From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 02 Apr 2026 09:21:57 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1w8CNJ-007lhx-1z for lore@lore.pengutronix.de; Thu, 02 Apr 2026 09:21:57 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1w8CNJ-0008TC-2L for lore@pengutronix.de; Thu, 02 Apr 2026 09:21:57 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:To: Content-Transfer-Encoding:Content-Type:MIME-Version:Message-Id:Date:Subject: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=mEq9Yrt6nVXwL6zBVyWAmEiB4ToNhwDUDj4bAZVRfP0=; b=nIQWXuz2ITRXkE rLS5oMGcxaF3BSYyUfcks6E29OtWheKy0eo0/4N8qgchvkxgS2BRnp1eGeX6tWk0em7aOtBf+1oIv 3PrAKZGgrgVw18LvFMJwAaD+DKVgHkgBP+FmxPkLPF29U7NOD/hVjimV8U9fWCxc5tDvp4ksPD2yg /BcPhDvWOARLBIvj6nxXV7EVMrgPHvDF/TlnqasFv46j0nDBQ3fv2+Yq9JziKzN8jdSZWjczIR6ZO 2sE2cLI2PY+s+0kb5Va8IK8lPkIibVTjJ21wxCc1JasDhmxbMBklgFggV9DsUQRrqlizS4KZGUugV jFUgu2GtUkmrK1vUqoZg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w8CMp-0000000H2HW-1LPZ; Thu, 02 Apr 2026 07:21:27 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w8CMl-0000000H2FT-1kr1 for barebox@lists.infradead.org; Thu, 02 Apr 2026 07:21:24 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1w8CMj-0008Da-Oi; Thu, 02 Apr 2026 09:21:21 +0200 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1w8CMj-003Kwd-1b; Thu, 02 Apr 2026 09:21:21 +0200 Received: from [::1] (helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1w8CMj-00000003PEH-1mR4; Thu, 02 Apr 2026 09:21:21 +0200 From: Sascha Hauer Date: Thu, 02 Apr 2026 09:21:18 +0200 Message-Id: <20260402-net-tftp-buffer-overflows-v1-0-0a18aa8ea19e@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAO4YzmkC/x3Myw6CMBBG4Vchs3aSUqVeXoWwEP0HJzEtmRY0I by7jctvcc5GGabIdGs2MqyaNcWK9tDQ43WPE1if1eSdD+7kPEcULlJmHhcRGKcVJu/0yRzGy/E K6c4+tFT72SD6/b/7Yd9/DeWmTGsAAAA= X-Change-ID: 20260402-net-tftp-buffer-overflows-6b839ef57261 To: BAREBOX X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775114481; l=701; i=s.hauer@pengutronix.de; s=20230412; h=from:subject:message-id; bh=lv/FnnCE4SpJjimed7q+joO0JuntKcnnbGBdxr2dlzc=; b=8Sm/25P2gVnz84XtHKYg4I2MSib0WHvD4NfRLJzAVOAaIP5mp1pkLKur0c+qblRa59ZXuMYCT kS0OohysCTnAB2WJre0g8AXQN+f/kPDJvqiJG/X9MayI2/hhjVHHtvj X-Developer-Key: i=s.hauer@pengutronix.de; a=ed25519; pk=4kuc9ocmECiBJKWxYgqyhtZOHj5AWi7+d0n/UjhkwTg= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260402_002123_600095_985F47F5 X-CRM114-Status: UNSURE ( 4.83 ) X-CRM114-Notice: Please train this message. X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Claude Opus 4.6 \(1M context\)" Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 0/4] tftp: fix buffer overflows X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) This adds more checks on incoming network data to prevent buffer overflows. Signed-off-by: Sascha Hauer --- Sascha Hauer (4): fs: tftp: prevent packet buffer overflow from long filenames fs: tftp: fix OACK option parsing bounds check fs: tftp: reject OACK with blocksize of zero fs: tftp: use bounded format for TFTP error message debug print fs/tftp.c | 45 +++++++++++++++++++++++++++++++++++---------- 1 file changed, 35 insertions(+), 10 deletions(-) --- base-commit: 0933e8f2ebf0d91dfcf177a4e4292b02921a53f1 change-id: 20260402-net-tftp-buffer-overflows-6b839ef57261 Best regards, -- Sascha Hauer