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 1C69F1863 for ; Wed, 28 Dec 2022 15:48:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92051C433D2; Wed, 28 Dec 2022 15:48:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672242506; bh=Z2ckRWTzViCVmEP3HHe6noxfScnOfOBfJzVUa+ToXeU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pBj9DTkjvyeLLcqtlZ2QtBIHCMKbF3JMKNCJEPBoezQOwInqiFETulIkIoXx5+3ie o8/Qxi/ES5N2+umIGfAWKVCnALSIvGMA3HR1s7fawD5SuoyxdaFmYFoS54AxeHCdaD vIpKpSqHKDzI3BJTr8hrqpPuJmlEUWjrkDy1Ju7o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, David Howells , Marc Dionne , linux-afs@lists.infradead.org, "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 611/731] rxrpc: Fix missing unlock in rxrpc_do_sendmsg() Date: Wed, 28 Dec 2022 15:41:58 +0100 Message-Id: <20221228144314.246739993@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144256.536395940@linuxfoundation.org> References: <20221228144256.536395940@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: David Howells [ Upstream commit 4feb2c44629e6f9b459b41a5a60491069d346a95 ] One of the error paths in rxrpc_do_sendmsg() doesn't unlock the call mutex before returning. Fix it to do this. Note that this still doesn't get rid of the checker warning: ../net/rxrpc/sendmsg.c:617:5: warning: context imbalance in 'rxrpc_do_sendmsg' - wrong count at exit I think the interplay between the socket lock and the call's user_mutex may be too complicated for checker to analyse, especially as rxrpc_new_client_call_for_sendmsg(), which it calls, returns with the call's user_mutex if successful but unconditionally drops the socket lock. Fixes: e754eba685aa ("rxrpc: Provide a cmsg to specify the amount of Tx data for a call") Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/rxrpc/sendmsg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index 3c3a626459de..d4e4e94f4f98 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -716,7 +716,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len) if (call->tx_total_len != -1 || call->tx_pending || call->tx_top != 0) - goto error_put; + goto out_put_unlock; call->tx_total_len = p.call.tx_total_len; } } -- 2.35.1