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[PATCH] __user annotations: futex

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro 2006-10-10 22:46:07 +01:00 committed by Linus Torvalds
parent 28c4dadd3a
commit ba46df984b
4 changed files with 16 additions and 15 deletions
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2
include/linux/compat.h
View file

@ -163,7 +163,7 @@ asmlinkage long
compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
compat_size_t len);
asmlinkage long
compat_sys_get_robust_list(int pid, compat_uptr_t *head_ptr,
compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
compat_size_t __user *len_ptr);
long compat_sys_semctl(int first, int second, int third, void __user *uptr);

2
include/linux/syscalls.h
View file

@ -593,7 +593,7 @@ asmlinkage long sys_tee(int fdin, int fdout, size_t len, unsigned int flags);
asmlinkage long sys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
unsigned int flags);
asmlinkage long sys_get_robust_list(int pid,
struct robust_list_head __user **head_ptr,
struct robust_list_head __user * __user *head_ptr,
size_t __user *len_ptr);
asmlinkage long sys_set_robust_list(struct robust_list_head __user *head,
size_t len);

15
kernel/futex.c
View file

@ -1612,10 +1612,10 @@ sys_set_robust_list(struct robust_list_head __user *head,
* @len_ptr: pointer to a length field, the kernel fills in the header size
*/
asmlinkage long
sys_get_robust_list(int pid, struct robust_list_head __user **head_ptr,
sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
size_t __user *len_ptr)
{
struct robust_list_head *head;
struct robust_list_head __user *head;
unsigned long ret;
if (!pid)
@ -1694,14 +1694,15 @@ int handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi)
* Fetch a robust-list pointer. Bit 0 signals PI futexes:
*/
static inline int fetch_robust_entry(struct robust_list __user **entry,
struct robust_list __user **head, int *pi)
struct robust_list __user * __user *head,
int *pi)
{
unsigned long uentry;
if (get_user(uentry, (unsigned long *)head))
if (get_user(uentry, (unsigned long __user *)head))
return -EFAULT;
*entry = (void *)(uentry & ~1UL);
*entry = (void __user *)(uentry & ~1UL);
*pi = uentry & 1;
return 0;
@ -1739,7 +1740,7 @@ void exit_robust_list(struct task_struct *curr)
return;
if (pending)
handle_futex_death((void *)pending + futex_offset, curr, pip);
handle_futex_death((void __user *)pending + futex_offset, curr, pip);
while (entry != &head->list) {
/*
@ -1747,7 +1748,7 @@ void exit_robust_list(struct task_struct *curr)
* don't process it twice:
*/
if (entry != pending)
if (handle_futex_death((void *)entry + futex_offset,
if (handle_futex_death((void __user *)entry + futex_offset,
curr, pi))
return;
/*

12
kernel/futex_compat.c
View file

@ -18,7 +18,7 @@
*/
static inline int
fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry,
compat_uptr_t *head, int *pi)
compat_uptr_t __user *head, int *pi)
{
if (get_user(*uentry, head))
return -EFAULT;
@ -62,7 +62,7 @@ void compat_exit_robust_list(struct task_struct *curr)
&head->list_op_pending, &pip))
return;
if (upending)
handle_futex_death((void *)pending + futex_offset, curr, pip);
handle_futex_death((void __user *)pending + futex_offset, curr, pip);
while (compat_ptr(uentry) != &head->list) {
/*
@ -70,7 +70,7 @@ void compat_exit_robust_list(struct task_struct *curr)
* dont process it twice:
*/
if (entry != pending)
if (handle_futex_death((void *)entry + futex_offset,
if (handle_futex_death((void __user *)entry + futex_offset,
curr, pi))
return;
@ -78,7 +78,7 @@ void compat_exit_robust_list(struct task_struct *curr)
* Fetch the next entry in the list:
*/
if (fetch_robust_entry(&uentry, &entry,
(compat_uptr_t *)&entry->next, &pi))
(compat_uptr_t __user *)&entry->next, &pi))
return;
/*
* Avoid excessively long or circular lists:
@ -103,10 +103,10 @@ compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
}
asmlinkage long
compat_sys_get_robust_list(int pid, compat_uptr_t *head_ptr,
compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
compat_size_t __user *len_ptr)
{
struct compat_robust_list_head *head;
struct compat_robust_list_head __user *head;
unsigned long ret;
if (!pid)