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Commit 4043d5bc authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Greg Kroah-Hartman
Browse files

fs: completely ignore unknown open flags 



commit 629e014bb8349fcf7c1e4df19a842652ece1c945 upstream.

Currently we just stash anything we got into file->f_flags, and the
report it in fcntl(F_GETFD).  This patch just clears out all unknown
flags so that we don't pass them to the fs or report them.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ccb973e6

fs/open.c

+6 −0
Original line number Diff line number Diff line
@@ -885,6 +885,12 @@ 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