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Re: [PATCH] Fix overflow in jobs


From: Natanael Copa
Subject: Re: [PATCH] Fix overflow in jobs
Date: Wed, 7 Feb 2018 19:51:14 +0100

Hi,

On Fri, 8 Dec 2017 08:04:00 -0500
Chet Ramey <address@hidden> wrote:

> On 12/7/17 5:36 PM, Natanael Copa wrote:
> > This fixes an issue with bash hanging if user process rlimit is too
> > high.  
> 
> Thanks for the report.
> 

Unfortunately, the proposed patch does not fix the case for 32 bit
architectures.

The bug was introduced with commit a0c0a00f[1].

I think the proper fix may be re-enable the js.c_childmax capping. What
do you think?

diff --git a/jobs.c b/jobs.c
index cef3c79..bf99266 100644
--- a/jobs.c
+++ b/jobs.c
@@ -4166,10 +4166,8 @@ initialize_job_control (force)
   if (js.c_childmax < 0)
     js.c_childmax = DEFAULT_CHILD_MAX;
 
-#if 0
   if (js.c_childmax > MAX_CHILD_MAX)
     js.c_childmax = MAX_CHILD_MAX;
-#endif
 
   return job_control;
 }
@@ -4547,10 +4545,8 @@ mark_dead_jobs_as_notified (force)
   if (js.c_childmax < 0)
     js.c_childmax = DEFAULT_CHILD_MAX;
 
-#if 0
   if (js.c_childmax > MAX_CHILD_MAX)
     js.c_childmax = MAX_CHILD_MAX;
-#endif
 
   /* Don't do anything if the number of dead processes is less than CHILD_MAX
      and we're not forcing a cleanup. */



[1]: 
http://git.savannah.gnu.org/cgit/bash.git/commit/?id=a0c0a00fc419b7bc08202a79134fcd5bc0427071



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