From: Pavel Begunkov asml.silence@gmail.com
[ Upstream commit 632546c4b5a4dad8e3ac456406c65c0db9a0b570 ]
io_size and iov_count in io_read() and io_write() hold the same value, kill the last one.
Signed-off-by: Pavel Begunkov asml.silence@gmail.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/io_uring.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 8de0f52fd29d..d0089039fee7 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3413,7 +3413,6 @@ static int io_read(struct io_kiocb *req, bool force_nonblock, struct iov_iter __iter, *iter = &__iter; struct io_async_rw *rw = req->async_data; ssize_t io_size, ret, ret2; - size_t iov_count; bool no_async;
if (rw) @@ -3422,8 +3421,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock, ret = io_import_iovec(READ, req, &iovec, iter, !force_nonblock); if (ret < 0) return ret; - iov_count = iov_iter_count(iter); - io_size = iov_count; + io_size = iov_iter_count(iter); req->result = io_size; ret = 0;
@@ -3439,7 +3437,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock, if (no_async) goto copy_iov;
- ret = rw_verify_area(READ, req->file, io_kiocb_ppos(kiocb), iov_count); + ret = rw_verify_area(READ, req->file, io_kiocb_ppos(kiocb), io_size); if (unlikely(ret)) goto out_free;
@@ -3458,7 +3456,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock, if (req->file->f_flags & O_NONBLOCK) goto done; /* some cases will consume bytes even on error returns */ - iov_iter_revert(iter, iov_count - iov_iter_count(iter)); + iov_iter_revert(iter, io_size - iov_iter_count(iter)); ret = 0; goto copy_iov; } else if (ret < 0) { @@ -3542,7 +3540,6 @@ static int io_write(struct io_kiocb *req, bool force_nonblock, struct kiocb *kiocb = &req->rw.kiocb; struct iov_iter __iter, *iter = &__iter; struct io_async_rw *rw = req->async_data; - size_t iov_count; ssize_t ret, ret2, io_size;
if (rw) @@ -3551,8 +3548,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock, ret = io_import_iovec(WRITE, req, &iovec, iter, !force_nonblock); if (ret < 0) return ret; - iov_count = iov_iter_count(iter); - io_size = iov_count; + io_size = iov_iter_count(iter); req->result = io_size;
/* Ensure we clear previously set non-block flag */ @@ -3570,7 +3566,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock, (req->flags & REQ_F_ISREG)) goto copy_iov;
- ret = rw_verify_area(WRITE, req->file, io_kiocb_ppos(kiocb), iov_count); + ret = rw_verify_area(WRITE, req->file, io_kiocb_ppos(kiocb), io_size); if (unlikely(ret)) goto out_free;
@@ -3613,7 +3609,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock, } else { copy_iov: /* some cases will consume bytes even on error returns */ - iov_iter_revert(iter, iov_count - iov_iter_count(iter)); + iov_iter_revert(iter, io_size - iov_iter_count(iter)); ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false); if (!ret) return -EAGAIN;