helpThe GNU Bourne-Again SHell - Support: sr #109524, Crash related to mkseq


sr #109524: Crash related to mkseq

Submitted by:  None
Submitted on:  Tue 10 Jul 2018 11:41:57 AM UTC  
Category:  None Priority:  5 - Normal
Severity:  3 - Normal Status:  Done
Privacy:  Public Assigned to:  None
Originator Email:  -email is unavailable- Open/Closed:  Open
Operating System:  GNU/Linux

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Fri 17 Aug 2018 01:32:26 PM UTC, comment #1: 

Thanks for the report. This is the result of integer overflow.

Chet Ramey <chet>
Project Administrator
Tue 10 Jul 2018 11:41:57 AM UTC, original submission:  

Dear all,
The following crash related to `mkseq` was found by a modified version of the kAFL fuzzer (
I have attached the binary and all related crashing inputs grouped by the last 5 call-stack functions and input, each with a back-trace and context (containing color).
To reproduce the crash issue, execute the binary of bash with the crashing input as script (./bash < <crashing_input>).

We can verify all issues for GNU bash, version 4.4.23(2) (x86_64-unknown-linux-gnu) (git commit 64447609994bfddeef1061948022c074093e9a9f).

Credits: Simon Wörner, Sergej Schumilo, Cornelius Aschermann (all of Ruhr-Universität Bochum)

Best regards,
Simon Wörner



(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #44532: added by None (1MiB - application/zip)


Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by None (Submitted the item)

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-08-17 chet StatusNone => Done
    2018-07-10 None Attached File- => Added, #44532

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