netdev - Re: [PATCH v4 net 0/3] udp: Fix two integer overflows when sk->sk_rcvbuf is close to INT

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Message-ID: <20250331203303.17835-1-kuniyu@amazon.com>
Date: Mon, 31 Mar 2025 13:31:47 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: <kuniyu@...zon.com>
CC: <davem@...emloft.net>, <dsahern@...nel.org>, <edumazet@...gle.com>,
	<horms@...nel.org>, <kuba@...nel.org>, <kuni1840@...il.com>,
	<netdev@...r.kernel.org>, <pabeni@...hat.com>,
	<willemdebruijn.kernel@...il.com>
Subject: Re: [PATCH v4 net 0/3] udp: Fix two integer overflows when sk->sk_rcvbuf is close to INT_MAX.

From: Kuniyuki Iwashima <kuniyu@...zon.com>
Date: Mon, 31 Mar 2025 11:54:53 -0700
> From: Jakub Kicinski <kuba@...nel.org>
> Date: Mon, 31 Mar 2025 11:36:03 -0700
> > On Mon, 31 Mar 2025 11:21:34 -0700 Kuniyuki Iwashima wrote:
> > > > Plus we also see failures in udpgso.sh  
> > > 
> > > I forgot to update `size` when skb_condense() is called.
> > > 
> > > Without the change I saw the new test stuck at 1 page after
> > > udpgso.sh, but with the change both passed.
> > > 
> > > Will post v5.
> > 
> > Please do test locally if you can.
> 
> Sure, will try the same tests with CI.

Is there a way to tell NIPA to run a test in a dedicated VM ?

I see some tests succeed when executed solely but fail when
executed with

  make -C tools/testing/selftests/ TARGETS=net run_tests

When combined with other tests, assuming that the global UDP usage
will soon drop to 0 is not always easy... so it's defeating the
purpose but I'd drop the test in v5 not to make CI unhappy.