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ACPI: sysfs: 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://patch.msgid.link/20241202-sysfs-const-bin_attr-acpi-v1-3-78f3b38d350d@weissschuh.net
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Thomas Weißschuh 2024-12-02 20:04:11 +01:00 committed by Rafael J. Wysocki
parent d16d7e91ed
commit 7349678b84
1 changed files with 4 additions and 4 deletions
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8
drivers/acpi/sysfs.c
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@ -319,7 +319,7 @@ struct acpi_data_attr {
};
static ssize_t acpi_table_show(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 acpi_table_attr *table_attr =
@ -372,7 +372,7 @@ static int acpi_table_attr_init(struct kobject *tables_obj,
}
table_attr->attr.size = table_header->length;
table_attr->attr.read = acpi_table_show;
table_attr->attr.read_new = acpi_table_show;
table_attr->attr.attr.name = table_attr->filename;
table_attr->attr.attr.mode = 0400;
@ -412,7 +412,7 @@ acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
}
static ssize_t acpi_data_show(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 acpi_data_attr *data_attr;
@ -495,7 +495,7 @@ static int acpi_table_data_init(struct acpi_table_header *th)
if (!data_attr)
return -ENOMEM;
sysfs_attr_init(&data_attr->attr.attr);
data_attr->attr.read = acpi_data_show;
data_attr->attr.read_new = acpi_data_show;
data_attr->attr.attr.mode = 0400;
return acpi_data_objs[i].fn(th, data_attr);
}