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-rw-r--r--fs/open.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/open.c b/fs/open.c
index e70cca15c976..1fd96c5d3895 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -898,6 +898,12 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
int lookup_flags = 0;
int acc_mode;
+ /*
+ * 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