RE: Bash crash

[Kai Wang X]

Hi Piotr,

I am sorry I am not clear for your first question.

FYI:
bash-4.3$ /bin/sh --version
GNU bash, version 4.3.30(1)-release (aarch64-mvista-linux-gnu)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
bash-4.3$ ls -l /bin.sh
ls: cannot access /bin.sh: No such file or directory
bash-4.3$ ls -l /bin/sh
lrwxrwxrwx 1 root root 9 Oct 23  2015 /bin/sh -> /bin/bash
bash-4.3$ ^C

-----Original Message-----
From: Piotr Grzybowski [mailto:narsil.pl@gmail.com] 
Sent: 2015年10月23日 15:34
To: Kai Wang X
Cc: chet.ramey@case.edu; Aharon Robbins; bug-bash@gnu.org
Subject: Re: Bash crash

 I would run the same script under gdb (in the similar manner as you examine 
the core in the case of dead.bashbug4.3.3), what happens when you do that?
 also, could you please (just for me) run:

 /bin/sh --version

sincerely,
pg


On Fri, Oct 23, 2015 at 7:49 AM, Kai Wang X <kai.x.wang@ericsson.com> wrote:
> Hi Piotr,
>
> Actually when process com is not needed, "com.sh" will not be launched 
> instead of commenting one line.
> I have never tried that. From the coredump log of 4.3, seems it crashed 
> before line 187. (crashed at 114).
> Thank you.
>
> -----Original Message-----
> From: Piotr Grzybowski [mailto:narsil.pl@gmail.com]
> Sent: 2015年10月23日 1:08
> To: Kai Wang X
> Cc: chet.ramey@case.edu; Aharon Robbins; bug-bash@gnu.org
> Subject: Re: Bash crash
>
>  do I understand correctly, that when you comment the line 187 the issue is 
> not existent?
>
> cheers,
> pg
>
>
> On Thu, Oct 22, 2015 at 4:39 AM, Kai Wang X <kai.x.wang@ericsson.com> wrote:
>> Hi all,
>>
>> Thank you all!
>>
>> The issue happens since we added a new process launched by a bash script. 
>> Before that, no "sbrk issues" were found and hundreds of process including 
>> scripts were running in my equipment. So it is hard for me to believe that 
>> there are RAM or sbrk issues already exist on my system. Also bash is used 
>> by more users world-wide, so ... I am being confused...
>>
>> The process named "com" launched by script command "com.sh start". Pls refer 
>> to the attached files. It looks easy, doesn't it?
>>
>> @Piotr,
>>
>> Sure. Every equipment has the possibility of the issue.
>>
>>
>> -----Original Message-----
>> From: Piotr Grzybowski [mailto:narsil.pl@gmail.com]
>> Sent: 2015年10月21日 19:27
>> To: Kai Wang X
>> Subject: Re: Bash crash
>>
>> hello,
>>
>>  does the problem also appear on other pieces of equipment? I mean, 
>> different phisical machine, of the same sort?
>>
>> pg
>>
>>
>>
>>
>>
>> On Wed, Oct 21, 2015 at 4:29 AM, Kai Wang X <kai.x.wang@ericsson.com> wrote:
>>> Hi Chet,
>>>
>>> Thank you for your response.
>>>
>>> But it does not make sense since sbrk failure will be checked:
>>>
>>>   mp = (union mhead *) sbrk (sbrk_amt);
>>>
>>>   /* Totally out of memory. */
>>>   if ((long)mp == -1)
>>>     goto morecore_done;
>>>
>>> The script just runs when my equipment boots up. Also it is hard to 
>>> reproduce in my environment. Only every few times of my equipment booting 
>>> up, it generates a coredump file.
>>>
>>> -----Original Message-----
>>> From: Chet Ramey [mailto:chet.ramey@case.edu]
>>> Sent: 2015年10月20日 21:31
>>> To: Kai Wang X; bug-bash@gnu.org
>>> Cc: chet.ramey@case.edu
>>> Subject: Re: Bash crash
>>>
>>> On 10/19/15 10:47 PM, Kai Wang X wrote:
>>>> Dear,
>>>>
>>>>
>>>>
>>>> We have two products which are using bash 4.2 and 4.3 separately.
>>>> They all meet bash crash issue. Please refer to the attached files.
>>>>
>>>> It is hard for me to understand the bash source code to find the 
>>>> root cause out.
>>>
>>> It really looks like sbrk(2) is failing here, but since I don't have any 
>>> way to reproduce it, that may not be it.  This could be caused by your 
>>> process exceeding its memory resource limit or your system's swap space 
>>> being exhausted.
>>>
>>> Chet
>>>
>>> --
>>> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>>>                  ``Ars longa, vita brevis'' - Hippocrates
>>> Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/