fs: completely ignore unknown open flags

[karo-tx-linux.git] / fs / open.c

diff --git a/fs/open.c b/fs/open.c
index 949cef29c3bba9395efd2e461d2078d0a9a9b47c..7bba2b952f1e4a816699942a46d70bb69fb6c823 100644 (file)
--- a/fs/open.c
+++ b/fs/open.c
@@ -900,6 +900,12 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
        int lookup_flags = 0;
        int acc_mode = ACC_MODE(flags);
 
+       /*
+        * Clear out all open flags we don't know about so that we don't report
+        * them in fcntl(F_GETFD) or similar interfaces.
+        */
+       flags &= VALID_OPEN_FLAGS;
+
        if (flags & (O_CREAT | __O_TMPFILE))
                op->mode = (mode & S_IALLUGO) | S_IFREG;
        else