drm/amdgpu: Prevent random memory access in FRU code

[linux-2.6-microblaze.git] / mm / madvise.c

diff --git a/mm/madvise.c b/mm/madvise.c
index 0734db8..8c92720 100644 (file)
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1235,7 +1235,6 @@ SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec,
        struct iovec iovstack[UIO_FASTIOV], iovec;
        struct iovec *iov = iovstack;
        struct iov_iter iter;
-       struct pid *pid;
        struct task_struct *task;
        struct mm_struct *mm;
        size_t total_len;
@@ -1250,18 +1249,12 @@ SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec,
        if (ret < 0)
                goto out;
 
-       pid = pidfd_get_pid(pidfd, &f_flags);
-       if (IS_ERR(pid)) {
-               ret = PTR_ERR(pid);
+       task = pidfd_get_task(pidfd, &f_flags);
+       if (IS_ERR(task)) {
+               ret = PTR_ERR(task);
                goto free_iov;
        }
 
-       task = get_pid_task(pid, PIDTYPE_PID);
-       if (!task) {
-               ret = -ESRCH;
-               goto put_pid;
-       }
-
        if (!process_madvise_behavior_valid(behavior)) {
                ret = -EINVAL;
                goto release_task;
@@ -1301,8 +1294,6 @@ release_mm:
        mmput(mm);
 release_task:
        put_task_struct(task);
-put_pid:
-       put_pid(pid);
 free_iov:
        kfree(iov);
 out: