From: Pavel Begunkov <asml.silence@gmail.com> stable inclusion from stable-5.10.67 commit 54eb6211b979f21c4908719e8bfb005a1143e8c3 bugzilla: 182619 https://gitee.com/openeuler/kernel/issues/I4EWO7 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 26578cda3db983b17cabe4e577af26306beb9987 upstream. ->splice_fd_in is used only by splice/tee, but no other request checks it for validity. Add the check for most of request types excluding reads/writes/sends/recvs, we don't want overhead for them and can leave them be as is until the field is actually used. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/f44bc2acd6777d932de3d71a5692235b5b2b7397.162945168... Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Chen Jun <chenjun102@huawei.com> Acked-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> --- fs/io_uring.c | 40 ++++++++++++++++++++++++---------------- 1 file changed, 24 insertions(+), 16 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index a576c118963f..24162623337c 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3749,7 +3749,8 @@ static int io_prep_fsync(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (unlikely(ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; - if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index)) + if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index || + sqe->splice_fd_in)) return -EINVAL; req->sync.flags = READ_ONCE(sqe->fsync_flags); @@ -3782,7 +3783,8 @@ static int io_fsync(struct io_kiocb *req, bool force_nonblock) static int io_fallocate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { - if (sqe->ioprio || sqe->buf_index || sqe->rw_flags) + if (sqe->ioprio || sqe->buf_index || sqe->rw_flags || + sqe->splice_fd_in) return -EINVAL; if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; @@ -3813,7 +3815,7 @@ static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe const char __user *fname; int ret; - if (unlikely(sqe->ioprio || sqe->buf_index)) + if (unlikely(sqe->ioprio || sqe->buf_index || sqe->splice_fd_in)) return -EINVAL; if (unlikely(req->flags & REQ_F_FIXED_FILE)) return -EBADF; @@ -3929,7 +3931,8 @@ static int io_remove_buffers_prep(struct io_kiocb *req, struct io_provide_buf *p = &req->pbuf; u64 tmp; - if (sqe->ioprio || sqe->rw_flags || sqe->addr || sqe->len || sqe->off) + if (sqe->ioprio || sqe->rw_flags || sqe->addr || sqe->len || sqe->off || + sqe->splice_fd_in) return -EINVAL; tmp = READ_ONCE(sqe->fd); @@ -4005,7 +4008,7 @@ static int io_provide_buffers_prep(struct io_kiocb *req, struct io_provide_buf *p = &req->pbuf; u64 tmp; - if (sqe->ioprio || sqe->rw_flags) + if (sqe->ioprio || sqe->rw_flags || sqe->splice_fd_in) return -EINVAL; tmp = READ_ONCE(sqe->fd); @@ -4098,7 +4101,7 @@ static int io_epoll_ctl_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { #if defined(CONFIG_EPOLL) - if (sqe->ioprio || sqe->buf_index) + if (sqe->ioprio || sqe->buf_index || sqe->splice_fd_in) return -EINVAL; if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL | IORING_SETUP_SQPOLL))) return -EINVAL; @@ -4144,7 +4147,7 @@ static int io_epoll_ctl(struct io_kiocb *req, bool force_nonblock, static int io_madvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { #if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU) - if (sqe->ioprio || sqe->buf_index || sqe->off) + if (sqe->ioprio || sqe->buf_index || sqe->off || sqe->splice_fd_in) return -EINVAL; if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; @@ -4179,7 +4182,7 @@ static int io_madvise(struct io_kiocb *req, bool force_nonblock) static int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { - if (sqe->ioprio || sqe->buf_index || sqe->addr) + if (sqe->ioprio || sqe->buf_index || sqe->addr || sqe->splice_fd_in) return -EINVAL; if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; @@ -4217,7 +4220,7 @@ static int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL | IORING_SETUP_SQPOLL))) return -EINVAL; - if (sqe->ioprio || sqe->buf_index) + if (sqe->ioprio || sqe->buf_index || sqe->splice_fd_in) return -EINVAL; if (req->flags & REQ_F_FIXED_FILE) return -EBADF; @@ -4264,7 +4267,7 @@ static int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL))) return -EINVAL; if (sqe->ioprio || sqe->off || sqe->addr || sqe->len || - sqe->rw_flags || sqe->buf_index) + sqe->rw_flags || sqe->buf_index || sqe->splice_fd_in) return -EINVAL; if (req->flags & REQ_F_FIXED_FILE) return -EBADF; @@ -4320,7 +4323,8 @@ static int io_prep_sfr(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (unlikely(ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; - if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index)) + if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index || + sqe->splice_fd_in)) return -EINVAL; req->sync.off = READ_ONCE(sqe->off); @@ -4763,7 +4767,7 @@ static int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL))) return -EINVAL; - if (sqe->ioprio || sqe->len || sqe->buf_index) + if (sqe->ioprio || sqe->len || sqe->buf_index || sqe->splice_fd_in) return -EINVAL; accept->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); @@ -4804,7 +4808,8 @@ static int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL))) return -EINVAL; - if (sqe->ioprio || sqe->len || sqe->buf_index || sqe->rw_flags) + if (sqe->ioprio || sqe->len || sqe->buf_index || sqe->rw_flags || + sqe->splice_fd_in) return -EINVAL; conn->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); @@ -5556,7 +5561,8 @@ static int io_timeout_remove_prep(struct io_kiocb *req, return -EINVAL; if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT))) return -EINVAL; - if (sqe->ioprio || sqe->buf_index || sqe->len || sqe->timeout_flags) + if (sqe->ioprio || sqe->buf_index || sqe->len || sqe->timeout_flags | + sqe->splice_fd_in) return -EINVAL; req->timeout_rem.addr = READ_ONCE(sqe->addr); @@ -5593,7 +5599,8 @@ static int io_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe, if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; - if (sqe->ioprio || sqe->buf_index || sqe->len != 1) + if (sqe->ioprio || sqe->buf_index || sqe->len != 1 || + sqe->splice_fd_in) return -EINVAL; if (off && is_timeout_link) return -EINVAL; @@ -5737,7 +5744,8 @@ static int io_async_cancel_prep(struct io_kiocb *req, return -EINVAL; if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT))) return -EINVAL; - if (sqe->ioprio || sqe->off || sqe->len || sqe->cancel_flags) + if (sqe->ioprio || sqe->off || sqe->len || sqe->cancel_flags || + sqe->splice_fd_in) return -EINVAL; req->cancel.addr = READ_ONCE(sqe->addr); -- 2.20.1