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-rw-r--r--include/asm-generic/uaccess.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index 6d8cab22e29..5dd511b62ce 100644
--- a/include/asm-generic/uaccess.h
+++ b/include/asm-generic/uaccess.h
@@ -291,6 +291,8 @@ strncpy_from_user(char *dst, const char __user *src, long count)
#ifndef strnlen_user
static inline long strnlen_user(const char __user *src, long n)
{
+ if (!access_ok(VERIFY_READ, src, 1))
+ return 0;
return strlen((void * __force)src) + 1;
}
#endif