linux-kernel - Re: [tpmdd-devel] [PATCH v2] tpm: fix: sanitized code paths in tpm_chip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1426837435.15442.2.camel@linux.intel.com>
Date:	Fri, 20 Mar 2015 09:43:55 +0200
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Scot Doyle <lkml14@...tdoyle.com>
Cc:	Peter Huewe <peterhuewe@....de>,
	Marcel Selhorst <tpmdd@...horst.net>,
	jason.gunthorpe@...idianresearch.com, christophe.ricard@...il.com,
	linux-kernel@...r.kernel.org, tpmdd-devel@...ts.sourceforge.net
Subject: Re: [tpmdd-devel] [PATCH v2] tpm: fix: sanitized code paths in
 tpm_chip_register()

On Wed, 2015-03-18 at 16:05 +0000, Scot Doyle wrote:
> On Wed, 18 Mar 2015, Jarkko Sakkinen wrote:
> > I started to work with PPI interface so that it would be available
> > under character device sysfs directory and realized that chip
> > registeration was still too messy.
> > 
> > In TPM 1.x in some rare scenarios (errors that almost never occur)
> > wrong order in deinitialization steps was taken in teardown. I
> > reproduced these scenarios by manually inserting error codes in the
> > place of the corresponding function calls.
> > 
> > The key problem is that the teardown is messy with two separate code
> > paths (this was inherited when moving code from tpm-interface.c).
> > 
> > Moved TPM 1.x specific register/unregister functionality to own helper
> > functions and added single code path for teardown in tpm_chip_register().
> > Now the code paths have been fixed and it should be easier to review
> > later on this part of the code.
> > 
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> 
> CONFIG_TCG_TPM=y
> CONFIG_TCG_TIS=y
> # CONFIG_TCG_TIS_I2C_ATMEL is not set
> # CONFIG_TCG_TIS_I2C_INFINEON is not set
> # CONFIG_TCG_TIS_I2C_NUVOTON is not set
> # CONFIG_TCG_NSC is not set
> # CONFIG_TCG_ATMEL is not set
> # CONFIG_TCG_INFINEON is not set
> # CONFIG_TCG_CRB is not set
> 
> [0.236145] tpm_tis 00:08: 1.2 TPM (device-id 0xB, rev-id 16)
> [0.292769] tpm_tis 00:08: [Firmware Bug]: TPM interrupt not working, polling instead
> 
> and suspend/resume continue to function.
> 
> Tested-by: Scot Doyle <lkml14@...tdoyle.com>

Thanks!

/Jarkko


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/