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From: Greg KH <>
To: Will McVicker <>
Cc: Jiri Kosina <>,
	Benjamin Tissoires <>,,,,,
	Will Coster <>
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/> (raw)
In-Reply-To: <>

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 <>

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 :)


greg k-h

  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 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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