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 117C31DE8B4; Wed, 6 Nov 2024 12:16:43 +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=1730895404; cv=none; b=ZvMdUfFRsM5hcgWvA83f11l20wPB0SPziAgfS+Kl5Bc8nubWBS80X/9KPrt3iKX8fxPFwHVieTCOHTSwus0IO/UEKEcECm8J9R5wVB0vJACOSzRs9Vht0tVBG5pFhP0l0WZ3K2jcbxpVI51HOBvIqPAKjMq085gocVKJ8+OdmS8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730895404; c=relaxed/simple; bh=GR1vuRM/a33M+N2ke4QagxaNpKKXmbiA+vJm2N7/TXQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UpBeQa9nL38ZQa/l7wPJhSG6tVbH2t9AB7MP8bCQWVS1tBFq572DDxp+qELoGFGmIF6pMr2V31OrZ/v5GNXPqSzsobAQ9LHdOWfQJfm4GOtkh7yED+2VXA/bzubgzJWUf0iGc+Ak4sCeIN9mItT8Si0HhMLW4FdmbQrQFmBpAlU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jTCBekxD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="jTCBekxD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30F55C4CECD; Wed, 6 Nov 2024 12:16:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730895403; bh=GR1vuRM/a33M+N2ke4QagxaNpKKXmbiA+vJm2N7/TXQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jTCBekxDmK4sdnOrbFqREpvrvqYZS0SMs0z+FtQxdcxBdkbbU9uxyfNsBzNFRtFJn ZL5kTHMo+2Ko7OIR67tYxL18BY91VUiR2wdEGw5cWJHFgh+ITOH8y0ewfQOltlaopV aA81I96EdGgw65S1PcvH18bpOEiyJJunRd5XNCVU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nicolai Stange , Chun-Yi Lee , Jens Axboe Subject: [PATCH 4.19 205/350] aoe: fix the potential use-after-free problem in more places Date: Wed, 6 Nov 2024 13:02:13 +0100 Message-ID: <20241106120326.047555956@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241106120320.865793091@linuxfoundation.org> References: <20241106120320.865793091@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chun-Yi Lee commit 6d6e54fc71ad1ab0a87047fd9c211e75d86084a3 upstream. For fixing CVE-2023-6270, f98364e92662 ("aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts") makes tx() calling dev_put() instead of doing in aoecmd_cfg_pkts(). It avoids that the tx() runs into use-after-free. Then Nicolai Stange found more places in aoe have potential use-after-free problem with tx(). e.g. revalidate(), aoecmd_ata_rw(), resend(), probe() and aoecmd_cfg_rsp(). Those functions also use aoenet_xmit() to push packet to tx queue. So they should also use dev_hold() to increase the refcnt of skb->dev. On the other hand, moving dev_put() to tx() causes that the refcnt of skb->dev be reduced to a negative value, because corresponding dev_hold() are not called in revalidate(), aoecmd_ata_rw(), resend(), probe(), and aoecmd_cfg_rsp(). This patch fixed this issue. Cc: stable@vger.kernel.org Link: https://nvd.nist.gov/vuln/detail/CVE-2023-6270 Fixes: f98364e92662 ("aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts") Reported-by: Nicolai Stange Signed-off-by: Chun-Yi Lee Link: https://lore.kernel.org/stable/20240624064418.27043-1-jlee%40suse.com Link: https://lore.kernel.org/r/20241002035458.24401-1-jlee@suse.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/block/aoe/aoecmd.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -362,6 +362,7 @@ ata_rw_frameinit(struct frame *f) } ah->cmdstat = ATA_CMD_PIO_READ | writebit | extbit; + dev_hold(t->ifp->nd); skb->dev = t->ifp->nd; } @@ -402,6 +403,8 @@ aoecmd_ata_rw(struct aoedev *d) __skb_queue_head_init(&queue); __skb_queue_tail(&queue, skb); aoenet_xmit(&queue); + } else { + dev_put(f->t->ifp->nd); } return 1; } @@ -484,10 +487,13 @@ resend(struct aoedev *d, struct frame *f memcpy(h->dst, t->addr, sizeof h->dst); memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src); + dev_hold(t->ifp->nd); skb->dev = t->ifp->nd; skb = skb_clone(skb, GFP_ATOMIC); - if (skb == NULL) + if (skb == NULL) { + dev_put(t->ifp->nd); return; + } f->sent = ktime_get(); __skb_queue_head_init(&queue); __skb_queue_tail(&queue, skb); @@ -618,6 +624,8 @@ probe(struct aoetgt *t) __skb_queue_head_init(&queue); __skb_queue_tail(&queue, skb); aoenet_xmit(&queue); + } else { + dev_put(f->t->ifp->nd); } } @@ -1407,6 +1415,7 @@ aoecmd_ata_id(struct aoedev *d) ah->cmdstat = ATA_CMD_ID_ATA; ah->lba3 = 0xa0; + dev_hold(t->ifp->nd); skb->dev = t->ifp->nd; d->rttavg = RTTAVG_INIT; @@ -1416,6 +1425,8 @@ aoecmd_ata_id(struct aoedev *d) skb = skb_clone(skb, GFP_ATOMIC); if (skb) f->sent = ktime_get(); + else + dev_put(t->ifp->nd); return skb; }