From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A2FAF475325 for ; Mon, 12 Oct 2026 10:10:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791799843; cv=none; b=QSBAtdM/YkxORoe8Fr9xkTnNvq56n5eO2kS1p5KYmgdeXjG++Wl9jrlJkQ26P0OTXtBV1fnkWYzqldwFs71afS0Z85tGtH58H+2zB90a/2U8y1+rtsmOfzf40jSndcd2puYsWhDLlUPZLYmgvk1Kzm77KOU206H3dzs4P7Yh2eE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791799843; c=relaxed/simple; bh=C7DFAyYtQTsJcXCP2mKvtachpHkj6EQNB+bwdyFIG5w=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=okhNCgYZmFF0ls5YjAe2sK2FCVQ93d2twbnvqZ2M+PCYx7hlNfKENrpoxwE/dK3xW69nEVRtHO6KDePLQo0wvgkcp0SG71SImnZxfT4OX6Hxne+UWOxq2okFr55naS6BIhJFW9RbjFMu+2EjF28bfbFBLpo6loPyVSN2l7my8xY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MLZqKO4a; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MLZqKO4a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9D7791F0089B; Mon, 12 Oct 2026 10:10:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791799835; bh=FqZ/8nmWNeGu8rw19biGCW0dw9zAMtjcV265Zp117aE=; h=From:To:Cc:Subject:Date; b=MLZqKO4a0ZNT615r39WQz0ZLvmzAlZPtNbBLPs/qsZN4fkx9xh6sTvgC0Yj6mOZrC FXMNyVOlGJ8Sn/VQgUIins0uwGN0dIMvgaRKiGeXzZpy8Q7YaMNavHIoEvM/z+iqTV au577/YeAwAGzAesW2Qw/cx3UFMEAxrFGPTnbegQKInDNYdo7Bg8h7+Pn1wGNDMAIp WPjdsuf9dYfl65nKTo04FwLIZzQP+XIBdBdaVplVa8YvHOsyylVu8UPNkXrIaJag4y M2GfhgdLa6JvNmv09kBb2c/THFQaFJRHz7yCg7xhSS1ReU9pZBSteRod56d43RlG8Q aZyiLtOioFn9g== From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski , Paolo Abeni Cc: Kuniyuki Iwashima , Neal Cardwell , Ido Schimmel , Theodor Arsenij Larionov Trichkine , Simon Horman , netdev@vger.kernel.org, Eric Dumazet Subject: [PATCH v3 net 0/2] net: fix sk_mc_loop() with request and timewait sockets Date: Mon, 12 Oct 2026 12:10:27 +0200 Message-ID: <20261012101029.927296-1-edumazet@kernel.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Patch 1 fixes an out-of-bounds read in sk_mc_loop() when skb->sk is a request or a timewait socket, by using the full socket. Patch 2 fixes the route lookup of cookie_v4_check() when the ACK carries a source route option, found while looking at the above. Refusing to send TCP packets to broadcast or multicast destinations is left for net-next. v3: - Back to the v1 approach for the sk_mc_loop() fix: checking the destination in TCP (v2) does not cover source routes, multicast typed routes on unicast prefixes, or the TIME_WAIT reply path. - Add the TIME_WAIT case and its Fixes tag. - Add patch 2. v2: https://lore.kernel.org/netdev/20261008114942.1376889-1-theodorlarionov@gmail.com/ v1: https://lore.kernel.org/netdev/20261008100423.1256884-1-theodorlarionov@gmail.com/ Eric Dumazet (1): tcp: use the echoed source route in cookie_v4_check() Theodor Arsenij Larionov Trichkine (1): net: use the full socket in sk_mc_loop() net/core/sock.c | 1 + net/ipv4/syncookies.c | 12 ++++++++++-- 2 files changed, 11 insertions(+), 2 deletions(-) -- 2.53.0