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authorJohan Hovold <johan@kernel.org>2021-05-17 13:04:30 +0300
committerJiri Kosina <jkosina@suse.cz>2021-05-27 16:40:35 +0300
commit4b4f6cecca446abcb686c6e6c451d4f1ec1a7497 (patch)
tree43e7527141c338325a6c31c2fbfcaa0e8f34e066 /drivers/hid/hid-magicmouse.c
parent22db5e0003e1441cd829180cebb42f7a6b7a46b7 (diff)
downloadlinux-4b4f6cecca446abcb686c6e6c451d4f1ec1a7497.tar.xz
HID: magicmouse: fix NULL-deref on disconnect
Commit 9d7b18668956 ("HID: magicmouse: add support for Apple Magic Trackpad 2") added a sanity check for an Apple trackpad but returned success instead of -ENODEV when the check failed. This means that the remove callback will dereference the never-initialised driver data pointer when the driver is later unbound (e.g. on USB disconnect). Reported-by: syzbot+ee6f6e2e68886ca256a8@syzkaller.appspotmail.com Fixes: 9d7b18668956 ("HID: magicmouse: add support for Apple Magic Trackpad 2") Cc: stable@vger.kernel.org # 4.20 Cc: Claudio Mettler <claudio@ponyfleisch.ch> Cc: Marek Wyborski <marek.wyborski@emwesoft.com> Cc: Sean O'Brien <seobrien@chromium.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-magicmouse.c')
-rw-r--r--drivers/hid/hid-magicmouse.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 097870e43cfe..8bcaee4ccae0 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -693,7 +693,7 @@ static int magicmouse_probe(struct hid_device *hdev,
if (id->vendor == USB_VENDOR_ID_APPLE &&
id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
hdev->type != HID_TYPE_USBMOUSE)
- return 0;
+ return -ENODEV;
msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
if (msc == NULL) {