Make code analysis simpler and future changes easier by
always taking siglock in ptrace_resume.
Signed-off-by: "Eric W. Biederman" <ebied...@xmission.com>
---
kernel/ptrace.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 83ed28262708..36a5b7a00d2f 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -837,8 +837,6 @@ static long ptrace_get_rseq_configuration(struct
task_struct *task,
static int ptrace_resume(struct task_struct *child, long request,
unsigned long data)
{
- bool need_siglock;
-
if (!valid_signal(data))
return -EIO;
@@ -874,18 +872,11 @@ static int ptrace_resume(struct task_struct *child, long
request,
* Note that we need siglock even if ->exit_code == data and/or this
* status was not reported yet, the new status must not be cleared by
* wait_task_stopped() after resume.
- *
- * If data == 0 we do not care if wait_task_stopped() reports the old
- * status and clears the code too; this can't race with the tracee, it
- * takes siglock after resume.
*/
- need_siglock = data && !thread_group_empty(current);
- if (need_siglock)
- spin_lock_irq(&child->sighand->siglock);
+ spin_lock_irq(&child->sighand->siglock);
child->exit_code = data;
wake_up_state(child, __TASK_TRACED);
- if (need_siglock)
- spin_unlock_irq(&child->sighand->siglock);
+ spin_unlock_irq(&child->sighand->siglock);
return 0;
}
--
2.35.3
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