samba-tng: Reproducible, incomprehensible segfaults
Luke Kenneth Casson Leighton
lkcl at samba.org
Wed Feb 16 05:58:09 GMT 2000
steve, how does memset(p16, 0, 16) work instead of memset(p16, '\0', 16)?
On Wed, 16 Feb 2000, Steve Langasek wrote:
> On Wed, 16 Feb 2000, Luke Kenneth Casson Leighton wrote:
>
> > we've had compile-problems (well, i have) related to smbencrypt.c and a
> > couple of other files, before.
>
> > no reports or occurrences for over two years, though.
>
> > i suggest you try compiling without -O2, with -g, with neither etc.
>
> > also, a pain-in-the-neck process that i had to use to narrow down compiler
> > problems before (lattice c compiler for the atari st!) was to do a binary
> > search, removing functions.
>
> > in this case, you'd have to move them to... smbencrypt1.c otherwise you'd
> > not get a link.
>
> Well, seeing no other solution, I pulled apart the source file, and tracked
> the problem down to the memset calls in lm_owf_gen and lm_owf_genW. Replacing
> memset() with bzero() fixes the problem. I have /no/ idea why--but I've
> attached a patch which Works For Me<tm>, and which ought to work for others
> as well.
>
> Steve Langasek
> postmodern programmer
>
<a href="mailto:lkcl at samba.org" > Luke Kenneth Casson Leighton </a>
<a href="http://cb1.com/~lkcl" > Samba and Network Development </a>
<a href="http://samba.org" > Samba Web site </a>
<a href="http://www.iss.net" > Internet Security Systems, Inc. </a>
<a href="http://mcp.com" > Macmillan Technical Publishing </a>
ISBN1578701503 DCE/RPC over SMB: Samba and Windows NT Domain Internals
-------------- next part --------------
Index: libsmb/smbencrypt.c
===================================================================
RCS file: /cvsroot/samba/source/libsmb/smbencrypt.c,v
retrieving revision 1.46.2.15
diff -u -w -r1.46.2.15 smbencrypt.c
--- smbencrypt.c 2000/02/13 05:57:56 1.46.2.15
+++ smbencrypt.c 2000/02/16 05:38:00
@@ -139,7 +139,7 @@
{
char pwrd[15];
- memset(pwrd, '\0', 15);
+ bzero(pwrd, 15);
if (pwd != NULL)
{
unistr2_to_ascii(pwrd, pwd, sizeof(pwrd) - 1);
@@ -151,7 +151,7 @@
/* Calculate the SMB (lanman) hash functions of the password */
- memset(p16, '\0', 16);
+ bzero(p16, 16);
E_P16((uchar *) pwrd, (uchar *) p16);
#ifdef DEBUG_PASSWORD
@@ -168,7 +168,7 @@
{
char pwrd[15];
- memset(pwrd, '\0', 15);
+ bzero(pwrd, 15);
if (pwd != NULL)
{
safe_strcpy(pwrd, pwd, sizeof(pwrd) - 1);
@@ -180,7 +180,7 @@
/* Calculate the SMB (lanman) hash functions of the password */
- memset(p16, '\0', 16);
+ bzero(p16, 16);
E_P16((uchar *) pwrd, (uchar *) p16);
#ifdef DEBUG_PASSWORD
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