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 925D11D5AD1; Sun, 24 Nov 2024 13:35:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732455324; cv=none; b=g/jh92/N3K14nOV6KFZLieacQxZGXWtWLSZ+XsCfzdlThRaClldCnaHbmn+qE/8tfVIy3ePUEc5PXso9qekIJ6FMRc4Job3JuIeQewlDwZfUTxpKZWi+60Gp11jPHY7e8gHj/Tw7uT3NppPVcapezAo/aWme/xccwg1rcADrXcQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732455324; c=relaxed/simple; bh=2P3YUjH5nQjbTs4MGpcZG0JsYaqdj7aLsfjD8A5RQAM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hVgZ3BGvyM+PiISRy9E/SoAgyCExQ0UpQd53ZwDLqlTEXfcRtRs2iYAboXMkxXb0vrcoR1R9RYpq2jDRIRbNsBB6ZcZjbK+4jRItpr51F1BxNhtwhS3U05SlNzIuU3LiBR6SeDznW2pm/bl5Q/DbFiQRiPuGwP2dMeoOYHIPTEs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Jbyf3y8G; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Jbyf3y8G" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EADA6C4CED3; Sun, 24 Nov 2024 13:35:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732455324; bh=2P3YUjH5nQjbTs4MGpcZG0JsYaqdj7aLsfjD8A5RQAM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jbyf3y8GREjROHXKJR8fQ4eWbT8/krz0q7JddB04UzaIrHLlh5mH7xCPgo32QtLzE UstoDCELsIbWs+Jz/Yg9PLEGTKIrrgf0jquhjJirEaapNNlOnKxAt2hWFJgzx+rXfj F2kelckPFF/FSns2qqZWvGFTNiJIDPzMjerKW/AYrWI0yHOSsBYuSQMDKgrUM6ID3y vJqok0NksUhxlmA8PvJx6rt3zF1L95NjfFrapcdUALCScteB+lqLJHURt7PcMMevJ6 zGA1cFX3LMxZ4pW4i7ZWrQTpOOnoj3PHOWBfVSsiy+MOU3KBJyqKzGG9zXhJeK9yYq 00mDCJymtxXow== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ignat Korchagin , Miquel Raynal , Kuniyuki Iwashima , Eric Dumazet , Jakub Kicinski , Sasha Levin , alex.aring@gmail.com, stefan@datenfreihafen.org, davem@davemloft.net, pabeni@redhat.com, linux-wpan@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 6.12 042/107] net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() Date: Sun, 24 Nov 2024 08:29:02 -0500 Message-ID: <20241124133301.3341829-42-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241124133301.3341829-1-sashal@kernel.org> References: <20241124133301.3341829-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.1 Content-Transfer-Encoding: 8bit From: Ignat Korchagin [ Upstream commit b4fcd63f6ef79c73cafae8cf4a114def5fc3d80d ] sock_init_data() attaches the allocated sk object to the provided sock object. If ieee802154_create() fails later, the allocated sk object is freed, but the dangling pointer remains in the provided sock object, which may allow use-after-free. Clear the sk pointer in the sock object on error. Signed-off-by: Ignat Korchagin Reviewed-by: Miquel Raynal Reviewed-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20241014153808.51894-6-ignat@cloudflare.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/ieee802154/socket.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c index 990a83455dcfb..18d267921bb53 100644 --- a/net/ieee802154/socket.c +++ b/net/ieee802154/socket.c @@ -1043,19 +1043,21 @@ static int ieee802154_create(struct net *net, struct socket *sock, if (sk->sk_prot->hash) { rc = sk->sk_prot->hash(sk); - if (rc) { - sk_common_release(sk); - goto out; - } + if (rc) + goto out_sk_release; } if (sk->sk_prot->init) { rc = sk->sk_prot->init(sk); if (rc) - sk_common_release(sk); + goto out_sk_release; } out: return rc; +out_sk_release: + sk_common_release(sk); + sock->sk = NULL; + goto out; } static const struct net_proto_family ieee802154_family_ops = { -- 2.43.0