Re: [PATCH 0/1] io_uring: validate the full range of provided buffers for access

[Jens Axboe <axboe@xxxxxxxxx>]

On 6/4/20 7:01 PM, Bijan Mottahedeh wrote:
> I hard coded (user_max_address() - PAGESIZE) as the start address 
> in liburing/test/read-write.c:test_buf_select() and provided two buffers
> of PAGESIZE each.  Without the patch, io_uring_prep_provide_buffers()
> succeeds but the subsequent __test_io() obviously fails with -EFAULT.
> With the patch, io_uring_prep_provide_buffers() fails with -EFAULT.
> I think this would be a good test case to add but I'm not sure what
> would be a generic way to implement it.

Thanks, looks good to me. Applied for 5.8.

-- 
Jens Axboe