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authorDan Carpenter <dan.carpenter@oracle.com>2015-01-09 15:32:31 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-16 06:59:01 -0800
commit94bb429ef60ffe198fbd250ce852d57d06fd02e4 (patch)
tree9a933ce36b0bee62e924cae74c0a9b2c23503d67 /drivers
parent32b57c08f4cca3bf821606a2f598fc397a143127 (diff)
HID: roccat: potential out of bounds in pyra_sysfs_write_settings()
commit 606185b20caf4c57d7e41e5a5ea4aff460aef2ab upstream. This is a static checker fix. We write some binary settings to the sysfs file. One of the settings is the "->startup_profile". There isn't any checking to make sure it fits into the pyra->profile_settings[] array in the profile_activated() function. I added a check to pyra_sysfs_write_settings() in both places because I wasn't positive that the other callers were correct. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hid/hid-roccat-pyra.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/hid/hid-roccat-pyra.c b/drivers/hid/hid-roccat-pyra.c
index d4f1e3bee590..264ddc4a0118 100644
--- a/drivers/hid/hid-roccat-pyra.c
+++ b/drivers/hid/hid-roccat-pyra.c
@@ -35,6 +35,8 @@ static struct class *pyra_class;
static void profile_activated(struct pyra_device *pyra,
unsigned int new_profile)
{
+ if (new_profile >= ARRAY_SIZE(pyra->profile_settings))
+ return;
pyra->actual_profile = new_profile;
pyra->actual_cpi = pyra->profile_settings[pyra->actual_profile].y_cpi;
}
@@ -236,9 +238,11 @@ static ssize_t pyra_sysfs_write_settings(struct file *fp,
if (off != 0 || count != PYRA_SIZE_SETTINGS)
return -EINVAL;
- mutex_lock(&pyra->pyra_lock);
-
settings = (struct pyra_settings const *)buf;
+ if (settings->startup_profile >= ARRAY_SIZE(pyra->profile_settings))
+ return -EINVAL;
+
+ mutex_lock(&pyra->pyra_lock);
retval = pyra_set_settings(usb_dev, settings);
if (retval) {