From: Thomas Weißschuh Date: Sun, 22 Dec 2024 20:12:13 +0000 (+0100) Subject: usb: core: sysfs: Constify 'struct bin_attribute' X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=aa13b9d5ae2597a08703cf9aa4b0907d09407888;p=users%2Fhch%2Fmisc.git usb: core: sysfs: Constify 'struct bin_attribute' 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 Link: https://lore.kernel.org/r/20241222-sysfs-const-bin_attr-usb-v1-1-19a137c0f20a@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index b4cba23831ac..23f3cb1989f4 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, };