[PATCH 1/1] HID: hid-logitech-dj: Out of bound by one bug
From: Nestor Lopez Casado <hidden>
Date: 2011-09-20 13:59:10
Also in:
lkml
Subsystem:
hid core layer, hid logitech drivers, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds
There is a bug where a device with index 6 would write out of bounds in
the array of paired devices.
This patch fixes that problem.
Reported-by: Dan Carpenter <redacted>
Reviewed-by: Benjamin Tissoires <redacted>
Reviewed-by: Olivier Gay <redacted>
Signed-off-by: Nestor Lopez Casado <redacted>
---
Hi Jiri, Dan,
Many thanks to Dan for reporting that bug. We increased the array size by one.
Cheers,
Nestor
drivers/hid/hid-logitech-dj.c | 5 +----
drivers/hid/hid-logitech-dj.h | 5 ++++-
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index 5bb6f42..38b12e4 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c@@ -179,9 +179,6 @@ static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = { #define LOGITECH_DJ_INTERFACE_NUMBER 0x02 -#define DJ_DEVICE_INDEX_MIN 1 -#define DJ_DEVICE_INDEX_MAX 6 - static struct hid_ll_driver logi_dj_ll_driver; static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf,
@@ -823,7 +820,7 @@ static void logi_dj_remove(struct hid_device *hdev) * have finished and no more raw_event callbacks should arrive after * the remove callback was triggered so no locks are put around the * code below */ - for (i = 0; i < DJ_MAX_PAIRED_DEVICES; i++) { + for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { dj_dev = djrcv_dev->paired_dj_devices[i]; if (dj_dev != NULL) { hid_destroy_device(dj_dev->hdev);
diff --git a/drivers/hid/hid-logitech-dj.h b/drivers/hid/hid-logitech-dj.h
index 5982263..fd28a5e 100644
--- a/drivers/hid/hid-logitech-dj.h
+++ b/drivers/hid/hid-logitech-dj.h@@ -27,6 +27,8 @@ #define DJ_MAX_PAIRED_DEVICES 6 #define DJ_MAX_NUMBER_NOTIFICATIONS 8 +#define DJ_DEVICE_INDEX_MIN 1 +#define DJ_DEVICE_INDEX_MAX 6 #define DJREPORT_SHORT_LENGTH 15 #define DJREPORT_LONG_LENGTH 32
@@ -94,7 +96,8 @@ struct dj_report { struct dj_receiver_dev { struct hid_device *hdev; - struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES]; + struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES + + DJ_DEVICE_INDEX_MIN]; struct work_struct work; struct kfifo notif_fifo; spinlock_t lock;
--
1.7.5.3