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authorDan Carpenter <dan.carpenter@oracle.com>2018-01-10 12:39:03 +0300
committerJiri Kosina <jkosina@suse.cz>2018-01-23 15:46:58 +0100
commit7ad81482cad67cbe1ec808490d1ddfc420c42008 (patch)
tree0224b26501aa50635630d3300382025ae63e1e97 /drivers
parent7cb4774e2d3282d29edd00762167876a27cc7d2a (diff)
HID: roccat: prevent an out of bounds read in kovaplus_profile_activated()
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: 0e70f97f257e ("HID: roccat: Add support for Kova[+] mouse") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Silvan Jegen <s.jegen@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hid/hid-roccat-kovaplus.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hid/hid-roccat-kovaplus.c b/drivers/hid/hid-roccat-kovaplus.c
index 43617fb28b87..317c9c2c0a7c 100644
--- a/drivers/hid/hid-roccat-kovaplus.c
+++ b/drivers/hid/hid-roccat-kovaplus.c
@@ -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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