Merge tag 'v3.10.55' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / ptrace.c

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index aed981a3f69c180dda76bfca76411656842eec01..afadcf7b4a22ddcdfd5b26993f892d8dd0eae653 100644 (file)
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -257,7 +257,8 @@ ok:
        if (task->mm)
                dumpable = get_dumpable(task->mm);
        rcu_read_lock();
-       if (!dumpable && !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
+       if (dumpable != SUID_DUMP_USER &&
+           !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
                rcu_read_unlock();
                return -EPERM;
        }
@@ -665,20 +666,22 @@ static int ptrace_peek_siginfo(struct task_struct *child,
                if (unlikely(is_compat_task())) {
                        compat_siginfo_t __user *uinfo = compat_ptr(data);
 
-                       ret = copy_siginfo_to_user32(uinfo, &info);
-                       ret |= __put_user(info.si_code, &uinfo->si_code);
+                       if (copy_siginfo_to_user32(uinfo, &info) ||
+                           __put_user(info.si_code, &uinfo->si_code)) {
+                               ret = -EFAULT;
+                               break;
+                       }
+
                } else
 #endif
                {
                        siginfo_t __user *uinfo = (siginfo_t __user *) data;
 
-                       ret = copy_siginfo_to_user(uinfo, &info);
-                       ret |= __put_user(info.si_code, &uinfo->si_code);
-               }
-
-               if (ret) {
-                       ret = -EFAULT;
-                       break;
+                       if (copy_siginfo_to_user(uinfo, &info) ||
+                           __put_user(info.si_code, &uinfo->si_code)) {
+                               ret = -EFAULT;
+                               break;
+                       }
                }
 
                data += sizeof(siginfo_t);