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 36FA353816; Wed, 21 Feb 2024 13:34:22 +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=1708522462; cv=none; b=QWezCV4n8yG1GXlT9DkHlU+75tKgGmnUazC27UI0mhZEOHxqCgOSTNaAnOZPbpQnHBACt6Mr5+E5EeGzHRUVanfw7Smn83hxeMgRIA6Ia3abfciAX3MQHR7ZvRfXArCHdtroN3dMby/YgJrfzBwpbdvzZJ3pel51hbecBjpw30k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708522462; c=relaxed/simple; bh=breWKp9xRUzk1/J3iVGTmhPfZt45A/kbrs37t5XrELs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZEd+A+JqE3E5brXbecxeDhdk7jesczsmsSL/BEpVS83fKivQ+b6FkV4h5jSrikQVVnM2VzFesUp+yC5TFxkQvoNTJjZ2WNZatkVqVwsIUt+an9NoSrw4PN4lDhHl5iXv74cyxZ9EgdaE6Cvd6zROXIQSN+efoFGR+XjRZwbc5+0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jEqQVu2m; 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="jEqQVu2m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0FEBC433F1; Wed, 21 Feb 2024 13:34:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1708522462; bh=breWKp9xRUzk1/J3iVGTmhPfZt45A/kbrs37t5XrELs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jEqQVu2m6eqdVRVRmU3Dt358m5HSpAAXRZZUKXEsUC5pjMlepya5MPbPF3FXimQOH XFvFaVaxLZ4i654n5vQ1jjL+A4ekAYHWE8lKAXTZ2cvP2Yv1zJSr/uuaIqwLcCe2hD 96w2lHtZPPd+M8C5YQRF4V7Gt/FogCiU8CuWlPcs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Justin Tee , Himanshu Madhani , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.15 169/476] scsi: lpfc: Fix possible file string name overflow when updating firmware Date: Wed, 21 Feb 2024 14:03:40 +0100 Message-ID: <20240221130014.175795353@linuxfoundation.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240221130007.738356493@linuxfoundation.org> References: <20240221130007.738356493@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Justin Tee [ Upstream commit f5779b529240b715f0e358489ad0ed933bf77c97 ] Because file_name and phba->ModelName are both declared a size 80 bytes, the extra ".grp" file extension could cause an overflow into file_name. Define a ELX_FW_NAME_SIZE macro with value 84. 84 incorporates the 4 extra characters from ".grp". file_name is changed to be declared as a char and initialized to zeros i.e. null chars. Signed-off-by: Justin Tee Link: https://lore.kernel.org/r/20231031191224.150862-3-justintee8345@gmail.com Reviewed-by: Himanshu Madhani Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc.h | 1 + drivers/scsi/lpfc/lpfc_init.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index 457ff86e02b3..65ac952b767f 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -32,6 +32,7 @@ struct lpfc_sli2_slim; #define ELX_MODEL_NAME_SIZE 80 +#define ELX_FW_NAME_SIZE 84 #define LPFC_PCI_DEV_LP 0x1 #define LPFC_PCI_DEV_OC 0x2 diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 2ca4cf1b58c4..bba51ce4276a 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -14516,7 +14516,7 @@ lpfc_write_firmware(const struct firmware *fw, void *context) int lpfc_sli4_request_firmware_update(struct lpfc_hba *phba, uint8_t fw_upgrade) { - uint8_t file_name[ELX_MODEL_NAME_SIZE]; + char file_name[ELX_FW_NAME_SIZE] = {0}; int ret; const struct firmware *fw; @@ -14525,7 +14525,7 @@ lpfc_sli4_request_firmware_update(struct lpfc_hba *phba, uint8_t fw_upgrade) LPFC_SLI_INTF_IF_TYPE_2) return -EPERM; - snprintf(file_name, ELX_MODEL_NAME_SIZE, "%s.grp", phba->ModelName); + scnprintf(file_name, sizeof(file_name), "%s.grp", phba->ModelName); if (fw_upgrade == INT_FW_UPGRADE) { ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, -- 2.43.0