From cd6338e72336f073342df3b49a4d6cb7fb6cdbee Mon Sep 17 00:00:00 2001
From: Joe Lawrence <joe.lawrence@redhat.com>
Date: Tue, 26 Oct 2021 10:59:31 -0400
Subject: [KPATCH CVE-2021-0512] HID: kpatch fixes for CVE-2021-0512
Kernels:
4.18.0-305.el8
4.18.0-305.3.1.el8_4
4.18.0-305.7.1.el8_4
4.18.0-305.10.2.el8_4
4.18.0-305.12.1.el8_4
4.18.0-305.17.1.el8_4
4.18.0-305.19.1.el8_4
Changes since last build:
arches: x86_64 ppc64le
hid-core.o: changed function: hid_add_field
---------------------------
Kernels:
4.18.0-305.el8
4.18.0-305.3.1.el8_4
4.18.0-305.7.1.el8_4
4.18.0-305.10.2.el8_4
4.18.0-305.12.1.el8_4
4.18.0-305.17.1.el8_4
4.18.0-305.19.1.el8_4
Modifications: none
Kpatch-MR: https://gitlab.com/redhat/prdsc/rhel/src/kpatch/rhel-8/-/merge_requests/5
Approved-by: Artem Savkov (@artem.savkov)
Z-MR: https://gitlab.com/redhat/rhel/src/kernel/rhel-8/-/merge_requests/1350
KT0 test PASS: https://beaker.engineering.redhat.com/jobs/5942710
for kpatch-patch-4_18_0-305-1-6.el8 scratch build:
https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=40615898
commit 8ee375b059ce42c0c38f2593f76077d915eee89e
Author: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Tue Aug 17 09:26:20 2021 +0200
HID: make arrays usage and value to be the same
Bugzilla: https://bugzilla.redhat.com/1974941
CVE: CVE-2021-0512
Y-Commit: 87ed552fb937790a5d9439c179bb523cfb0efdc6
O-Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1974942
Upstream Status: since v5.12
Test: me on the hid-tools test suite
commit ed9be64eefe26d7d8b0b5b9fa3ffdf425d87a01f
Author: Will McVicker <willmcvicker@google.com>
Date: Sat Dec 5 00:48:48 2020 +0000
HID: make arrays usage and value to be the same
The HID subsystem allows an "HID report field" to have a different
number of "values" and "usages" when it is allocated. When a field
struct is created, the size of the usage array is guaranteed to be at
least as large as the values array, but it may be larger. This leads to
a potential out-of-bounds write in
__hidinput_change_resolution_multipliers() and an out-of-bounds read in
hidinput_count_leds().
To fix this, let's make sure that both the usage and value arrays are
the same size.
Cc: stable@vger.kernel.org
Signed-off-by: Will McVicker <willmcvicker@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Julio Faracco <jfaracco@redhat.com>
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
---
drivers/hid/hid-core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index d2ecc9c45255..263eca119ff0 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -90,7 +90,7 @@ EXPORT_SYMBOL_GPL(hid_register_report);
* Register a new field for this report.
*/
-static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
+static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages)
{
struct hid_field *field;
@@ -101,7 +101,7 @@ static struct hid_field *hid_register_field(struct hid_report *report, unsigned
field = kzalloc((sizeof(struct hid_field) +
usages * sizeof(struct hid_usage) +
- values * sizeof(unsigned)), GFP_KERNEL);
+ usages * sizeof(unsigned)), GFP_KERNEL);
if (!field)
return NULL;
@@ -300,7 +300,7 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
usages = max_t(unsigned, parser->local.usage_index,
parser->global.report_count);
- field = hid_register_field(report, usages, parser->global.report_count);
+ field = hid_register_field(report, usages);
if (!field)
return 0;
--
2.31.1