linux-kernel - Re: [PATCH net-next v10 08/16] tls: Inline do_tcp

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Message-ID: <3280197.1687884949@warthog.procyon.org.uk>
Date:   Tue, 27 Jun 2023 17:55:49 +0100
From:   David Howells <dhowells@...hat.com>
To:     Tariq Toukan <ttoukan.linux@...il.com>
Cc:     dhowells@...hat.com, netdev@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        David Ahern <dsahern@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        Jens Axboe <axboe@...nel.dk>, Jeff Layton <jlayton@...nel.org>,
        Christian Brauner <brauner@...nel.org>,
        Chuck Lever III <chuck.lever@...cle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Boris Pismenny <borisp@...dia.com>,
        John Fastabend <john.fastabend@...il.com>,
        Gal Pressman <gal@...dia.com>, ranro@...dia.com,
        samiram@...dia.com, drort@...dia.com,
        Tariq Toukan <tariqt@...dia.com>
Subject: Re: [PATCH net-next v10 08/16] tls: Inline do_tcp_sendpages()

Tariq Toukan <ttoukan.linux@...il.com> wrote:

> WARNING: CPU: 2 PID: 93427 at net/core/skbuff.c:7013

Is that this line for you:

			} else if (WARN_ON_ONCE(!sendpage_ok(page))) {

If so, it's not slab data, but we've got a page with a 0 refcount from
somewhere.

David