From 875b4e3763dbc941f15143dd1a18d10bb0be303b Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 28 Aug 2013 22:31:28 +0200 Subject: HID: ntrig: validate feature report details A HID device could send a malicious feature report that would cause the ntrig HID driver to trigger a NULL dereference during initialization: [57383.031190] usb 3-1: New USB device found, idVendor=1b96, idProduct=0001 ... [57383.315193] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 [57383.315308] IP: [] ntrig_probe+0x25e/0x420 [hid_ntrig] CVE-2013-2896 Signed-off-by: Kees Cook Cc: stable@kernel.org Signed-off-by: Rafi Rubin Signed-off-by: Jiri Kosina --- drivers/hid/hid-ntrig.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/hid') diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c index 98d1fdf7d8c..600f2075512 100644 --- a/drivers/hid/hid-ntrig.c +++ b/drivers/hid/hid-ntrig.c @@ -115,7 +115,8 @@ static inline int ntrig_get_mode(struct hid_device *hdev) struct hid_report *report = hdev->report_enum[HID_FEATURE_REPORT]. report_id_hash[0x0d]; - if (!report) + if (!report || report->maxfield < 1 || + report->field[0]->report_count < 1) return -EINVAL; hid_hw_request(hdev, report, HID_REQ_GET_REPORT); -- cgit v1.2.3