[PATCH] __user annotations: futex

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/compat.h b/include/linux/compat.h
index ef5cd19..f4ebf96 100644 (file)
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -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);

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 3efcfc7..b0ace3f 100644 (file)
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -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);

diff --git a/kernel/futex.c b/kernel/futex.c
index 4aaf919..b364e00 100644 (file)
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -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 @@ retry:
  * 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;
                /*

diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index c5cca3f..50f24ee 100644 (file)
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -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)