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| author | Kees Cook <keescook@chromium.org> | 2013-08-28 22:31:28 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-09-04 12:00:23 +0200 |
| commit | 875b4e3763dbc941f15143dd1a18d10bb0be303b (patch) | |
| tree | a719b39cbcf5ff09b673b9232d0f4f772357e028 /drivers/hid/hid-ntrig.c | |
| parent | 412f30105ec6735224535791eed5cdc02888ecb4 (diff) | |
| download | lwn-875b4e3763dbc941f15143dd1a18d10bb0be303b.tar.gz lwn-875b4e3763dbc941f15143dd1a18d10bb0be303b.zip | |
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: [<ffffffffa08102de>] ntrig_probe+0x25e/0x420 [hid_ntrig]
CVE-2013-2896
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-ntrig.c')
| -rw-r--r-- | drivers/hid/hid-ntrig.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c index 98d1fdf7d8cd..600f2075512f 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); |