From: Colin King <colin.king@canonical.com>
To: "Roderick Colenbrander" <roderick.colenbrander@sony.com>,
"Jiri Kosina" <jikos@kernel.org>,
"Benjamin Tissoires" <benjamin.tissoires@redhat.com>,
"Barnabás Pőcze" <pobrn@protonmail.com>,
linux-input@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH][next] HID: playstation: fix array size comparison (off-by-one)
Date: Mon, 15 Feb 2021 16:39:21 +0000 [thread overview]
Message-ID: <20210215163921.84283-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
The comparison of value with the array size ps_gamepad_hat_mapping
appears to be off-by-one. Fix this by using >= rather than > for the
size comparison.
Addresses-Coverity: ("Out-of-bounds read")
Fixes: bc2e15a9a022 ("HID: playstation: initial DualSense USB support.")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/hid/hid-playstation.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index 408b651174cf..568a3a067c88 100644
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -1064,7 +1064,7 @@ static int dualsense_parse_report(struct ps_device *ps_dev, struct hid_report *r
input_report_abs(ds->gamepad, ABS_RZ, ds_report->rz);
value = ds_report->buttons[0] & DS_BUTTONS0_HAT_SWITCH;
- if (value > ARRAY_SIZE(ps_gamepad_hat_mapping))
+ if (value >= ARRAY_SIZE(ps_gamepad_hat_mapping))
value = 8; /* center */
input_report_abs(ds->gamepad, ABS_HAT0X, ps_gamepad_hat_mapping[value].x);
input_report_abs(ds->gamepad, ABS_HAT0Y, ps_gamepad_hat_mapping[value].y);
--
2.30.0
next reply other threads:[~2021-02-15 16:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-15 16:39 Colin King [this message]
2021-02-17 20:04 ` [PATCH][next] HID: playstation: fix array size comparison (off-by-one) Benjamin Tissoires
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