From: Jens Axboe <[email protected]>
To: Xiaoguang Wang <[email protected]>,
[email protected]
Cc: [email protected]
Subject: Re: [PATCH v2] io_uring: handle -EFAULT properly in io_uring_setup()
Date: Tue, 5 May 2020 13:18:30 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 5/5/20 2:28 AM, Xiaoguang Wang wrote:
> If copy_to_user() in io_uring_setup() failed, we'll leak many kernel
> resources, which will be recycled until process terminates. This bug
> can be reproduced by using mprotect to set params to PROT_READ. To fix
> this issue, refactor io_uring_create() a bit to add a new 'struct
> io_uring_params __user *params' parameter and move the copy_to_user()
> in io_uring_setup() to io_uring_setup(), if copy_to_user() failed,
> we can free kernel resource properly.
Applied, thanks!
--
Jens Axboe
prev parent reply other threads:[~2020-05-05 19:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 8:28 [PATCH v2] io_uring: handle -EFAULT properly in io_uring_setup() Xiaoguang Wang
2020-05-05 19:18 ` Jens Axboe [this message]
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