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of: Constify 'struct bin_attribute'

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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 <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241222-sysfs-const-bin_attr-of-v1-1-99cc2e8c2a55@weissschuh.net
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Thomas Weißschuh 2024-12-22 21:30:25 +01:00 committed by Rob Herring (Arm)
parent 4c2a458eb5
commit a6a035a83c
1 changed files with 2 additions and 2 deletions
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4
drivers/of/kobj.c
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@ -29,7 +29,7 @@ const struct kobj_type of_node_ktype = {
};
static ssize_t of_node_property_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
const struct bin_attribute *bin_attr, char *buf,
loff_t offset, size_t count)
{
struct property *pp = container_of(bin_attr, struct property, attr);
@ -77,7 +77,7 @@ int __of_add_property_sysfs(struct device_node *np, struct property *pp)
pp->attr.attr.name = safe_name(&np->kobj, pp->name);
pp->attr.attr.mode = secure ? 0400 : 0444;
pp->attr.size = secure ? 0 : pp->length;
pp->attr.read = of_node_property_read;
pp->attr.read_new = of_node_property_read;
rc = sysfs_create_bin_file(&np->kobj, &pp->attr);
WARN(rc, "error adding attribute %s to node %pOF\n", pp->name, np);