This is a note to let you know that I've just added the patch titled
HID: steam: Prevent NULL pointer dereference in steam_{recv,send}_report
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-steam-prevent-null-pointer-dereference-in-steam_-recv-send-_report.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cd11d1a6114bd4bc6450ae59f6e110ec47362126 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@xxxxxxxxxx>
Date: Fri, 8 Jul 2022 08:40:09 +0100
Subject: HID: steam: Prevent NULL pointer dereference in steam_{recv,send}_report
From: Lee Jones <lee.jones@xxxxxxxxxx>
commit cd11d1a6114bd4bc6450ae59f6e110ec47362126 upstream.
It is possible for a malicious device to forgo submitting a Feature
Report. The HID Steam driver presently makes no prevision for this
and de-references the 'struct hid_report' pointer obtained from the
HID devices without first checking its validity. Let's change that.
Cc: Jiri Kosina <jikos@xxxxxxxxxx>
Cc: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Cc: linux-input@xxxxxxxxxxxxxxx
Fixes: c164d6abf3841 ("HID: add driver for Valve Steam Controller")
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-steam.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/drivers/hid/hid-steam.c
+++ b/drivers/hid/hid-steam.c
@@ -134,6 +134,11 @@ static int steam_recv_report(struct stea
int ret;
r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0];
+ if (!r) {
+ hid_err(steam->hdev, "No HID_FEATURE_REPORT submitted - nothing to read\n");
+ return -EINVAL;
+ }
+
if (hid_report_len(r) < 64)
return -EINVAL;
@@ -165,6 +170,11 @@ static int steam_send_report(struct stea
int ret;
r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0];
+ if (!r) {
+ hid_err(steam->hdev, "No HID_FEATURE_REPORT submitted - nothing to read\n");
+ return -EINVAL;
+ }
+
if (hid_report_len(r) < 64)
return -EINVAL;
Patches currently in stable-queue which might be from lee.jones@xxxxxxxxxx are
queue-5.10/hid-steam-prevent-null-pointer-dereference-in-steam_-recv-send-_report.patch
