Re: bash encountered a coredump issue with stepping on memory

[Chet Ramey]

On 12/6/23 3:47 AM, wang yuhang wrote:

> The initialize_shell_variables function is processing env. When the for 
> loop reaches env[16], glibc needs to use the main_arena.top variable. 
> However, the value in the address pointed to by the top variable is 
> overwritten by env[15], causing a glibc exception and resulting in a coredump

`env' is the environment bash gets at startup.

> We are still continuously find a way to reliably reproduce it, but this may 
> take some time. We hope you could take a look at the above information and 
> provide useful suggestions

Maybe build a version of bash with address sanitizer enabled and see if you
can trigger the problem using that version. The asan output should provide
more information.

--
``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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