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-rw-r--r--arch/arm64/include/asm/uaccess.h4
-rw-r--r--arch/frv/include/asm/uaccess.h4
-rw-r--r--arch/m32r/include/asm/uaccess.h12
-rw-r--r--arch/microblaze/include/asm/uaccess.h6
-rw-r--r--arch/mn10300/include/asm/uaccess.h4
-rw-r--r--arch/powerpc/include/asm/uaccess.h16
-rw-r--r--arch/tile/include/asm/uaccess.h2
-rw-r--r--arch/x86/include/asm/uaccess_64.h2
-rw-r--r--include/asm-generic/uaccess.h10
-rw-r--r--include/linux/kernel.h7
-rw-r--r--mm/memory.c10
11 files changed, 39 insertions, 38 deletions
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index 008f8481da65..edb3d5c73a32 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -166,7 +166,7 @@ do { \
#define get_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) ? \
__get_user((x), (ptr)) : \
((x) = 0, -EFAULT); \
@@ -227,7 +227,7 @@ do { \
#define put_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) ? \
__put_user((x), (ptr)) : \
-EFAULT; \
diff --git a/arch/frv/include/asm/uaccess.h b/arch/frv/include/asm/uaccess.h
index 0b67ec5b4414..3ac9a59d65d4 100644
--- a/arch/frv/include/asm/uaccess.h
+++ b/arch/frv/include/asm/uaccess.h
@@ -280,14 +280,14 @@ extern long __memcpy_user(void *dst, const void *src, unsigned long count);
static inline unsigned long __must_check
__copy_to_user(void __user *to, const void *from, unsigned long n)
{
- might_sleep();
+ might_fault();
return __copy_to_user_inatomic(to, from, n);
}
static inline unsigned long
__copy_from_user(void *to, const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
return __copy_from_user_inatomic(to, from, n);
}
diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h
index 1c7047bea200..84fe7ba53035 100644
--- a/arch/m32r/include/asm/uaccess.h
+++ b/arch/m32r/include/asm/uaccess.h
@@ -216,7 +216,7 @@ extern int fixup_exception(struct pt_regs *regs);
({ \
long __gu_err = 0; \
unsigned long __gu_val; \
- might_sleep(); \
+ might_fault(); \
__get_user_size(__gu_val,(ptr),(size),__gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
@@ -227,7 +227,7 @@ extern int fixup_exception(struct pt_regs *regs);
long __gu_err = -EFAULT; \
unsigned long __gu_val = 0; \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
- might_sleep(); \
+ might_fault(); \
if (access_ok(VERIFY_READ,__gu_addr,size)) \
__get_user_size(__gu_val,__gu_addr,(size),__gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
@@ -295,7 +295,7 @@ do { \
#define __put_user_nocheck(x,ptr,size) \
({ \
long __pu_err; \
- might_sleep(); \
+ might_fault(); \
__put_user_size((x),(ptr),(size),__pu_err); \
__pu_err; \
})
@@ -305,7 +305,7 @@ do { \
({ \
long __pu_err = -EFAULT; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- might_sleep(); \
+ might_fault(); \
if (access_ok(VERIFY_WRITE,__pu_addr,size)) \
__put_user_size((x),__pu_addr,(size),__pu_err); \
__pu_err; \
@@ -597,7 +597,7 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
*/
#define copy_to_user(to,from,n) \
({ \
- might_sleep(); \
+ might_fault(); \
__generic_copy_to_user((to),(from),(n)); \
})
@@ -638,7 +638,7 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
*/
#define copy_from_user(to,from,n) \
({ \
- might_sleep(); \
+ might_fault(); \
__generic_copy_from_user((to),(from),(n)); \
})
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 04e49553bdf9..0aa005703a0b 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -145,7 +145,7 @@ static inline unsigned long __must_check __clear_user(void __user *to,
static inline unsigned long __must_check clear_user(void __user *to,
unsigned long n)
{
- might_sleep();
+ might_fault();
if (unlikely(!access_ok(VERIFY_WRITE, to, n)))
return n;
@@ -371,7 +371,7 @@ extern long __user_bad(void);
static inline long copy_from_user(void *to,
const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_READ, from, n))
return __copy_from_user(to, from, n);
return n;
@@ -385,7 +385,7 @@ static inline long copy_from_user(void *to,
static inline long copy_to_user(void __user *to,
const void *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_WRITE, to, n))
return __copy_to_user(to, from, n);
return n;
diff --git a/arch/mn10300/include/asm/uaccess.h b/arch/mn10300/include/asm/uaccess.h
index d7966e0f7698..537278746a15 100644
--- a/arch/mn10300/include/asm/uaccess.h
+++ b/arch/mn10300/include/asm/uaccess.h
@@ -471,13 +471,13 @@ extern unsigned long __generic_copy_from_user(void *, const void __user *,
#define __copy_to_user(to, from, n) \
({ \
- might_sleep(); \
+ might_fault(); \
__copy_to_user_inatomic((to), (from), (n)); \
})
#define __copy_from_user(to, from, n) \
({ \
- might_sleep(); \
+ might_fault(); \
__copy_from_user_inatomic((to), (from), (n)); \
})
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 4db49590acf5..9485b43a7c00 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -178,7 +178,7 @@ do { \
long __pu_err; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
if (!is_kernel_addr((unsigned long)__pu_addr)) \
- might_sleep(); \
+ might_fault(); \
__chk_user_ptr(ptr); \
__put_user_size((x), __pu_addr, (size), __pu_err); \
__pu_err; \
@@ -188,7 +188,7 @@ do { \
({ \
long __pu_err = -EFAULT; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- might_sleep(); \
