From: James Morris <jmorris@namei.org>
To: Milan Broz <gmazyland@gmail.com>
Cc: linux-integrity@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH] tpm: Fix null pointer dereference on chip register error path
Date: Thu, 13 Jun 2019 06:57:09 +1000 (AEST) [thread overview]
Message-ID: <alpine.LRH.2.21.1906130656590.1778@namei.org> (raw)
In-Reply-To: <20190612084210.13562-1-gmazyland@gmail.com>
On Wed, 12 Jun 2019, Milan Broz wrote:
> If clk_enable is not defined and chip initialization
> is canceled code hits null dereference.
>
> Easily reproducible with vTPM init fail:
> swtpm chardev --tpmstate dir=nonexistent_dir --tpm2 --vtpm-proxy
>
> BUG: kernel NULL pointer dereference, address: 00000000
> ...
> Call Trace:
> tpm_chip_start+0x9d/0xa0 [tpm]
> tpm_chip_register+0x10/0x1a0 [tpm]
> vtpm_proxy_work+0x11/0x30 [tpm_vtpm_proxy]
> process_one_work+0x214/0x5a0
> worker_thread+0x134/0x3e0
> ? process_one_work+0x5a0/0x5a0
> kthread+0xd4/0x100
> ? process_one_work+0x5a0/0x5a0
> ? kthread_park+0x90/0x90
> ret_from_fork+0x19/0x24
>
> Signed-off-by: Milan Broz <gmazyland@gmail.com>
> Cc: stable@vger.kernel.org
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
--
James Morris
<jmorris@namei.org>
next prev parent reply other threads:[~2019-06-12 20:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 8:42 [PATCH] tpm: Fix null pointer dereference on chip register error path Milan Broz
2019-06-12 20:57 ` James Morris [this message]
2019-06-14 21:56 ` Sasha Levin
2019-06-15 6:28 ` Milan Broz
2019-06-28 7:56 ` Milan Broz
2019-07-02 18:37 ` Jarkko Sakkinen
2019-07-03 23:01 ` Jarkko Sakkinen
2019-07-04 7:26 ` [PATCH v2] " Milan Broz
2019-07-08 14:34 ` Jarkko Sakkinen
2019-07-08 14:44 ` Jarkko Sakkinen
2019-07-05 17:52 ` [PATCH] " Jarkko Sakkinen
2019-07-05 21:23 ` Milan Broz
2019-07-08 14:33 ` Jarkko Sakkinen
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