f80) at ../../kern/vfs_syscalls.c:684
> 684 error = VFS_STATFS(mp, sp, p);
> 680 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
> 681 return (error);
> 682 mp = ((struct vnode *)fp->f_data)->v_mount;
> 683 sp = &mp->mnt_stat;
> 684 error = VFS_STATFS(mp, sp, p);
> 685 if (error)
> 686 return (error);
> 687 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
> 688 if (suser_xxx(p->p_ucred, 0, 0)) {
> (kgdb) print mp
> $1 = (struct mount *) 0x28121604
> (kgdb) print sp
> $2 = (struct statfs *) 0x7
> (kgdb) print p
> $3 = (struct proc *) 0x8000
> (kgdb) print sp->f_flags
> Cannot access memory at address 0x37.
Ah, ok, I did see this before.
Can you print:
*mp, *sp, *p, *((struct vnode *)fp->f_data)
Can you tell me what filesystem this is over? Do you have
any special tunables set in your kernel? Anything you can
divulge about how this program operates?
--
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.'
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