+ might_fault(); \
if (access_ok(VERIFY_WRITE, __pu_addr, size)) \
__put_user_size((x), __pu_addr, (size), __pu_err); \
__pu_err; \
@@ -268,7 +268,7 @@ do { \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
__chk_user_ptr(ptr); \
if (!is_kernel_addr((unsigned long)__gu_addr)) \
- might_sleep(); \
+ might_fault(); \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
@@ -282,7 +282,7 @@ do { \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
__chk_user_ptr(ptr); \
if (!is_kernel_addr((unsigned long)__gu_addr)) \
- might_sleep(); \
+ might_fault(); \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
@@ -294,7 +294,7 @@ do { \
long __gu_err = -EFAULT; \
unsigned long __gu_val = 0; \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
- might_sleep(); \
+ might_fault(); \
if (access_ok(VERIFY_READ, __gu_addr, (size))) \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
@@ -419,14 +419,14 @@ static inline unsigned long __copy_to_user_inatomic(void __user *to,
static inline unsigned long __copy_from_user(void *to,
const void __user *from, unsigned long size)
{
- might_sleep();
+ might_fault();
return __copy_from_user_inatomic(to, from, size);
}
static inline unsigned long __copy_to_user(void __user *to,
const void *from, unsigned long size)
{
- might_sleep();
+ might_fault();
return __copy_to_user_inatomic(to, from, size);
}
@@ -434,7 +434,7 @@ extern unsigned long __clear_user(void __user *addr, unsigned long size);
static inline unsigned long clear_user(void __user *addr, unsigned long size)
{
- might_sleep();
+ might_fault();
if (likely(access_ok(VERIFY_WRITE, addr, size)))
return __clear_user(addr, size);
if ((unsigned long)addr < TASK_SIZE) {
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h
index 8a082bc6bca5..e4d44bd7df27 100644
--- a/arch/tile/include/asm/uaccess.h
+++ b/arch/tile/include/asm/uaccess.h
@@ -442,7 +442,7 @@ extern unsigned long __copy_in_user_inatomic(
static inline unsigned long __must_check
__copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
return __copy_in_user_inatomic(to, from, n);
}
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 142810c457dc..4f7923dd0007 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -235,7 +235,7 @@ extern long __copy_user_nocache(void *dst, const void __user *src,
static inline int
__copy_from_user_nocache(void *dst, const void __user *src, unsigned size)
{
- might_sleep();
+ might_fault();
return __copy_user_nocache(dst, src, size, 1);
}
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index c184aa8ec8cd..dc1269c74a52 100644
--- a/include/asm-generic/uaccess.h
+++ b/include/asm-generic/uaccess.h
@@ -163,7 +163,7 @@ static inline __must_check long __copy_to_user(void __user *to,
#define put_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)) ? \
__put_user(x, ptr) : \
-EFAULT; \
@@ -225,7 +225,7 @@ extern int __put_user_bad(void) __attribute__((noreturn));
#define get_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
access_ok(VERIFY_READ, ptr, sizeof(*ptr)) ? \
__get_user(x, ptr) : \
-EFAULT; \
@@ -255,7 +255,7 @@ extern int __get_user_bad(void) __attribute__((noreturn));
static inline long copy_from_user(void *to,
const void __user * from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_READ, from, n))
return __copy_from_user(to, from, n);
else
@@ -265,7 +265,7 @@ static inline long copy_from_user(void *to,
static inline long copy_to_user(void __user *to,
const void *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_WRITE, to, n))
return __copy_to_user(to, from, n);
else
@@ -336,7 +336,7 @@ __clear_user(void __user *to, unsigned long n)
static inline __must_check unsigned long
clear_user(void __user *to, unsigned long n)
{
- might_sleep();
+ might_fault();
if (!access_ok(VERIFY_WRITE, to, n))
return n;
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 3afb969441d1..7e6b97e77fb9 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -193,13 +193,10 @@ extern int _cond_resched(void);
(__x < 0) ? -__x : __x; \
})
-#ifdef CONFIG_PROVE_LOCKING
+#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP)
void might_fault(void);
#else
-static inline void might_fault(void)
-{
- might_sleep();
-}
+static inline void might_fault(void) { }
#endif
extern struct atomic_notifier_head panic_notifier_list;
diff --git a/mm/memory.c b/mm/memory.c
index 61a262b08e53..95d0cce63583 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4201,7 +4201,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
up_read(&mm->mmap_sem);
}
-#ifdef CONFIG_PROVE_LOCKING
+#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP)
void might_fault(void)
{
/*
@@ -4213,13 +4213,17 @@ void might_fault(void)
if (segment_eq(get_fs(), KERNEL_DS))
return;
- might_sleep();
/*
* it would be nicer only to annotate paths which are not under
* pagefault_disable, however that requires a larger audit and
* providing helpers like get_user_atomic.
*/
- if (!in_atomic() && current->mm)
+ if (in_atomic())
+ return;
+
+ __might_sleep(__FILE__, __LINE__, 0);
+
+ if (current->mm)
might_lock_read(&current->mm->mmap_sem);
}
EXPORT_SYMBOL(might_fault);
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