Re: (ITS#3388) Seg11 when used with pam_ldap under dtlogin

[jdb@force10networks.com]

that sounds pretty horrible.

i haven't installed the newer gcc yet, we'll see how it performs. my 
guess was that it had &new[0] in one register and &ber[0] in another 
register, and picked the wrong one.  i think the offset of ber_sos into 
new is about where ber->ber_end would be.

okay, i admit it, that doesn't seem likely, but i'm crossing my 
fingers...  i can't fix Solaris' brokenness.  I can however replace 
GCC.

Again, thanks for your help.

- joel



On Nov 10, 2004, at 5:41 PM, Howard Chu wrote:

> Joel Boutros wrote:
>
>> uhh, weird, ber->ber_end is 0x30.  so it doesn't go to realloc().  
>> this happens somewhere around a bunch of unrelated code.  the 
>> assignment of new->sos_tag = tag; clobbers ber->ber_end, even though 
>> everything looks right when i print variables as far as addresses and 
>> whatnot.
>>
>> okay, i suspect gcc maybe (3.3.1).  or, it's something to look 
>> at/try, at least.  sorry for wasting your time....
>
> Solaris 8 is known to have bugs in malloc at particular patchlevels. 
> This is complicated by the fact that their Openwin/DT libraries 
> include their own private malloc functions, and the dynamic linker 
> makes it ambiguous as to which malloc a particular routine will 
> invoke. I don't remember the specifics, but we at Symas have run into 
> this problem numerous times. I think it may also be related to some of 
> the libraries being compiled -D_REENTRANT and others not. Certainly we 
> have seen malloc crashes in /usr/dt/lib. This is one of the problems 
> of the pam/nss architecture; the system only lets you load a single 
> module for all situations, but a REENTRANT /threaded object won't work 
> correctly in a non-threaded application, and vice versa.
>
>>>
>>> I suggest you single-step through ber_realloc and see what is really 
>>> happening.
>>
> -- 
>  -- Howard Chu
>  Chief Architect, Symas Corp.       Director, Highland Sun
>  http://www.symas.com               http://highlandsun.com/hyc
>  Symas: Premier OpenSource Development and Support
>