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Re: [PATCH] fix read uninitialized at exec_builtin:orig_job_control

From: Chet Ramey
Subject: Re: [PATCH] fix read uninitialized at exec_builtin:orig_job_control
Date: Wed, 17 Aug 2022 09:45:12 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.1.2

On 8/16/22 1:58 PM, Xiami wrote:
The following script will likely failed to echo "Failed to exec" in 
non-interactive mode:
     #ls -l /proc/$$/fd
     shopt -s execfail
     exec notexistexecutable
     echo >&2 "Failed to exec"
     #ls -l /proc/$$/fd

exec_builtin will `goto failed_exec` after `search_for_command(args[0], 1)`
returns NULL, before `orig_job_control = job_control`, causing read
uninitialized orig_job_control in failed_exec code.

Thanks for the report.

``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/

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