There are a few very theoretical off-by-one bugs in report descriptor size
checking when performing a pre-parsing fixup. Fix those.
Cc: sta...@vger.kernel.org
Reported-by: Ben Hawkes <haw...@google.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoi...@redhat.com>
Signed-off-by: Jiri Kosina <jkos...@suse.cz>
---
drivers/hid/hid-cherry.c | 2 +-
drivers/hid/hid-kye.c | 2 +-
drivers/hid/hid-lg.c | 4 ++--
drivers/hid/hid-monterey.c | 2 +-
drivers/hid/hid-petalynx.c | 2 +-
drivers/hid/hid-sunplus.c | 2 +-
6 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/hid/hid-cherry.c b/drivers/hid/hid-cherry.c
index 1bdcccc..f745d2c 100644
--- a/drivers/hid/hid-cherry.c
+++ b/drivers/hid/hid-cherry.c
@@ -28,7 +28,7 @@
static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
- if (*rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
+ if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");
rdesc[11] = rdesc[16] = 0xff;
rdesc[12] = rdesc[17] = 0x03;
diff --git a/drivers/hid/hid-kye.c b/drivers/hid/hid-kye.c
index e776963..b92bf01 100644
--- a/drivers/hid/hid-kye.c
+++ b/drivers/hid/hid-kye.c
@@ -300,7 +300,7 @@ static __u8 *kye_report_fixup(struct hid_device *hdev, __u8
*rdesc,
* - change the button usage range to 4-7 for the extra
* buttons
*/
- if (*rsize >= 74 &&
+ if (*rsize >= 75 &&
rdesc[61] == 0x05 && rdesc[62] == 0x08 &&
rdesc[63] == 0x19 && rdesc[64] == 0x08 &&
rdesc[65] == 0x29 && rdesc[66] == 0x0f &&
diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index a976f48..f91ff14 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -345,14 +345,14 @@ static __u8 *lg_report_fixup(struct hid_device *hdev,
__u8 *rdesc,
struct usb_device_descriptor *udesc;
__u16 bcdDevice, rev_maj, rev_min;
- if ((drv_data->quirks & LG_RDESC) && *rsize >= 90 && rdesc[83] == 0x26
&&
+ if ((drv_data->quirks & LG_RDESC) && *rsize >= 91 && rdesc[83] == 0x26
&&
rdesc[84] == 0x8c && rdesc[85] == 0x02) {
hid_info(hdev,
"fixing up Logitech keyboard report descriptor\n");
rdesc[84] = rdesc[89] = 0x4d;
rdesc[85] = rdesc[90] = 0x10;
}
- if ((drv_data->quirks & LG_RDESC_REL_ABS) && *rsize >= 50 &&
+ if ((drv_data->quirks & LG_RDESC_REL_ABS) && *rsize >= 51 &&
rdesc[32] == 0x81 && rdesc[33] == 0x06 &&
rdesc[49] == 0x81 && rdesc[50] == 0x06) {
hid_info(hdev,
diff --git a/drivers/hid/hid-monterey.c b/drivers/hid/hid-monterey.c
index 9e14c00..25daf28 100644
--- a/drivers/hid/hid-monterey.c
+++ b/drivers/hid/hid-monterey.c
@@ -24,7 +24,7 @@
static __u8 *mr_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
- if (*rsize >= 30 && rdesc[29] == 0x05 && rdesc[30] == 0x09) {
+ if (*rsize >= 31 && rdesc[29] == 0x05 && rdesc[30] == 0x09) {
hid_info(hdev, "fixing up button/consumer in HID report
descriptor\n");
rdesc[30] = 0x0c;
}
diff --git a/drivers/hid/hid-petalynx.c b/drivers/hid/hid-petalynx.c
index 736b250..6aca4f2 100644
--- a/drivers/hid/hid-petalynx.c
+++ b/drivers/hid/hid-petalynx.c
@@ -25,7 +25,7 @@
static __u8 *pl_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
- if (*rsize >= 60 && rdesc[39] == 0x2a && rdesc[40] == 0xf5 &&
+ if (*rsize >= 62 && rdesc[39] == 0x2a && rdesc[40] == 0xf5 &&
rdesc[41] == 0x00 && rdesc[59] == 0x26 &&
rdesc[60] == 0xf9 && rdesc[61] == 0x00) {
hid_info(hdev, "fixing up Petalynx Maxter Remote report
descriptor\n");
diff --git a/drivers/hid/hid-sunplus.c b/drivers/hid/hid-sunplus.c
index 87fc91e..91072fa 100644
--- a/drivers/hid/hid-sunplus.c
+++ b/drivers/hid/hid-sunplus.c
@@ -24,7 +24,7 @@
static __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
- if (*rsize >= 107 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
+ if (*rsize >= 112 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
rdesc[106] == 0x03) {
hid_info(hdev, "fixing up Sunplus Wireless Desktop report
descriptor\n");
rdesc[105] = rdesc[110] = 0x03;
--
Jiri Kosina
SUSE Labs
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