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-rw-r--r--fs/crypto/fname.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index 305541bcd108..b8c5061553b1 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -15,6 +15,17 @@
#include <linux/ratelimit.h>
#include "fscrypt_private.h"
+static inline bool fscrypt_is_dot_dotdot(const struct qstr *str)
+{
+ if (str->len == 1 && str->name[0] == '.')
+ return true;
+
+ if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
+ return true;
+
+ return false;
+}
+
/**
* fname_encrypt() - encrypt a filename
*