This is a note to let you know that I've just added the patch titled
HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-hiddev-validate-num_values-for-hidiocgusages-hidiocsusages-commands.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 93a2001bdfd5376c3dc2158653034c20392d15c5 Mon Sep 17 00:00:00 2001
From: Scott Bauer <sbauer@xxxxxxxxxxxxxx>
Date: Thu, 23 Jun 2016 08:59:47 -0600
Subject: HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands
From: Scott Bauer <sbauer@xxxxxxxxxxxxxx>
commit 93a2001bdfd5376c3dc2158653034c20392d15c5 upstream.
This patch validates the num_values parameter from userland during the
HIDIOCGUSAGES and HIDIOCSUSAGES commands. Previously, if the report id was set
to HID_REPORT_ID_UNKNOWN, we would fail to validate the num_values parameter
leading to a heap overflow.
Signed-off-by: Scott Bauer <sbauer@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/usbhid/hiddev.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -516,13 +516,13 @@ static noinline int hiddev_ioctl_usage(s
goto inval;
} else if (uref->usage_index >= field->report_count)
goto inval;
-
- else if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) &&
- (uref_multi->num_values > HID_MAX_MULTI_USAGES ||
- uref->usage_index + uref_multi->num_values > field->report_count))
- goto inval;
}
+ if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) &&
+ (uref_multi->num_values > HID_MAX_MULTI_USAGES ||
+ uref->usage_index + uref_multi->num_values > field->report_count))
+ goto inval;
+
switch (cmd) {
case HIDIOCGUSAGE:
uref->value = field->value[uref->usage_index];
Patches currently in stable-queue which might be from sbauer@xxxxxxxxxxxxxx are
queue-3.14/hid-hiddev-validate-num_values-for-hidiocgusages-hidiocsusages-commands.patch
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