From: Greg KH <gregkh@linuxfoundation.org>
To: Will McVicker <willmcvicker@google.com>
Cc: Jiri Kosina <jikos@kernel.org>,
Benjamin Tissoires <benjamin.tissoires@redhat.com>,
security@kernel.org, linux-input@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel-team@android.com,
Will Coster <willcoster@google.com>
Subject: Re: [PATCH v1] HID: make arrays usage and value to be the same
Date: Sat, 5 Dec 2020 09:59:57 +0100 [thread overview]
Message-ID: <X8tMDQTls/RcTSAy@kroah.com> (raw)
In-Reply-To: <20201205004848.2541215-1-willmcvicker@google.com>
On Sat, Dec 05, 2020 at 12:48:48AM +0000, Will McVicker wrote:
> The HID subsystem allows an "HID report field" to have a different
> number of "values" and "usages" when it is allocated. When a field
> struct is created, the size of the usage array is guaranteed to be at
> least as large as the values array, but it may be larger. This leads to
> a potential out-of-bounds write in
> __hidinput_change_resolution_multipliers() and an out-of-bounds read in
> hidinput_count_leds().
>
> To fix this, let's make sure that both the usage and value arrays are
> the same size.
>
> Signed-off-by: Will McVicker <willmcvicker@google.com>
Any reason not to also add a cc: stable on this?
And, has this always been the case, or was this caused by some specific
commit in the past? If so, a "Fixes:" tag is always nice to included.
And finally, as you have a fix for this already, no need to cc:
security@k.o as there's nothing the people there can do about it now :)
thanks,
greg k-h
next prev parent reply other threads:[~2020-12-05 9:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-05 0:48 [PATCH v1] HID: make arrays usage and value to be the same Will McVicker
2020-12-05 8:59 ` Greg KH [this message]
2020-12-07 17:55 ` Will McVicker
2020-12-07 18:24 ` Greg KH
2020-12-07 19:05 ` Will McVicker
2020-12-14 19:15 ` Will McVicker
2020-12-17 10:19 ` Jiri Kosina
2020-12-17 18:42 ` Will McVicker
2021-01-14 18:19 ` Will McVicker
2021-01-18 8:11 ` Jiri Kosina
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