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| author | khali@linux-fr.org <khali@linux-fr.org> | 2005-05-06 09:18:36 -0700 |
|---|---|---|
| committer | Greg KH <gregkh@suse.de> | 2005-05-12 10:00:24 -0700 |
| commit | 378856d119a322318c4f5b7d1087e4d7a743401e (patch) | |
| tree | f38f47b52fbdaaf39811e2f6fea0585a6e4fd666 | |
| parent | 5d6a280364977f262eee6db305b5059bbd2820e6 (diff) | |
| download | linux-stable-378856d119a322318c4f5b7d1087e4d7a743401e.tar.gz linux-stable-378856d119a322318c4f5b7d1087e4d7a743401e.tar.bz2 linux-stable-378856d119a322318c4f5b7d1087e4d7a743401e.zip | |
[PATCH] I2C: Fix incorrect sysfs file permissions in it87 and via686a drivers
The it87 and via686a hardware monitoring drivers each create a sysfs
file named "alarms" in R/W mode, while they should really create it in
read-only mode. Since we don't provide a store function for these files,
write attempts to these files will do something undefined (I guess) and
bad (I am sure). My own try resulted in a locked terminal (where I
attempted the write) and a 100% CPU load until next reboot.
As a side note, wouldn't it make sense to check, when creating sysfs
files, that readable files have a non-NULL show method, and writable
files have a non-NULL store method? I know drivers are not supposed to
do stupid things, but there is already a BUG_ON for several conditions
in sysfs_create_file, so maybe we could add two more?
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/i2c/chips/it87.c | 2 | ||||
| -rw-r--r-- | drivers/i2c/chips/via686a.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/chips/it87.c b/drivers/i2c/chips/it87.c index 8988f4fa9169..bf91307a0bb2 100644 --- a/drivers/i2c/chips/it87.c +++ b/drivers/i2c/chips/it87.c @@ -631,7 +631,7 @@ static ssize_t show_alarms(struct device *dev, char *buf) struct it87_data *data = it87_update_device(dev); return sprintf(buf,"%d\n", ALARMS_FROM_REG(data->alarms)); } -static DEVICE_ATTR(alarms, S_IRUGO | S_IWUSR, show_alarms, NULL); +static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); static ssize_t show_vrm_reg(struct device *dev, char *buf) diff --git a/drivers/i2c/chips/via686a.c b/drivers/i2c/chips/via686a.c index cacc2578fa04..a49dc222b721 100644 --- a/drivers/i2c/chips/via686a.c +++ b/drivers/i2c/chips/via686a.c @@ -554,7 +554,7 @@ static ssize_t show_alarms(struct device *dev, char *buf) { struct via686a_data *data = via686a_update_device(dev); return sprintf(buf,"%d\n", ALARMS_FROM_REG(data->alarms)); } -static DEVICE_ATTR(alarms, S_IRUGO | S_IWUSR, show_alarms, NULL); +static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); /* The driver. I choose to use type i2c_driver, as at is identical to both smbus_driver and isa_driver, and clients could be of either kind */ |