X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=lib%2Fstrnlen_user.c;h=41670d4a5816530d7b948fe29f0fad20a44ec2ed;hb=4a9892d75cfb964da23dc56d0538175aa8e161a7;hp=6c0005d5dd5c43e7ed4097c24d5fc785a794110e;hpb=84629d4370b8e6b7871d97440babece3eb1108a5;p=mirror_ubuntu-focal-kernel.git

diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c
index 6c0005d5dd5c..41670d4a5816 100644
--- a/lib/strnlen_user.c
+++ b/lib/strnlen_user.c
@@ -26,13 +26,6 @@ static inline long do_strnlen_user(const char __user *src, unsigned long count,
 	unsigned long align, res = 0;
 	unsigned long c;
 
-	/*
-	 * Truncate 'max' to the user-specified limit, so that
-	 * we only have one limit we need to check in the loop
-	 */
-	if (max > count)
-		max = count;
-
 	/*
 	 * Do everything aligned. But that means that we
 	 * need to also expand the maximum..
@@ -109,6 +102,13 @@ long strnlen_user(const char __user *str, long count)
 		unsigned long max = max_addr - src_addr;
 		long retval;
 
+		/*
+		 * Truncate 'max' to the user-specified limit, so that
+		 * we only have one limit we need to check in the loop
+		 */
+		if (max > count)
+			max = count;
+
 		if (user_access_begin(str, max)) {
 			retval = do_strnlen_user(str, count, max);
 			user_access_end();