From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>,
git@vger.kernel.org, Jonathan Tan <jonathantanmy@google.com>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>
Subject: Re: [PATCH v2 3/3] sideband: add defense against packets missing a band designator
Date: Fri, 23 Oct 2020 07:44:27 -0700 [thread overview]
Message-ID: <xmqqv9f1huic.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <20201023083424.GD4012156@coredump.intra.peff.net> (Jeff King's message of "Fri, 23 Oct 2020 04:34:24 -0400")
Jeff King <peff@peff.net> writes:
> On Mon, Oct 19, 2020 at 07:35:42PM +0000, Johannes Schindelin via GitGitGadget wrote:
>
>> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>>
>> While there is currently no instance of code producing this type of
>> packet, if the `demultiplex_sideband()` would receive a packet whose
>> payload is not only empty but even misses the band designator, it would
>> mistake it for a flush packet.
>>
>> Let's defend against such a bug in the future.
>
> That seems reasonable, but I'm not sure if these ought to be BUG()s.
> Isn't it an indication that the other side sent us bogus input? That
> likely is a bug on the other end, but I think it should be a die(), just
> as we would produce for any other malformed protocol input.
Thanks for spotting. I also think this was a good change, but at
this point in the code we found a problem in the data the other side
created (i.e. we diagnosed a bug on the other side), which is a
usual input error, so it should not be a BUG().
Would this be something we can warn and ignore if the connection is
still active, I wonder, though.
next prev parent reply other threads:[~2020-10-23 14:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-13 14:45 [PATCH] t5500.43: make the check a bit more robust Johannes Schindelin via GitGitGadget
2020-10-13 17:53 ` Junio C Hamano
2020-10-13 18:55 ` Jeff King
2020-10-13 19:07 ` Junio C Hamano
2020-10-13 19:09 ` Jeff King
2020-10-17 3:31 ` Johannes Schindelin
2020-10-17 2:34 ` Johannes Schindelin
2020-10-19 19:35 ` [PATCH v2 0/3] Work around flakiness in t5500.43 Johannes Schindelin via GitGitGadget
2020-10-19 19:35 ` [PATCH v2 1/3] sideband: avoid reporting incomplete sideband messages Johannes Schindelin via GitGitGadget
2020-10-20 20:33 ` Junio C Hamano
2020-10-20 20:48 ` Johannes Schindelin
2020-10-20 21:33 ` Junio C Hamano
2020-10-19 19:35 ` [PATCH v2 2/3] sideband: report unhandled incomplete sideband messages as bugs Johannes Schindelin via GitGitGadget
2020-10-19 19:35 ` [PATCH v2 3/3] sideband: add defense against packets missing a band designator Johannes Schindelin via GitGitGadget
2020-10-20 20:36 ` Junio C Hamano
2020-10-23 8:34 ` Jeff King
2020-10-23 14:44 ` Junio C Hamano [this message]
2020-10-23 8:48 ` Jeff King
2020-10-23 5:36 ` Johannes Schindelin
2020-10-23 8:50 ` [PATCH v2 0/3] Work around flakiness in t5500.43 Jeff King
2020-10-26 16:04 ` Johannes Schindelin
2020-10-26 16:09 ` [PATCH v3 0/2] " Johannes Schindelin via GitGitGadget
2020-10-26 16:09 ` [PATCH v3 1/2] sideband: avoid reporting incomplete sideband messages Johannes Schindelin via GitGitGadget
2020-10-26 16:09 ` [PATCH v3 2/2] sideband: report unhandled incomplete sideband messages as bugs Johannes Schindelin via GitGitGadget
2020-10-26 18:33 ` [PATCH v3 0/2] Work around flakiness in t5500.43 Junio C Hamano
2020-10-27 6:52 ` [PATCH] sideband: diagnose more incoming packet anomalies Jeff King
2020-10-27 7:12 ` Jeff King
2020-10-27 18:56 ` Junio C Hamano
2020-10-27 20:42 ` Jeff King
2020-10-27 21:38 ` Junio C Hamano
2020-10-28 9:33 ` Jeff King
2020-10-27 7:13 ` Jeff King
2020-10-27 19:04 ` Junio C Hamano
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