mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-21 08:24:10 +01:00
333ec30d71
<QUOTE>
Overflow of cg_niblk causes spurious "SUMMARY INFORMATION BAD" warnings
prompts in fsck_ffs. cg_niblk has type int16_t, but it is (ab)used
to hold the number of inodes per group (it has nothing to do with the
number of inode blocks in the cg as claimed in ffs/fs.h), and there
can be lots of inodes per group. E.g.,
newfs -i 8192 -b 16384 -f 16384 -c 255 ...
gives 0xA900 inodes/group. Assignment of this to cg_niblk gives
-0x5700. This is mostly harmless (ufs/ffs doesn't use cg_niblk, and
bug-for-bug compatible overflow occurs in newfs), but in
fsck_ffs/pass5.c, negative values of cg_niblk limit cg_irotor to 0
and the summary info appears to be bad.
</QUOTE>
Submitted by: Bruce Evans <bde@zeta.org.au>
Obtained from: Kirk McKusick <mckusick@mckusick.com>
432 lines
12 KiB
C
432 lines
12 KiB
C
/*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static const char sccsid[] = "@(#)pass5.c 8.9 (Berkeley) 4/28/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <string.h>
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#include "fsck.h"
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void
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pass5()
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{
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int c, blk, frags, basesize, sumsize, mapsize, savednrpos = 0;
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int inomapsize, blkmapsize, astart, aend, ustart, uend;
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struct fs *fs = &sblock;
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struct cg *cg = &cgrp;
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ufs_daddr_t dbase, dmax;
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ufs_daddr_t d;
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long i, j, k, l, m, n;
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struct csum *cs;
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struct csum cstotal;
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struct inodesc idesc[3];
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char buf[MAXBSIZE];
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register struct cg *newcg = (struct cg *)buf;
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struct ocg *ocg = (struct ocg *)buf;
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inoinfo(WINO)->ino_state = USTATE;
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memset(newcg, 0, (size_t)fs->fs_cgsize);
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/*
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* Note: cg_niblk is 16 bits and may overflow, so it must never
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* be used except for comparing with the old value.
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*/
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newcg->cg_niblk = fs->fs_ipg;
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if (cvtlevel >= 3) {
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if (fs->fs_maxcontig < 2 && fs->fs_contigsumsize > 0) {
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if (preen)
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pwarn("DELETING CLUSTERING MAPS\n");
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if (preen || reply("DELETE CLUSTERING MAPS")) {
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fs->fs_contigsumsize = 0;
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doinglevel1 = 1;
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sbdirty();
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}
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}
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if (fs->fs_maxcontig > 1) {
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char *doit = 0;
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if (fs->fs_contigsumsize < 1) {
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doit = "CREAT";
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} else if (fs->fs_contigsumsize < fs->fs_maxcontig &&
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fs->fs_contigsumsize < FS_MAXCONTIG) {
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doit = "EXPAND";
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}
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if (doit) {
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i = fs->fs_contigsumsize;
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fs->fs_contigsumsize =
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MIN(fs->fs_maxcontig, FS_MAXCONTIG);
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if (CGSIZE(fs) > fs->fs_bsize) {
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pwarn("CANNOT %s CLUSTER MAPS\n", doit);
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fs->fs_contigsumsize = i;
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} else if (preen ||
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reply("CREATE CLUSTER MAPS")) {
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if (preen)
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pwarn("%sING CLUSTER MAPS\n",
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doit);
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fs->fs_cgsize =
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fragroundup(fs, CGSIZE(fs));
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doinglevel1 = 1;
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sbdirty();
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}
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}
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}
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}
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switch ((int)fs->fs_postblformat) {
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case FS_42POSTBLFMT:
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basesize = (char *)(&ocg->cg_btot[0]) -
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(char *)(&ocg->cg_firstfield);
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sumsize = &ocg->cg_iused[0] - (u_int8_t *)(&ocg->cg_btot[0]);
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mapsize = &ocg->cg_free[howmany(fs->fs_fpg, NBBY)] -
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(u_char *)&ocg->cg_iused[0];
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blkmapsize = howmany(fs->fs_fpg, NBBY);
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inomapsize = &ocg->cg_free[0] - (u_char *)&ocg->cg_iused[0];
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ocg->cg_magic = CG_MAGIC;
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savednrpos = fs->fs_nrpos;
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fs->fs_nrpos = 8;
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break;
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case FS_DYNAMICPOSTBLFMT:
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newcg->cg_btotoff =
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&newcg->cg_space[0] - (u_char *)(&newcg->cg_firstfield);
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newcg->cg_boff =
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newcg->cg_btotoff + fs->fs_cpg * sizeof(int32_t);
