CVS commit: src/sbin/resize_ffs

["Stephen Borrill" <sborrill%netbsd.org@localhost>]

Module Name:    src
Committed By:   sborrill
Date:           Thu Sep 28 17:07:20 UTC 2017

Modified Files:
        src/sbin/resize_ffs: resize_ffs.c

Log Message:
Fix the most obvious integer overflow errors which can lead to superblock
corruption. Thanks to riastradh@

For example:

# df /data
Filesystem    1K-blocks       Used      Avail %Cap Mounted on
/dev/ccd0d   -19974939099004 -19982708701532 -737868756431824584   0% /data

# dumpfs -s /dev/rccd0d
file system: /dev/rccd0d
format  FFSv2
endian  little-endian
location 65536  (-b 128)
magic   19540119        time    Thu Sep 28 13:18:10 2017
superblock location     65536   id      [ 595fa4a5 3363fe37 ]
cylgrp  dynamic inodes  FFSv2   sblock  FFSv2   fslevel 5
nbfree  242773148       ndir    211185  nifree  650798800       nffree
215448
ncg     13933   size    2647654400      blocks  -4993734774751
bsize   32768   shift   15      mask    0xffff8000
fsize   4096    shift   12      mask    0xfffff000
frag    8       shift   3       fsbtodb 3
bpg     23754   fpg     190032  ipg     46848
minfree 5%      optim   time    maxcontig 2     maxbpg  4096
symlinklen 120  contigsumsize 2
maxfilesize 0x000800800805ffff
nindir  4096    inopb   128
avgfilesize 16384       avgfpdir 64
sblkno  24      cblkno  32      iblkno  40      dblkno  2968
sbsize  4096    cgsize  32768
csaddr  35792   cssize  225280
cgrotor 0       fmod    0       ronly   0       clean   0x01
wapbl version 0x1       location 2      flags 0x0
wapbl loc0 6354693888   loc1 131072     loc2 512        loc3 3
flags   none
fsmnt   /data
volname         swuid   0


To generate a diff of this commit:
cvs rdiff -u -r1.47 -r1.48 src/sbin/resize_ffs/resize_ffs.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.