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Re: process substitution fd lifetime race condition
From: |
Chet Ramey |
Subject: |
Re: process substitution fd lifetime race condition |
Date: |
Mon, 20 Apr 2020 17:58:26 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 |
On 4/20/20 5:56 PM, Jason A. Donenfeld wrote:
> On Mon, Apr 20, 2020 at 3:49 PM Chet Ramey <chet.ramey@case.edu> wrote:
>>
>> On 4/20/20 5:01 PM, Jason A. Donenfeld wrote:
>>> On 4/20/20, Chet Ramey <chet.ramey@case.edu> wrote:
>>>> On 4/20/20 1:15 AM, Jason A. Donenfeld wrote:
>>>>> Hi,
>>>>>
>>>>> I've uncovered a very unusual race condition when using process
>>>>> substitution and developed as minimal a reproducer as I could create:
>>>>
>>>> What version of bash are you using?
>>>>
>>>
>>> 5.0.016
>>
>> See if the patch in this message helps things. I'm skeptical, but give it
>> a try.
>>
>> https://lists.gnu.org/archive/html/bug-bash/2020-04/msg00018.html
>
> Actually, it seems to work indeed... So far I can't repro with that.
OK, good. It was either that or closing the fd after reaping the child
process -- I couldn't tell 100% from the system call trace.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
- process substitution fd lifetime race condition, Jason A. Donenfeld, 2020/04/20
- Re: process substitution fd lifetime race condition, Chet Ramey, 2020/04/20
- Re: process substitution fd lifetime race condition, Jason A. Donenfeld, 2020/04/20
- Re: process substitution fd lifetime race condition, Chet Ramey, 2020/04/20
- Re: process substitution fd lifetime race condition, Jason A. Donenfeld, 2020/04/20
- Re: process substitution fd lifetime race condition,
Chet Ramey <=
- Re: process substitution fd lifetime race condition, Jason A. Donenfeld, 2020/04/20
- Re: process substitution fd lifetime race condition, Chet Ramey, 2020/04/20
- Re: process substitution fd lifetime race condition, Jason A. Donenfeld, 2020/04/21
- Re: process substitution fd lifetime race condition, Chet Ramey, 2020/04/21