SQEs are user writable, don't read sqe->off twice in io_timeout_prep()
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
{
struct io_timeout_data *data;
unsigned flags;
+ u32 off = READ_ONCE(sqe->off);
if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
return -EINVAL;
if (sqe->ioprio || sqe->buf_index || sqe->len != 1)
return -EINVAL;
- if (sqe->off && is_timeout_link)
+ if (off && is_timeout_link)
return -EINVAL;
flags = READ_ONCE(sqe->timeout_flags);
if (flags & ~IORING_TIMEOUT_ABS)
return -EINVAL;
- req->timeout.count = READ_ONCE(sqe->off);
+ req->timeout.count = off;
if (!req->io && io_alloc_async_ctx(req))
return -ENOMEM;