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Diffstat (limited to 'kernel/ptrace.c')
-rw-r--r--kernel/ptrace.c36
1 files changed, 21 insertions, 15 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index f34d798ef4a2..99bbaa3e5b0d 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -181,7 +181,7 @@ int ptrace_attach(struct task_struct *task)
* under ptrace.
*/
retval = -ERESTARTNOINTR;
- if (mutex_lock_interruptible(&task->cred_guard_mutex))
+ if (mutex_lock_interruptible(&task->signal->cred_guard_mutex))
goto out;
task_lock(task);
@@ -208,7 +208,7 @@ int ptrace_attach(struct task_struct *task)
unlock_tasklist:
write_unlock_irq(&tasklist_lock);
unlock_creds:
- mutex_unlock(&task->cred_guard_mutex);
+ mutex_unlock(&task->signal->cred_guard_mutex);
out:
return retval;
}
@@ -329,6 +329,8 @@ int ptrace_detach(struct task_struct *child, unsigned int data)
* and reacquire the lock.
*/
void exit_ptrace(struct task_struct *tracer)
+ __releases(&tasklist_lock)
+ __acquires(&tasklist_lock)
{
struct task_struct *p, *n;
LIST_HEAD(ptrace_dead);
@@ -402,7 +404,7 @@ int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long ds
return copied;
}
-static int ptrace_setoptions(struct task_struct *child, long data)
+static int ptrace_setoptions(struct task_struct *child, unsigned long data)
{
child->ptrace &= ~PT_TRACE_MASK;
@@ -481,7 +483,8 @@ static int ptrace_setsiginfo(struct task_struct *child, const siginfo_t *info)
#define is_sysemu_singlestep(request) 0
#endif
-static int ptrace_resume(struct task_struct *child, long request, long data)
+static int ptrace_resume(struct task_struct *child, long request,
+ unsigned long data)
{
if (!valid_signal(data))
return -EIO;
@@ -558,10 +561,12 @@ static int ptrace_regset(struct task_struct *task, int req, unsigned int type,
#endif
int ptrace_request(struct task_struct *child, long request,
- long addr, long data)
+ unsigned long addr, unsigned long data)
{
int ret = -EIO;
siginfo_t siginfo;
+ void __user *datavp = (void __user *) data;
+ unsigned long __user *datalp = datavp;
switch (request) {
case PTRACE_PEEKTEXT:
@@ -578,19 +583,17 @@ int ptrace_request(struct task_struct *child, long request,
ret = ptrace_setoptions(child, data);
break;
case PTRACE_GETEVENTMSG:
- ret = put_user(child->ptrace_message, (unsigned long __user *) data);
+ ret = put_user(child->ptrace_message, datalp);
break;
case PTRACE_GETSIGINFO:
ret = ptrace_getsiginfo(child, &siginfo);
if (!ret)
- ret = copy_siginfo_to_user((siginfo_t __user *) data,
- &siginfo);
+ ret = copy_siginfo_to_user(datavp, &siginfo);
break;
case PTRACE_SETSIGINFO:
- if (copy_from_user(&siginfo, (siginfo_t __user *) data,
- sizeof siginfo))
+ if (copy_from_user(&siginfo, datavp, sizeof siginfo))
ret = -EFAULT;
else
ret = ptrace_setsiginfo(child, &siginfo);
@@ -621,7 +624,7 @@ int ptrace_request(struct task_struct *child, long request,
}
mmput(mm);
- ret = put_user(tmp, (unsigned long __user *) data);
+ ret = put_user(tmp, datalp);
break;
}
#endif
@@ -650,7 +653,7 @@ int ptrace_request(struct task_struct *child, long request,
case PTRACE_SETREGSET:
{
struct iovec kiov;
- struct iovec __user *uiov = (struct iovec __user *) data;
+ struct iovec __user *uiov = datavp;
if (!access_ok(VERIFY_WRITE, uiov, sizeof(*uiov)))
return -EFAULT;
@@ -691,7 +694,8 @@ static struct task_struct *ptrace_get_task_struct(pid_t pid)
#define arch_ptrace_attach(child) do { } while (0)
#endif
-SYSCALL_DEFINE4(ptrace, long, request, long, pid, long, addr, long, data)
+SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr,
+ unsigned long, data)
{
struct task_struct *child;
long ret;
@@ -732,7 +736,8 @@ SYSCALL_DEFINE4(ptrace, long, request, long, pid, long, addr, long, data)
return ret;
}
-int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data)
+int generic_ptrace_peekdata(struct task_struct *tsk, unsigned long addr,
+ unsigned long data)
{
unsigned long tmp;
int copied;
@@ -743,7 +748,8 @@ int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data)
return put_user(tmp, (unsigned long __user *)data);
}
-int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data)
+int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr,
+ unsigned long data)
{
int copied;