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Date: Thu, 14 Nov 2019 19:03:01 +0100
From: Marco Elver <elver@...gle.com>
To: elver@...gle.com
Cc: akiyks@...il.com, stern@...land.harvard.edu, glider@...gle.com,
parri.andrea@...il.com, andreyknvl@...gle.com, luto@...nel.org,
ard.biesheuvel@...aro.org, arnd@...db.de, boqun.feng@...il.com,
bp@...en8.de, dja@...ens.net, dlustig@...dia.com,
dave.hansen@...ux.intel.com, dhowells@...hat.com,
dvyukov@...gle.com, hpa@...or.com, mingo@...hat.com,
j.alglave@....ac.uk, joel@...lfernandes.org, corbet@....net,
jpoimboe@...hat.com, luc.maranget@...ia.fr, mark.rutland@....com,
npiggin@...il.com, paulmck@...nel.org, peterz@...radead.org,
tglx@...utronix.de, will@...nel.org, edumazet@...gle.com,
kasan-dev@...glegroups.com, linux-arch@...r.kernel.org,
linux-doc@...r.kernel.org, linux-efi@...r.kernel.org,
linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, x86@...nel.org
Subject: [PATCH v4 08/10] asm-generic, kcsan: Add KCSAN instrumentation for bitops
Add explicit KCSAN checks for bitops.
Signed-off-by: Marco Elver <elver@...gle.com>
Acked-by: Paul E. McKenney <paulmck@...nel.org>
---
v2:
* Use kcsan_check{,_atomic}_{read,write} instead of
kcsan_check_{access,atomic}.
---
include/asm-generic/bitops-instrumented.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/include/asm-generic/bitops-instrumented.h b/include/asm-generic/bitops-instrumented.h
index ddd1c6d9d8db..864d707cdb87 100644
--- a/include/asm-generic/bitops-instrumented.h
+++ b/include/asm-generic/bitops-instrumented.h
@@ -12,6 +12,7 @@
#define _ASM_GENERIC_BITOPS_INSTRUMENTED_H
#include <linux/kasan-checks.h>
+#include <linux/kcsan-checks.h>
/**
* set_bit - Atomically set a bit in memory
@@ -26,6 +27,7 @@
static inline void set_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
arch_set_bit(nr, addr);
}
@@ -41,6 +43,7 @@ static inline void set_bit(long nr, volatile unsigned long *addr)
static inline void __set_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
arch___set_bit(nr, addr);
}
@@ -54,6 +57,7 @@ static inline void __set_bit(long nr, volatile unsigned long *addr)
static inline void clear_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
arch_clear_bit(nr, addr);
}
@@ -69,6 +73,7 @@ static inline void clear_bit(long nr, volatile unsigned long *addr)
static inline void __clear_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
arch___clear_bit(nr, addr);
}
@@ -82,6 +87,7 @@ static inline void __clear_bit(long nr, volatile unsigned long *addr)
static inline void clear_bit_unlock(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
arch_clear_bit_unlock(nr, addr);
}
@@ -97,6 +103,7 @@ static inline void clear_bit_unlock(long nr, volatile unsigned long *addr)
static inline void __clear_bit_unlock(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
arch___clear_bit_unlock(nr, addr);
}
@@ -113,6 +120,7 @@ static inline void __clear_bit_unlock(long nr, volatile unsigned long *addr)
static inline void change_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
arch_change_bit(nr, addr);
}
@@ -128,6 +136,7 @@ static inline void change_bit(long nr, volatile unsigned long *addr)
static inline void __change_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
arch___change_bit(nr, addr);
}
@@ -141,6 +150,7 @@ static inline void __change_bit(long nr, volatile unsigned long *addr)
static inline bool test_and_set_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
return arch_test_and_set_bit(nr, addr);
}
@@ -155,6 +165,7 @@ static inline bool test_and_set_bit(long nr, volatile unsigned long *addr)
static inline bool __test_and_set_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
return arch___test_and_set_bit(nr, addr);
}
@@ -170,6 +181,7 @@ static inline bool __test_and_set_bit(long nr, volatile unsigned long *addr)
static inline bool test_and_set_bit_lock(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
return arch_test_and_set_bit_lock(nr, addr);
}
@@ -183,6 +195,7 @@ static inline bool test_and_set_bit_lock(long nr, volatile unsigned long *addr)
static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
return arch_test_and_clear_bit(nr, addr);
}
@@ -197,6 +210,7 @@ static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)
static inline bool __test_and_clear_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
return arch___test_and_clear_bit(nr, addr);
}
@@ -210,6 +224,7 @@ static inline bool __test_and_clear_bit(long nr, volatile unsigned long *addr)
static inline bool test_and_change_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
return arch_test_and_change_bit(nr, addr);
}
@@ -224,6 +239,7 @@ static inline bool test_and_change_bit(long nr, volatile unsigned long *addr)
static inline bool __test_and_change_bit(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_write(addr + BIT_WORD(nr), sizeof(long));
return arch___test_and_change_bit(nr, addr);
}
@@ -235,6 +251,7 @@ static inline bool __test_and_change_bit(long nr, volatile unsigned long *addr)
static inline bool test_bit(long nr, const volatile unsigned long *addr)
{
kasan_check_read(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_read(addr + BIT_WORD(nr), sizeof(long));
return arch_test_bit(nr, addr);
}
@@ -254,6 +271,7 @@ static inline bool
clear_bit_unlock_is_negative_byte(long nr, volatile unsigned long *addr)
{
kasan_check_write(addr + BIT_WORD(nr), sizeof(long));
+ kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long));
return arch_clear_bit_unlock_is_negative_byte(nr, addr);
}
/* Let everybody know we have it. */
--
2.24.0.rc1.363.gb1bccd3e3d-goog
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