diff options
| author |   Peter Wu <peter@lekensteyn.nl> | 2014-12-11 13:51:19 +0100 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2014-12-11 23:10:00 +0100 |
| commit | 3a034a7a7d61c30809255c1fc27d47d52c8c1bb6 (patch) | |
| tree | 0d86115c4a291314da2f6ddb52521cba9c782d43 | |
| parent | HID: logitech-hidpp: check name retrieval return code (diff) | |
| download | linux-dev-3a034a7a7d61c30809255c1fc27d47d52c8c1bb6.tar.xz linux-dev-3a034a7a7d61c30809255c1fc27d47d52c8c1bb6.zip | |
HID: logitech-hidpp: add boundary check for name retrieval
The HID response has a limited size. Do not trust the value returned by
hardware, check that it really fits in the message.
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/hid-logitech-hidpp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 4d72c20fa233..4292cc33c119 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -313,6 +313,9 @@ static char *hidpp_get_unifying_name(struct hidpp_device *hidpp_dev) len = response.rap.params[1]; + if (2 + len > sizeof(response.rap.params)) + return NULL; + name = kzalloc(len + 1, GFP_KERNEL); if (!name) return NULL; |