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authorJean Delvare <khali@linux-fr.org>2007-11-15 19:24:03 +0100
committerJean Delvare <khali@hyperion.delvare>2007-11-15 19:24:03 +0100
commit0f2cbd38aa377e30df3b7602abed69464d1970aa (patch)
tree8002385cdbedf5462b46b33d9a6310a7218c2961
parentbe8a1f7cd4501c3b4b32543577a33aee6d2193ac (diff)
downloadlinux-stericsson-0f2cbd38aa377e30df3b7602abed69464d1970aa.tar.gz
i2c/eeprom: Hide Sony Vaio serial numbers
The sysfs interface to DMI data takes care to not make the system serial number and UUID world-readable, presumably due to privacy concerns. For consistency, we should not let the eeprom driver export these same strings to the world on Sony Vaio laptops. Instead, only make them readable by root, as we already do for BIOS passwords. Signed-off-by: Jean Delvare <khali@linux-fr.org>
-rw-r--r--drivers/i2c/chips/eeprom.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/i2c/chips/eeprom.c b/drivers/i2c/chips/eeprom.c
index d3da1fb05b9b..ef8a754db1db 100644
--- a/drivers/i2c/chips/eeprom.c
+++ b/drivers/i2c/chips/eeprom.c
@@ -128,13 +128,20 @@ static ssize_t eeprom_read(struct kobject *kobj, struct bin_attribute *bin_attr,
for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++)
eeprom_update_client(client, slice);
- /* Hide Vaio security settings to regular users (16 first bytes) */
- if (data->nature == VAIO && off < 16 && !capable(CAP_SYS_ADMIN)) {
- size_t in_row1 = 16 - off;
- in_row1 = min(in_row1, count);
- memset(buf, 0, in_row1);
- if (count - in_row1 > 0)
- memcpy(buf + in_row1, &data->data[16], count - in_row1);
+ /* Hide Vaio private settings to regular users:
+ - BIOS passwords: bytes 0x00 to 0x0f
+ - UUID: bytes 0x10 to 0x1f
+ - Serial number: 0xc0 to 0xdf */
+ if (data->nature == VAIO && !capable(CAP_SYS_ADMIN)) {
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if ((off + i <= 0x1f) ||
+ (off + i >= 0xc0 && off + i <= 0xdf))
+ buf[i] = 0;
+ else
+ buf[i] = data->data[off + i];
+ }
} else {
memcpy(buf, &data->data[off], count);
}
@@ -204,7 +211,7 @@ static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind)
&& i2c_smbus_read_byte(new_client) == 'G'
&& i2c_smbus_read_byte(new_client) == '-') {
dev_info(&new_client->dev, "Vaio EEPROM detected, "
- "enabling password protection\n");
+ "enabling privacy protection\n");
data->nature = VAIO;
}
}