new helper: memdup_user_nul()

Similar to memdup_user(), except that allocated buffer is one byte longer and '\0' is stored after the copied data. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-12-24 00:06:05 -05:00
parent 74bf8efb5f
commit e9d408e107
2 changed files with 32 additions and 0 deletions
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -10,6 +10,7 @@

 extern char *strndup_user(const char __user *, long);
 extern void *memdup_user(const void __user *, size_t);
+extern void *memdup_user_nul(const void __user *, size_t);

 /*
 * Include machine specific inline routines