From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B16E99446 for ; Sun, 13 Aug 2023 21:36:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33C85C433C8; Sun, 13 Aug 2023 21:36:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691962595; bh=a4IDtCgJOgDbARXUSWs5RXi40sMDtYGE469G2EX8QtM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xQPGIX9d1ZrQaPIzeZ4X22o8jMbpkgpl5jMx/i/vGjoTfR3mN6wQA0IFinx6ksXRU udNqpJUDmEOmQW/+gY+BQHAcyql+XKMOqxIGtCv7p31q6/yQegL9yJHoDo4aKKuaOA Hj0pc+mWJkbb5uN3KaJl7TyUiFUO1DUA9i3MUWNc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xu Kuohai , John Fastabend , Martin KaFai Lau Subject: [PATCH 6.1 085/149] bpf, sockmap: Fix bug that strp_done cannot be called Date: Sun, 13 Aug 2023 23:18:50 +0200 Message-ID: <20230813211721.334869797@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230813211718.757428827@linuxfoundation.org> References: <20230813211718.757428827@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Xu Kuohai commit 809e4dc71a0f2b8d2836035d98603694fff11d5d upstream. strp_done is only called when psock->progs.stream_parser is not NULL, but stream_parser was set to NULL by sk_psock_stop_strp(), called by sk_psock_drop() earlier. So, strp_done can never be called. Introduce SK_PSOCK_RX_ENABLED to mark whether there is strp on psock. Change the condition for calling strp_done from judging whether stream_parser is set to judging whether this flag is set. This flag is only set once when strp_init() succeeds, and will never be cleared later. Fixes: c0d95d3380ee ("bpf, sockmap: Re-evaluate proto ops when psock is removed from sockmap") Signed-off-by: Xu Kuohai Reviewed-by: John Fastabend Link: https://lore.kernel.org/r/20230804073740.194770-3-xukuohai@huaweicloud.com Signed-off-by: Martin KaFai Lau Signed-off-by: Greg Kroah-Hartman --- include/linux/skmsg.h | 1 + net/core/skmsg.c | 10 ++++++++-- 2 files changed, 9 insertions(+), 2 deletions(-) --- a/include/linux/skmsg.h +++ b/include/linux/skmsg.h @@ -62,6 +62,7 @@ struct sk_psock_progs { enum sk_psock_state_bits { SK_PSOCK_TX_ENABLED, + SK_PSOCK_RX_STRP_ENABLED, }; struct sk_psock_link { --- a/net/core/skmsg.c +++ b/net/core/skmsg.c @@ -1117,13 +1117,19 @@ static void sk_psock_strp_data_ready(str int sk_psock_init_strp(struct sock *sk, struct sk_psock *psock) { + int ret; + static const struct strp_callbacks cb = { .rcv_msg = sk_psock_strp_read, .read_sock_done = sk_psock_strp_read_done, .parse_msg = sk_psock_strp_parse, }; - return strp_init(&psock->strp, sk, &cb); + ret = strp_init(&psock->strp, sk, &cb); + if (!ret) + sk_psock_set_state(psock, SK_PSOCK_RX_STRP_ENABLED); + + return ret; } void sk_psock_start_strp(struct sock *sk, struct sk_psock *psock) @@ -1151,7 +1157,7 @@ void sk_psock_stop_strp(struct sock *sk, static void sk_psock_done_strp(struct sk_psock *psock) { /* Parser has been stopped */ - if (psock->progs.stream_parser) + if (sk_psock_test_state(psock, SK_PSOCK_RX_STRP_ENABLED)) strp_done(&psock->strp); } #else