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Build fixup patch from kees

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Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>
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Justin M. Forbes 2021-11-16 15:45:29 -06:00
parent 571441fd91
commit 77b569a143
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1 changed files with 69 additions and 0 deletions
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patch-5.16-redhat.patch
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@ -3046,3 +3046,72 @@ index c88167a414b4..e65a178ff9f4 100644
#ifdef CONFIG_PERF_EVENTS
int security_perf_event_open(struct perf_event_attr *attr, int type)
{
From 308661b9e60dedfff8ee23bec8127680c4d7b670 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Mon, 15 Nov 2021 16:41:11 -0800
Subject: [PATCH] kasan: test: Silence intentional read overflow warnings
As done in commit d73dad4eb5ad ("kasan: test: bypass __alloc_size checks")
for __write_overflow warnings, also silence some more cases that trip
the __read_overflow warnings seen in 5.16-rc1[1]:
In file included from /kisskb/src/include/linux/string.h:253,
from /kisskb/src/include/linux/bitmap.h:10,
from /kisskb/src/include/linux/cpumask.h:12,
from /kisskb/src/include/linux/mm_types_task.h:14,
from /kisskb/src/include/linux/mm_types.h:5,
from /kisskb/src/include/linux/page-flags.h:13,
from /kisskb/src/arch/arm64/include/asm/mte.h:14,
from /kisskb/src/arch/arm64/include/asm/pgtable.h:12,
from /kisskb/src/include/linux/pgtable.h:6,
from /kisskb/src/include/linux/kasan.h:29,
from /kisskb/src/lib/test_kasan.c:10:
In function 'memcmp',
inlined from 'kasan_memcmp' at /kisskb/src/lib/test_kasan.c:897:2:
/kisskb/src/include/linux/fortify-string.h:263:25: error: call to '__read_overflow' declared with attribute error: detected read beyond size of object (1st parameter)
263 | __read_overflow();
| ^~~~~~~~~~~~~~~~~
In function 'memchr',
inlined from 'kasan_memchr' at /kisskb/src/lib/test_kasan.c:872:2:
/kisskb/src/include/linux/fortify-string.h:277:17: error: call to '__read_overflow' declared with attribute error: detected read beyond size of object (1st parameter)
277 | __read_overflow();
| ^~~~~~~~~~~~~~~~~
[1] http://kisskb.ellerman.id.au/kisskb/buildresult/14660585/log/
Cc: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: kasan-dev@googlegroups.com
Fixes: d73dad4eb5ad ("kasan: test: bypass __alloc_size checks")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
---
lib/test_kasan.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 67ed689a0b1b..0643573f8686 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -869,6 +869,7 @@ static void kasan_memchr(struct kunit *test)
ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ OPTIMIZER_HIDE_VAR(size);
KUNIT_EXPECT_KASAN_FAIL(test,
kasan_ptr_result = memchr(ptr, '1', size + 1));
@@ -894,6 +895,7 @@ static void kasan_memcmp(struct kunit *test)
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
memset(arr, 0, sizeof(arr));
+ OPTIMIZER_HIDE_VAR(size);
KUNIT_EXPECT_KASAN_FAIL(test,
kasan_int_result = memcmp(ptr, arr, size+1));
kfree(ptr);
--
2.33.1