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From: Sami Kerola <kerolasa@iki.fi>
To: Diego Kreutz <kreutz@acm.org>
Cc: util-linux <util-linux@vger.kernel.org>
Subject: Re: [bug report] cal command segmentation fault
Date: Mon, 15 Feb 2021 15:55:43 +0000	[thread overview]
Message-ID: <CAG27Bk0AV-7VmDj89Cfw5N_aRxtOzC4Ua8BZ7QPtuHB4qtYD_w@mail.gmail.com> (raw)
In-Reply-To: <CADjQn4h=J-K=HdGc-WJHLeK4WfepRbjsTL3EWbwfwDwJxZosXw@mail.gmail.com>

On Mon, 15 Feb 2021 at 15:31, Diego Kreutz <kreutz@acm.org> wrote:
> I found a bug in the cal command. It is a segmentation fault for the
> following input.
>
> cal -d 20210516
> Segmentation fault: 11
>
> The segmentation fault happens with exactly 8 digits. However, there
> is something going wrong with more digits as well. With 9 or more
> digits, the command's output gets weird.
>
> I checked the bug in three systems (Debian 10, OS X, and Ubuntu Server 16.04).
>
> Linux NAME 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u2 (2019-08-08)
> x86_64 GNU/Linux
>
> Darwin NAME 19.6.0 Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05
> PST 2021; root:xnu-6153.141.16~1/RELEASE_X86_64 x86_64
>
> Linux NAME 4.4.0-116-generic #140-Ubuntu SMP Mon Feb 12 21:23:04 UTC
> 2018 x86_64 x86_64 x86_64 GNU/Linux
>
> Unfortunately, I don't have the time to go through the code and
> provide a detailed fix for the issue. However, I assume it should be
> fairly straightforward for the maintainers to find and fix this bug.

Hi Diego

I am almost certain you reached wrong mail-list. The util-linux cal(1)
does not have -d option,

$ cal -d 20210516
cal: invalid option -- 'd'
Try 'cal --help' for more information.

$ cal --version
cal from util-linux 2.36.2

I suspect you might be using GNU cal that has -d, --include-today
option[1].  If that is correct
the report is best to forward to related mail-list[2].

[1] https://www.gnu.org/software/gcal/manual/gcal.html#index-_002dd
[2] https://www.gnu.org/software/gcal/

-- 
Sami Kerola
http://www.iki.fi/kerolasa/

      parent reply	other threads:[~2021-02-15 16:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-15 15:28 [bug report] cal command segmentation fault Diego Kreutz
2021-02-15 15:48 ` Anatoly Pugachev
2021-02-15 15:56   ` Diego Kreutz
2021-02-15 15:55 ` Sami Kerola [this message]

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