From: Tomas Winkler <tomas.winkler@intel.com> To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>, Jason Gunthorpe <jgg@ziepe.ca> Cc: Alexander Usyskin <alexander.usyskin@intel.com>, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Tomas Winkler <tomas.winkler@intel.com> Subject: [PATCH] tpm: tpm_crb: relinquish locality on error path. Date: Sat, 7 Apr 2018 19:12:36 +0300 [thread overview] Message-ID: <20180407161236.22969-1-tomas.winkler@intel.com> (raw) In crb_map_io() function, __crb_request_locality() is called prior to crb_cmd_ready(), but if one of the consecutive function fails the flow bails out instead of trying to relinquish locality. This patch adds goto jump to __crb_relinquish_locality() on the error path. Fixes: 888d867df441 (tpm: cmd_ready command can be issued only after granting locality) Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> --- drivers/char/tpm/tpm_crb.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index 7f78482cd157..34fbc6cb097b 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -511,8 +511,10 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, sizeof(struct crb_regs_tail)); - if (IS_ERR(priv->regs_t)) - return PTR_ERR(priv->regs_t); + if (IS_ERR(priv->regs_t)) { + ret = PTR_ERR(priv->regs_t); + goto out_relinquish_locality; + } /* * PTT HW bug w/a: wake up the device to access @@ -520,7 +522,7 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, */ ret = crb_cmd_ready(dev, priv); if (ret) - return ret; + goto out_relinquish_locality; pa_high = ioread32(&priv->regs_t->ctrl_cmd_pa_high); pa_low = ioread32(&priv->regs_t->ctrl_cmd_pa_low); @@ -565,6 +567,8 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, crb_go_idle(dev, priv); +out_relinquish_locality: + __crb_relinquish_locality(dev, priv, 0); return ret; -- 2.14.3
WARNING: multiple messages have this Message-ID (diff)
From: tomas.winkler@intel.com (Tomas Winkler) To: linux-security-module@vger.kernel.org Subject: [PATCH] tpm: tpm_crb: relinquish locality on error path. Date: Sat, 7 Apr 2018 19:12:36 +0300 [thread overview] Message-ID: <20180407161236.22969-1-tomas.winkler@intel.com> (raw) In crb_map_io() function, __crb_request_locality() is called prior to crb_cmd_ready(), but if one of the consecutive function fails the flow bails out instead of trying to relinquish locality. This patch adds goto jump to __crb_relinquish_locality() on the error path. Fixes: 888d867df441 (tpm: cmd_ready command can be issued only after granting locality) Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> --- drivers/char/tpm/tpm_crb.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index 7f78482cd157..34fbc6cb097b 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -511,8 +511,10 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, sizeof(struct crb_regs_tail)); - if (IS_ERR(priv->regs_t)) - return PTR_ERR(priv->regs_t); + if (IS_ERR(priv->regs_t)) { + ret = PTR_ERR(priv->regs_t); + goto out_relinquish_locality; + } /* * PTT HW bug w/a: wake up the device to access @@ -520,7 +522,7 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, */ ret = crb_cmd_ready(dev, priv); if (ret) - return ret; + goto out_relinquish_locality; pa_high = ioread32(&priv->regs_t->ctrl_cmd_pa_high); pa_low = ioread32(&priv->regs_t->ctrl_cmd_pa_low); @@ -565,6 +567,8 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, crb_go_idle(dev, priv); +out_relinquish_locality: + __crb_relinquish_locality(dev, priv, 0); return ret; -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next reply other threads:[~2018-04-07 16:16 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-04-07 16:12 Tomas Winkler [this message] 2018-04-07 16:12 ` [PATCH] tpm: tpm_crb: relinquish locality on error path Tomas Winkler 2018-04-09 11:13 ` Jarkko Sakkinen 2018-04-09 11:13 ` Jarkko Sakkinen 2018-04-10 9:00 ` Winkler, Tomas 2018-04-10 9:00 ` Winkler, Tomas 2018-04-10 12:33 ` Jarkko Sakkinen 2018-04-10 12:33 ` Jarkko Sakkinen 2018-04-10 20:25 ` Winkler, Tomas 2018-04-10 20:25 ` Winkler, Tomas 2018-04-20 13:19 ` Winkler, Tomas 2018-04-20 13:19 ` Winkler, Tomas 2018-04-24 16:03 ` Jarkko Sakkinen 2018-04-24 16:03 ` Jarkko Sakkinen 2018-04-24 17:48 ` Jarkko Sakkinen 2018-04-24 17:48 ` Jarkko Sakkinen 2018-04-24 20:10 ` Winkler, Tomas 2018-04-24 20:10 ` Winkler, Tomas 2018-04-24 20:04 ` Winkler, Tomas 2018-04-24 20:04 ` Winkler, Tomas 2018-05-02 13:32 ` Jarkko Sakkinen 2018-05-02 13:32 ` Jarkko Sakkinen 2018-05-02 13:35 ` Winkler, Tomas 2018-05-02 13:35 ` Winkler, Tomas 2018-05-03 6:35 ` Jarkko Sakkinen 2018-05-03 6:35 ` Jarkko Sakkinen 2018-05-03 6:42 ` Winkler, Tomas 2018-05-03 6:42 ` Winkler, Tomas 2018-05-04 8:16 ` Jarkko Sakkinen 2018-05-04 8:16 ` Jarkko Sakkinen 2018-05-05 21:07 ` Winkler, Tomas 2018-05-05 21:07 ` Winkler, Tomas 2018-05-09 12:26 ` Jarkko Sakkinen 2018-05-09 12:26 ` Jarkko Sakkinen 2018-05-09 21:49 ` Winkler, Tomas 2018-05-09 21:49 ` Winkler, Tomas 2018-05-11 10:18 ` Jarkko Sakkinen 2018-05-11 10:18 ` Jarkko Sakkinen
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