From patchwork Sun Dec 22 20:12:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 853181 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 B326E18FDA9; Sun, 22 Dec 2024 20:12:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734898340; cv=none; b=nFc6nb8kVsY3F/8X6LY5y3vaEUQod5op3H3z2I52M0v493Wioo3Tqgrq6/ph867F38mgO3fMNTws3HVMsAmk7UF29LPyUSN7cx9mvMxeWqk2qQ1HbraUOCccioKtKbjGau9ic8pA20lNQiS5fcNV8bSchdE2qDTWU9odkqo0SnU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734898340; c=relaxed/simple; bh=6FGpWh3w+14vFPuNhzbBOP2W2UrYVN3Y1Zg7VP/hknw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=t13dSjI9WS6MEeBgoBSAFdBOp70pWPuXdCa6dk8AMvhQ9z+r2ClqkLc8puNeK6OumNHDJxSlzJvBQNhI8976vzzq1Y+6HNhNpyLO6kbbENXYlynpziSXdSMunBdKW+/WGTSc1/IkkBQswIHU2ONr8LUUdEvlYucT/ae0M+cMmUk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=sy9+DM47; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="sy9+DM47" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1734898335; bh=6FGpWh3w+14vFPuNhzbBOP2W2UrYVN3Y1Zg7VP/hknw=; h=From:Date:Subject:To:Cc:From; b=sy9+DM47sX/eDnqT4zIdi/i/p7GPlbIfF6XcYSfc+uZ6RPMyQnla7+o4Sm/YAptBl E7jdOoMpB6yQN6etXCekkwM1YY3ZyNUe5Pln6A/Y6Bv9F9B9d3H0dgGw8w74aDUW2z FzfRz5qkO1Nhoqelp1zOOqGg2tQvSk3H+gxFPwy4= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Sun, 22 Dec 2024 21:12:13 +0100 Subject: [PATCH] usb: core: sysfs: Constify 'struct bin_attribute' Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241222-sysfs-const-bin_attr-usb-v1-1-19a137c0f20a@weissschuh.net> X-B4-Tracking: v=1; b=H4sIAJ1yaGcC/x3MTQqEMAxA4atI1hNogz/gVUSGVlPNpkpThxHx7 haX3+K9C5STsEJfXZD4JypbLLCfCqbVxYVR5mIgQ7UlItRTg+K0Rc3oJX5dzgkP9diG0LWmcab pLJR8Txzk/66H8b4ffFZu+2oAAAA= X-Change-ID: 20241222-sysfs-const-bin_attr-usb-6ff7605a0571 To: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Thoma?= =?utf-8?q?s_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1734898334; l=2411; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=6FGpWh3w+14vFPuNhzbBOP2W2UrYVN3Y1Zg7VP/hknw=; b=3UnW/hW2hni3ClyqqzV5gy5+x6fuB3NSFuOhBVutNC+XjnpcqyMX+sncvmt4SV/7OU68IXoNR LAKt0uJyxQcCDNp6xIGCOxF+9POXTxAU6O5twUTN27XnhP0vs6WCusQ X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= The sysfs core now allows instances of 'struct bin_attribute' to be moved into read-only memory. Make use of that to protect them against accidental or malicious modifications. Signed-off-by: Thomas Weißschuh --- drivers/usb/core/sysfs.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- base-commit: bcde95ce32b666478d6737219caa4f8005a8f201 change-id: 20241222-sysfs-const-bin_attr-usb-6ff7605a0571 Best regards, diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index b4cba23831acd2d7d395b9f7683cd3ee3a8623c8..23f3cb1989f408ecb6b679e6cbe4857384188ae4 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -854,7 +854,7 @@ static const struct attribute_group dev_string_attr_grp = { static ssize_t descriptors_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); @@ -890,11 +890,11 @@ descriptors_read(struct file *filp, struct kobject *kobj, } return count - nleft; } -static BIN_ATTR_RO(descriptors, 18 + 65535); /* dev descr + max-size raw descriptor */ +static const BIN_ATTR_RO(descriptors, 18 + 65535); /* dev descr + max-size raw descriptor */ static ssize_t bos_descriptors_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); @@ -913,12 +913,12 @@ bos_descriptors_read(struct file *filp, struct kobject *kobj, } return n; } -static BIN_ATTR_RO(bos_descriptors, 65535); /* max-size BOS */ +static const BIN_ATTR_RO(bos_descriptors, 65535); /* max-size BOS */ /* When modifying this list, be sure to modify dev_bin_attrs_are_visible() * accordingly. */ -static struct bin_attribute *dev_bin_attrs[] = { +static const struct bin_attribute *const dev_bin_attrs[] = { &bin_attr_descriptors, &bin_attr_bos_descriptors, NULL @@ -944,7 +944,7 @@ static umode_t dev_bin_attrs_are_visible(struct kobject *kobj, } static const struct attribute_group dev_bin_attr_grp = { - .bin_attrs = dev_bin_attrs, + .bin_attrs_new = dev_bin_attrs, .is_bin_visible = dev_bin_attrs_are_visible, };