Re: [PATCH] dm ioctl: prevent stack leak in dm ioctl call

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Subject: Re: [PATCH] dm ioctl: prevent stack leak in dm ioctl call
From: Adrian Salido <salidoa@xxxxxxxxxx>
Date: Thu, 27 Apr 2017 10:37:31 -0700
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In-reply-to: <20170427154348.GD5330@agk-dp.fab.redhat.com>
References: <20170425233129.GA155598@google.com> <20170426001117.GA7433@agk-dp.fab.redhat.com> <CAEP91RFJTRk7Ux3W=1TMfgjzF1cMc5jXF+om4Qchh8RDx84MtQ@mail.gmail.com> <20170427154348.GD5330@agk-dp.fab.redhat.com>

> So at the moment, we're leaning towards just:
>
>   param->data_size = offsetof(struct dm_ioctl, data)

This works, it allows functions processing the ioctl to override if
needed and is cleaner

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References:
- [PATCH] dm ioctl: prevent stack leak in dm ioctl call
  - From: Adrian Salido
- Re: [PATCH] dm ioctl: prevent stack leak in dm ioctl call
  - From: Alasdair G Kergon
- Re: [PATCH] dm ioctl: prevent stack leak in dm ioctl call
  - From: Adrian Salido
- Re: [PATCH] dm ioctl: prevent stack leak in dm ioctl call
  - From: Alasdair G Kergon

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