Commit 59724793 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Sasha Levin

fs: completely ignore unknown open flags

[ Upstream commit 629e014b ]

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 avatarSasha Levin <alexander.levin@verizon.com>
parent 666d1fc2
......@@ -881,6 +881,12 @@ 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
......
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