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newcg->cg_iusedoff = newcg->cg_boff +
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fs->fs_cpg * fs->fs_nrpos * sizeof(u_int16_t);
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newcg->cg_freeoff =
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newcg->cg_iusedoff + howmany(fs->fs_ipg, NBBY);
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inomapsize = newcg->cg_freeoff - newcg->cg_iusedoff;
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newcg->cg_nextfreeoff = newcg->cg_freeoff +
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howmany(fs->fs_cpg * fs->fs_spc / NSPF(fs), NBBY);
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blkmapsize = newcg->cg_nextfreeoff - newcg->cg_freeoff;
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if (fs->fs_contigsumsize > 0) {
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newcg->cg_clustersumoff = newcg->cg_nextfreeoff -
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sizeof(u_int32_t);
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newcg->cg_clustersumoff =
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roundup(newcg->cg_clustersumoff, sizeof(u_int32_t));
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newcg->cg_clusteroff = newcg->cg_clustersumoff +
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(fs->fs_contigsumsize + 1) * sizeof(u_int32_t);
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newcg->cg_nextfreeoff = newcg->cg_clusteroff +
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howmany(fs->fs_cpg * fs->fs_spc / NSPB(fs), NBBY);
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}
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newcg->cg_magic = CG_MAGIC;
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basesize = &newcg->cg_space[0] -
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(u_char *)(&newcg->cg_firstfield);
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sumsize = newcg->cg_iusedoff - newcg->cg_btotoff;
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mapsize = newcg->cg_nextfreeoff - newcg->cg_iusedoff;
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break;
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default:
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inomapsize = blkmapsize = sumsize = 0; /* keep lint happy */
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errx(EEXIT, "UNKNOWN ROTATIONAL TABLE FORMAT %d",
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fs->fs_postblformat);
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}
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memset(&idesc[0], 0, sizeof idesc);
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for (i = 0; i < 3; i++) {
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idesc[i].id_type = ADDR;
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if (doinglevel2)
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idesc[i].id_fix = FIX;
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}
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memset(&cstotal, 0, sizeof(struct csum));
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j = blknum(fs, fs->fs_size + fs->fs_frag - 1);
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for (i = fs->fs_size; i < j; i++)
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setbmap(i);
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for (c = 0; c < fs->fs_ncg; c++) {
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getblk(&cgblk, cgtod(fs, c), fs->fs_cgsize);
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if (!cg_chkmagic(cg))
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pfatal("CG %d: BAD MAGIC NUMBER\n", c);
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dbase = cgbase(fs, c);
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dmax = dbase + fs->fs_fpg;
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if (dmax > fs->fs_size)
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dmax = fs->fs_size;
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newcg->cg_time = cg->cg_time;
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newcg->cg_cgx = c;
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if (c == fs->fs_ncg - 1)
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newcg->cg_ncyl = fs->fs_ncyl % fs->fs_cpg;
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else
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newcg->cg_ncyl = fs->fs_cpg;
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newcg->cg_ndblk = dmax - dbase;
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if (fs->fs_contigsumsize > 0)
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newcg->cg_nclusterblks = newcg->cg_ndblk / fs->fs_frag;
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newcg->cg_cs.cs_ndir = 0;
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newcg->cg_cs.cs_nffree = 0;
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newcg->cg_cs.cs_nbfree = 0;
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newcg->cg_cs.cs_nifree = fs->fs_ipg;
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if (cg->cg_rotor < newcg->cg_ndblk)
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newcg->cg_rotor = cg->cg_rotor;
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else
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newcg->cg_rotor = 0;
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if (cg->cg_frotor < newcg->cg_ndblk)
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newcg->cg_frotor = cg->cg_frotor;
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else
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newcg->cg_frotor = 0;
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if (cg->cg_irotor < fs->fs_ipg)
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newcg->cg_irotor = cg->cg_irotor;
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else
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newcg->cg_irotor = 0;
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memset(&newcg->cg_frsum[0], 0, sizeof newcg->cg_frsum);
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memset(&cg_blktot(newcg)[0], 0,
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(size_t)(sumsize + mapsize));
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if (fs->fs_postblformat == FS_42POSTBLFMT)
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ocg->cg_magic = CG_MAGIC;
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j = fs->fs_ipg * c;
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for (i = 0; i < inostathead[c].il_numalloced; j++, i++) {
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switch (inoinfo(j)->ino_state) {
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case USTATE:
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break;
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case DSTATE:
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case DCLEAR:
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case DFOUND:
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newcg->cg_cs.cs_ndir++;
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/* fall through */
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case FSTATE:
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case FCLEAR:
