Article View: comp.bugs.4bsd
Article #1413Fsck dumps core
From: Diomidis Spinellis
Date: Tue, 06 Feb 1990 12:30
Date: Tue, 06 Feb 1990 12:30
42 lines
1770 bytes
1770 bytes
Index: etc/fsck/pass1.c 4.3BSD (including Tahoe)
Description:
Fsck dumps core. An integer variable, (j in function pass1)
can exceed 2^31. When j is used to index dp->di_db[] it gives
a negative offset which results in an incorrect address.
Repeat-By:
Some probably rare combination of disk configuration, paritioning
and disk inconsistencies.
Fix:
Change "etc/fsck/pass1.c" by applying the following patch. A
thorough general cleanup to remove type inconsistencies between
daddr_t, long and unsigned int is needed, but it looks like a lot
of work.
*** pass1.c.orig Tue Feb 6 11:42:59 1990
--- pass1.c Tue Feb 6 11:41:57 1990
***************
*** 25,31 ****
pass1()
{
! register int c, i, j;
register DINODE *dp;
struct zlncnt *zlnp;
int ndb, cgd;
--- 25,31 ----
pass1()
{
! register unsigned int c, i, j;
register DINODE *dp;
struct zlncnt *zlnp;
int ndb, cgd;
--
Diomidis Spinellis Internet: dds@cc.ic.ac.uk
Department of Computing BITNET: dds@cc.ic.ac.uk
Imperial College UUCP: ...!cernvax!cc.imperial.ac.uk!dds
London SW7 2BZ JANET: dds@uk.ac.ic.cc
Technical Details
Message-ID:
<1552@gould.doc.ic.ac.uk>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!eru!luth!sunic!mcsun!ukc!icdoc!doc.ic.ac.uk!zmact61Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!eru!luth!sunic!mcsun!ukc!icdoc!doc.ic.ac.uk!zmact61 From: zmact61@doc.ic.ac.uk (Diomidis Spinellis) Newsgroups: comp.bugs.4bsd Subject: Fsck dumps core Keywords: fsck core dump Message-ID: <1552@gould.doc.ic.ac.uk> Date: 6 Feb 90 12:30:27 GMT Sender: news@doc.ic.ac.uk Reply-To: dds@cc.ic.ac.uk (Diomidis Spinellis) Organization: Department of Computing, Imperial College, London, UK Lines: 42