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io_uring/fs: consider link->flags when getting path for LINKAT
commit8479063f1f
upstream. In order for `AT_EMPTY_PATH` to work as expected, the fact that the user wants that behavior needs to make it to `getname_flags` or it will return ENOENT. Fixes:cf30da90bc
("io_uring: add support for IORING_OP_LINKAT") Cc: <stable@vger.kernel.org> Link: https://github.com/axboe/liburing/issues/995 Signed-off-by: Charles Mirabile <cmirabil@redhat.com> Link: https://lore.kernel.org/r/20231120105545.1209530-1-cmirabil@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -4049,7 +4049,7 @@ static int io_linkat_prep(struct io_kiocb *req,
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newf = u64_to_user_ptr(READ_ONCE(sqe->addr2));
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lnk->flags = READ_ONCE(sqe->hardlink_flags);
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lnk->oldpath = getname(oldf);
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lnk->oldpath = getname_uflags(oldf, lnk->flags);
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if (IS_ERR(lnk->oldpath))
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return PTR_ERR(lnk->oldpath);
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