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newcg->cg_cs.cs_nifree--;
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setbit(cg_inosused(newcg), i);
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break;
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default:
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if (j < ROOTINO)
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break;
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errx(EEXIT, "BAD STATE %d FOR INODE I=%ld",
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inoinfo(j)->ino_state, j);
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}
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}
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if (c == 0)
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for (i = 0; i < ROOTINO; i++) {
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setbit(cg_inosused(newcg), i);
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newcg->cg_cs.cs_nifree--;
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}
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for (i = 0, d = dbase;
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d < dmax;
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d += fs->fs_frag, i += fs->fs_frag) {
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frags = 0;
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for (j = 0; j < fs->fs_frag; j++) {
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if (testbmap(d + j))
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continue;
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setbit(cg_blksfree(newcg), i + j);
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frags++;
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}
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if (frags == fs->fs_frag) {
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newcg->cg_cs.cs_nbfree++;
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j = cbtocylno(fs, i);
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cg_blktot(newcg)[j]++;
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cg_blks(fs, newcg, j)[cbtorpos(fs, i)]++;
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if (fs->fs_contigsumsize > 0)
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setbit(cg_clustersfree(newcg),
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i / fs->fs_frag);
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} else if (frags > 0) {
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newcg->cg_cs.cs_nffree += frags;
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blk = blkmap(fs, cg_blksfree(newcg), i);
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ffs_fragacct(fs, blk, newcg->cg_frsum, 1);
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}
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}
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if (fs->fs_contigsumsize > 0) {
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int32_t *sump = cg_clustersum(newcg);
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u_char *mapp = cg_clustersfree(newcg);
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int map = *mapp++;
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int bit = 1;
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int run = 0;
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for (i = 0; i < newcg->cg_nclusterblks; i++) {
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if ((map & bit) != 0) {
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run++;
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} else if (run != 0) {
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if (run > fs->fs_contigsumsize)
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run = fs->fs_contigsumsize;
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sump[run]++;
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run = 0;
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}
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if ((i & (NBBY - 1)) != (NBBY - 1)) {
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bit <<= 1;
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} else {
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map = *mapp++;
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bit = 1;
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}
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}
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if (run != 0) {
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if (run > fs->fs_contigsumsize)
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run = fs->fs_contigsumsize;
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sump[run]++;
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}
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}
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cstotal.cs_nffree += newcg->cg_cs.cs_nffree;
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cstotal.cs_nbfree += newcg->cg_cs.cs_nbfree;
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cstotal.cs_nifree += newcg->cg_cs.cs_nifree;
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cstotal.cs_ndir += newcg->cg_cs.cs_ndir;
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cs = &fs->fs_cs(fs, c);
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if (memcmp(&newcg->cg_cs, cs, sizeof *cs) != 0 &&
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dofix(&idesc[0], "FREE BLK COUNT(S) WRONG IN SUPERBLK")) {
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memmove(cs, &newcg->cg_cs, sizeof *cs);
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sbdirty();
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}
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if (doinglevel1) {
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memmove(cg, newcg, (size_t)fs->fs_cgsize);
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cgdirty();
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continue;
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}
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if ((memcmp(newcg, cg, basesize) != 0 ||
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memcmp(&cg_blktot(newcg)[0],
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&cg_blktot(cg)[0], sumsize) != 0) &&
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dofix(&idesc[2], "SUMMARY INFORMATION BAD")) {
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memmove(cg, newcg, (size_t)basesize);
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memmove(&cg_blktot(cg)[0],
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&cg_blktot(newcg)[0], (size_t)sumsize);
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cgdirty();
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}
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if (debug) {
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for (i = 0; i < inomapsize; i++) {
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j = cg_inosused(newcg)[i];
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k = cg_inosused(cg)[i];
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if (j == k)
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continue;
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for (m = 0, l = 1; m < NBBY; m++, l <<= 1) {
