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[ Upstream commit ec16b147a55bfa14e858234eb7b1a7c8e7cd5021 ] Reject values that are valid rw_hints after truncation but not before truncation by passing an untruncated value to rw_hint_valid(). Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kanchan Joshi <joshi.k@samsung.com> Cc: Jeff Layton <jlayton@kernel.org> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Fixes: 5657cb0 ("fs/fcntl: use copy_to/from_user() for u64 types") Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20240202203926.2478590-2-bvanassche@acm.org Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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