1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 7acc632c3b82..4b14a3208fbe 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -1190,7 +1190,7 @@ static ssize_t psi_write(struct file *file, const char __user *user_buf,
         if (static_branch_likely(&psi_disabled))
                 return -EOPNOTSUPP;
 
-        buf_size = min(nbytes, (sizeof(buf) - 1));
+        buf_size = min(nbytes, sizeof(buf));
         if (copy_from_user(buf, user_buf, buf_size))
                 return -EFAULT;