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 77A7F848C for ; Fri, 10 Mar 2023 14:24:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C38C3C433D2; Fri, 10 Mar 2023 14:24:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678458276; bh=p2bZOgehJ4DmOBPea7v6KYn+JokJdFVcBZSbH9GKNsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1xV1X3PYTSUgxPtHhyVTPH3h5bzgnfJQ8MZtf5VdkT4UdDwkq3r0GuCvqrIoAvHRz 4Vk/a0jJkbzNKhYv2OM9XoDCZRJheRLYnyLEN63XDop1CK6Ytw/4ng9K+zig/wyBi5 ms51TgTL7AuBIQl84DYv7FIzMdX+40JvcZBshUrQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tomas Henzl , "Martin K. Petersen" Subject: [PATCH 4.19 191/252] scsi: ses: Fix possible desc_ptr out-of-bounds accesses Date: Fri, 10 Mar 2023 14:39:21 +0100 Message-Id: <20230310133724.729446374@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133718.803482157@linuxfoundation.org> References: <20230310133718.803482157@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: Tomas Henzl commit 801ab13d50cf3d26170ee073ea8bb4eececb76ab upstream. Sanitize possible desc_ptr out-of-bounds accesses in ses_enclosure_data_process(). Link: https://lore.kernel.org/r/20230202162451.15346-4-thenzl@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Tomas Henzl Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/ses.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) --- a/drivers/scsi/ses.c +++ b/drivers/scsi/ses.c @@ -588,15 +588,19 @@ static void ses_enclosure_data_process(s int max_desc_len; if (desc_ptr) { - if (desc_ptr >= buf + page7_len) { + if (desc_ptr + 3 >= buf + page7_len) { desc_ptr = NULL; } else { len = (desc_ptr[2] << 8) + desc_ptr[3]; desc_ptr += 4; - /* Add trailing zero - pushes into - * reserved space */ - desc_ptr[len] = '\0'; - name = desc_ptr; + if (desc_ptr + len > buf + page7_len) + desc_ptr = NULL; + else { + /* Add trailing zero - pushes into + * reserved space */ + desc_ptr[len] = '\0'; + name = desc_ptr; + } } } if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||