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if ((j & l) == (k & l))
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continue;
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n = c * fs->fs_ipg + i * NBBY + m;
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if ((j & l) != 0)
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pwarn("%s INODE %d MARKED %s\n",
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"ALLOCATED", n, "FREE");
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else
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pwarn("%s INODE %d MARKED %s\n",
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"UNALLOCATED", n, "USED");
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}
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}
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astart = ustart = -1;
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for (i = 0; i < blkmapsize; i++) {
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j = cg_blksfree(cg)[i];
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k = cg_blksfree(newcg)[i];
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if (j == k)
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continue;
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for (m = 0, l = 1; m < NBBY; m++, l <<= 1) {
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if ((j & l) == (k & l))
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continue;
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n = c * fs->fs_fpg + i * NBBY + m;
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if ((j & l) != 0) {
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if (astart == -1) {
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astart = aend = n;
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continue;
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}
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if (aend + 1 == n) {
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aend = n;
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continue;
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}
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pwarn("%s FRAGS %d-%d %s\n",
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"ALLOCATED", astart, aend,
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"MARKED FREE");
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astart = aend = n;
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} else {
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if (ustart == -1) {
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ustart = uend = n;
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continue;
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}
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if (uend + 1 == n) {
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uend = n;
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continue;
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}
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pwarn("%s FRAGS %d-%d %s\n",
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"UNALLOCATED", ustart, uend,
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"MARKED USED");
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ustart = uend = n;
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}
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}
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}
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if (astart != -1)
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pwarn("%s FRAGS %d-%d %s\n",
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"ALLOCATED", astart, aend,
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"MARKED FREE");
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if (ustart != -1)
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pwarn("%s FRAGS %d-%d %s\n",
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"UNALLOCATED", ustart, uend,
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"MARKED USED");
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}
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if (usedsoftdep) {
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for (i = 0; i < inomapsize; i++) {
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j = cg_inosused(newcg)[i];
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if ((cg_inosused(cg)[i] & j) == j)
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continue;
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for (k = 0; k < NBBY; k++) {
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if ((j & (1 << k)) == 0)
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continue;
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if (cg_inosused(cg)[i] & (1 << k))
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continue;
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pwarn("ALLOCATED INODE %d MARKED FREE\n",
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c * fs->fs_ipg + i * NBBY + k);
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}
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}
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for (i = 0; i < blkmapsize; i++) {
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j = cg_blksfree(cg)[i];
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if ((cg_blksfree(newcg)[i] & j) == j)
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continue;
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for (k = 0; k < NBBY; k++) {
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if ((j & (1 << k)) == 0)
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continue;
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if (cg_blksfree(newcg)[i] & (1 << k))
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continue;
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pwarn("ALLOCATED FRAG %d MARKED FREE\n",
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c * fs->fs_fpg + i * NBBY + k);
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}
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}
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}
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if (memcmp(cg_inosused(newcg), cg_inosused(cg), mapsize) != 0 &&
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dofix(&idesc[1], "BLK(S) MISSING IN BIT MAPS")) {
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memmove(cg_inosused(cg), cg_inosused(newcg),
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(size_t)mapsize);
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cgdirty();
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}
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}
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if (fs->fs_postblformat == FS_42POSTBLFMT)
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fs->fs_nrpos = savednrpos;
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if (memcmp(&cstotal, &fs->fs_cstotal, sizeof *cs) != 0
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&& dofix(&idesc[0], "FREE BLK COUNT(S) WRONG IN SUPERBLK")) {
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memmove(&fs->fs_cstotal, &cstotal, sizeof *cs);
|
|
fs->fs_ronly = 0;
|
|
fs->fs_fmod = 0;
|
|
sbdirty();
|
|
}
|
|
}
|