Commit 85919584 authored by Dan Carpenter's avatar Dan Carpenter Committed by Greg Kroah-Hartman

HID: roccat: prevent an out of bounds read in kovaplus_profile_activated()


[ Upstream commit 7ad81482 ]

We get the "new_profile_index" value from the mouse device when we're
handling raw events.  Smatch taints it as untrusted data and complains
that we need a bounds check.  This seems like a reasonable warning
otherwise there is a small read beyond the end of the array.

Fixes: 0e70f97f ("HID: roccat: Add support for Kova[+] mouse")
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Acked-by: default avatarSilvan Jegen <s.jegen@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6a5505da
......@@ -37,6 +37,8 @@ static uint kovaplus_convert_event_cpi(uint value)
static void kovaplus_profile_activated(struct kovaplus_device *kovaplus,
uint new_profile_index)
{
if (new_profile_index >= ARRAY_SIZE(kovaplus->profile_settings))
return;
kovaplus->actual_profile = new_profile_index;
kovaplus->actual_cpi = kovaplus->profile_settings[new_profile_index].cpi_startup_level;
kovaplus->actual_x_sensitivity = kovaplus->profile_settings[new_profile_index].sensitivity_x;
......
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