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From: Stefano Brivio <sbrivio@redhat.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: passt-dev@passt.top, Matej Hrica <mhrica@redhat.com>
Subject: Re: [PATCH 3/4] util, lineread, tap: Overflow checks on long signed sums and subtractions
Date: Mon, 8 Jul 2024 15:01:37 +0200	[thread overview]
Message-ID: <20240708150137.1b3c94d4@elisabeth> (raw)
In-Reply-To: <20240628203054.73eff0a3@elisabeth>

On Fri, 28 Jun 2024 20:30:54 +0200
Stefano Brivio <sbrivio@redhat.com> wrote:

> I think this proves that Coverity really isn't happy unless the sum
> itself happens in infinite precision (not even size_t domain with
> ssize_t operands is enough).
> 
> So, well, I can report the false positive, unless you have further
> ideas to check.
> 
> Meanwhile, we can either try to make this patch more acceptable, or
> I'll suppress checks (downstream) as needed.

By the way, somewhat on the subject:
  https://lore.kernel.org/all/202404291502.612E0A10@keescook/#r
  https://lwn.net/ml/linux-kernel/202404291502.612E0A10@keescook/
  (I read it from my client, but I can't decide what web interface I
  would otherwise like the most...)

-- 
Stefano


  reply	other threads:[~2024-07-08 13:02 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-26 23:45 [PATCH 0/4] Small, assorted "hardening" fixes Stefano Brivio
2024-06-26 23:45 ` [PATCH 1/4] conf: Copy up to MAXDNSRCH - 1 bytes, not MAXDNSRCH Stefano Brivio
2024-06-27  0:45   ` David Gibson
2024-06-27  7:27     ` Stefano Brivio
2024-06-27 10:11       ` David Gibson
2024-06-26 23:45 ` [PATCH 2/4] tcp_splice: Check return value of setsockopt() for SO_RCVLOWAT Stefano Brivio
2024-06-27  0:46   ` David Gibson
2024-06-26 23:45 ` [PATCH 3/4] util, lineread, tap: Overflow checks on long signed sums and subtractions Stefano Brivio
2024-06-27  1:13   ` David Gibson
2024-06-27  7:55     ` Stefano Brivio
2024-06-27 20:46       ` Stefano Brivio
2024-06-28  7:15         ` David Gibson
2024-06-28  7:11       ` David Gibson
2024-06-28  7:55         ` Stefano Brivio
2024-06-28 18:30           ` Stefano Brivio
2024-07-08 13:01             ` Stefano Brivio [this message]
2024-06-26 23:45 ` [PATCH 4/4] tap: Drop frames from guest whose length is more than remaining buffer Stefano Brivio
2024-06-27  1:30   ` David Gibson
2024-06-27  8:21     ` Stefano Brivio
2024-06-28  7:19       ` David Gibson
2024-06-28  7:56         ` Stefano Brivio

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