From 97aa9479366568918e1f0b3fff6a252fcc04b0a2 Mon Sep 17 00:00:00 2001
From: adilger <adilger>
Date: Wed, 6 Jul 2005 08:38:53 +0000
Subject: [PATCH] Branch b1_4 Validate user input to lru_size procfile.

---
 lustre/ldlm/ldlm_resource.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lustre/ldlm/ldlm_resource.c b/lustre/ldlm/ldlm_resource.c
index 9a5922b..0b5f770 100644
--- a/lustre/ldlm/ldlm_resource.c
+++ b/lustre/ldlm/ldlm_resource.c
@@ -140,7 +140,8 @@ static int lprocfs_write_lru_size(struct file *file, const char *buffer,
         unsigned long tmp;
 
         dummy[MAX_STRING_SIZE] = '\0';
-        copy_from_user(dummy, buffer, MAX_STRING_SIZE);
+        if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
+                return -EFAULT;
 
         if (count == 6 && memcmp(dummy, "clear", 5) == 0) {
                 CDEBUG(D_DLMTRACE,
-- 
1.8.3.1