linux-kernel - Re: [PATCH] tpm: handle negative priv->response_len in tpm_common

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Message-ID: <b469b7e8454a69402529cc8e25244860e136308e.camel@linux.intel.com>
Date:   Wed, 08 Jan 2020 17:58:41 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Tadeusz Struk <tadeusz.struk@...el.com>
Cc:     keescook@...omium.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, linux-integrity@...r.kernel.org,
        labbott@...hat.com
Subject: Re: [PATCH] tpm: handle negative priv->response_len in
 tpm_common_read

On Tue, 2020-01-07 at 14:04 -0800, Tadeusz Struk wrote:
> The priv->responce_length can hold the size of an response or
> an negative error code, and the tpm_common_read() needs to handle
> both cases correctly. Changed the type of responce_length to
> signed and accounted for negative value in tpm_common_read()
> 
> Cc: stable@...r.kernel.org
> Fixes: d23d12484307 ("tpm: fix invalid locking in NONBLOCKING mode")
> Reported-by: Laura Abbott <labbott@...hat.com>
> Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>

Adding to the next PR.

/Jarkko