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Date:   Sun, 5 Nov 2017 08:31:21 +0100
From:   Greg KH <>
To:     Aleksa Sarai <>
Cc:     "James E.J. Bottomley" <>,
        "Martin K. Petersen" <>,,,,
        Valentin Rothberg <>,,, "Eric W. Biederman" <>
Subject: Re: [PATCH v3] scsi: require CAP_SYS_ADMIN to write to procfs

On Sun, Nov 05, 2017 at 01:56:35PM +1100, Aleksa Sarai wrote:
> Previously, the only capability effectively required to operate on the
> /proc/scsi interface was CAP_DAC_OVERRIDE (or for some other files,
> having an fsuid of GLOBAL_ROOT_UID was enough). This means that
> semi-privileged processes could interfere with core components of a
> system (such as causing a DoS by removing the underlying SCSI device of
> the host's / mount).

Given that the previous patch didn't even compile, I worry that you have
not tested this at all to see what breaks/changes in userspace with this
type of user-visable api change.

What did you do to test this?


greg k-h

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