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From: Bhaumik Bhatt <bbhatt@codeaurora.org>
To: manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	loic.poulain@linaro.org, linux-wireless@vger.kernel.org,
	kvalo@codeaurora.org, ath11k@lists.infradead.org,
	Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe
Date: Thu,  6 May 2021 12:51:45 -0700	[thread overview]
Message-ID: <1620330705-40192-7-git-send-email-bbhatt@codeaurora.org> (raw)
In-Reply-To: <1620330705-40192-1-git-send-email-bbhatt@codeaurora.org>

When obtaining the BHI or BHIe offsets during the power up
preparation phase, range checks are missing. These can help
controller drivers avoid accessing any address outside of the
MMIO region. Ensure that mhi_cntrl->reg_len is set before MHI
registration as it is a required field and range checks will
fail without it.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
---
 drivers/bus/mhi/core/init.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 1cc2f22..aeb1e3c 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -885,7 +885,8 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
 	if (!mhi_cntrl || !mhi_cntrl->cntrl_dev || !mhi_cntrl->regs ||
 	    !mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
 	    !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
-	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || !mhi_cntrl->irq)
+	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs ||
+	    !mhi_cntrl->irq || !mhi_cntrl->reg_len)
 		return -EINVAL;
 
 	ret = parse_config(mhi_cntrl, config);
@@ -1077,6 +1078,13 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
 		dev_err(dev, "Error getting BHI offset\n");
 		goto error_reg_offset;
 	}
+
+	if (bhi_off >= mhi_cntrl->reg_len) {
+		dev_err(dev, "BHI offset: 0x%x is out of range: 0x%zx\n",
+			bhi_off, mhi_cntrl->reg_len);
+		ret = -EINVAL;
+		goto error_reg_offset;
+	}
 	mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off;
 
 	if (mhi_cntrl->fbc_download || mhi_cntrl->rddm_size) {
@@ -1086,6 +1094,14 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
 			dev_err(dev, "Error getting BHIE offset\n");
 			goto error_reg_offset;
 		}
+
+		if (bhie_off >= mhi_cntrl->reg_len) {
+			dev_err(dev,
+				"BHIe offset: 0x%x is out of range: 0x%zx\n",
+				bhie_off, mhi_cntrl->reg_len);
+			ret = -EINVAL;
+			goto error_reg_offset;
+		}
 		mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
 	}
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


WARNING: multiple messages have this Message-ID
From: Bhaumik Bhatt <bbhatt@codeaurora.org>
To: manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	loic.poulain@linaro.org, linux-wireless@vger.kernel.org,
	kvalo@codeaurora.org, ath11k@lists.infradead.org,
	Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe
Date: Thu,  6 May 2021 12:51:45 -0700	[thread overview]
Message-ID: <1620330705-40192-7-git-send-email-bbhatt@codeaurora.org> (raw)
In-Reply-To: <1620330705-40192-1-git-send-email-bbhatt@codeaurora.org>

When obtaining the BHI or BHIe offsets during the power up
preparation phase, range checks are missing. These can help
controller drivers avoid accessing any address outside of the
MMIO region. Ensure that mhi_cntrl->reg_len is set before MHI
registration as it is a required field and range checks will
fail without it.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
---
 drivers/bus/mhi/core/init.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 1cc2f22..aeb1e3c 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -885,7 +885,8 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
 	if (!mhi_cntrl || !mhi_cntrl->cntrl_dev || !mhi_cntrl->regs ||
 	    !mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
 	    !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
-	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || !mhi_cntrl->irq)
+	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs ||
+	    !mhi_cntrl->irq || !mhi_cntrl->reg_len)
 		return -EINVAL;
 
 	ret = parse_config(mhi_cntrl, config);
@@ -1077,6 +1078,13 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
 		dev_err(dev, "Error getting BHI offset\n");
 		goto error_reg_offset;
 	}
+
+	if (bhi_off >= mhi_cntrl->reg_len) {
+		dev_err(dev, "BHI offset: 0x%x is out of range: 0x%zx\n",
+			bhi_off, mhi_cntrl->reg_len);
+		ret = -EINVAL;
+		goto error_reg_offset;
+	}
 	mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off;
 
 	if (mhi_cntrl->fbc_download || mhi_cntrl->rddm_size) {
@@ -1086,6 +1094,14 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
 			dev_err(dev, "Error getting BHIE offset\n");
 			goto error_reg_offset;
 		}
+
+		if (bhie_off >= mhi_cntrl->reg_len) {
+			dev_err(dev,
+				"BHIe offset: 0x%x is out of range: 0x%zx\n",
+				bhie_off, mhi_cntrl->reg_len);
+			ret = -EINVAL;
+			goto error_reg_offset;
+		}
 		mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
 	}
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


-- 
ath11k mailing list
ath11k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath11k

  parent reply	other threads:[~2021-05-06 19:52 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 19:51 [PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes Bhaumik Bhatt
2021-05-06 19:51 ` Bhaumik Bhatt
2021-05-06 19:51 ` [PATCH v4 1/6] bus: mhi: core: Set BHI/BHIe offsets on power up preparation Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:36   ` Manivannan Sadhasivam
2021-05-21 13:36     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:37   ` Manivannan Sadhasivam
2021-05-21 13:37     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 3/6] bus: mhi: Add MMIO region length to controller structure Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:38   ` Manivannan Sadhasivam
2021-05-21 13:38     ` Manivannan Sadhasivam
2021-05-06 19:51 ` [PATCH v4 4/6] ath11k: set register access length for MHI driver Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:51   ` Manivannan Sadhasivam
2021-05-21 13:51     ` Manivannan Sadhasivam
2021-06-14 16:02     ` Kalle Valo
2021-06-14 16:02       ` Kalle Valo
2021-06-14 17:49       ` Bhaumik Bhatt
2021-06-14 17:49         ` Bhaumik Bhatt
2021-06-16 17:38         ` Bhaumik Bhatt
2021-06-16 17:38           ` Bhaumik Bhatt
2021-06-18  6:45           ` Manivannan Sadhasivam
2021-06-18  6:45             ` Manivannan Sadhasivam
2021-06-23 17:29             ` Kalle Valo
2021-06-23 17:29               ` Kalle Valo
2021-06-24  6:09               ` Manivannan Sadhasivam
2021-06-24  6:09                 ` Manivannan Sadhasivam
2021-06-23 17:34         ` Kalle Valo
2021-06-23 17:34           ` Kalle Valo
2021-06-23 21:33           ` Bhaumik Bhatt
2021-06-23 21:33             ` Bhaumik Bhatt
2021-05-06 19:51 ` [PATCH v4 5/6] bus: mhi: pci_generic: Set " Bhaumik Bhatt
2021-05-06 19:51   ` Bhaumik Bhatt
2021-05-21 13:52   ` Manivannan Sadhasivam
2021-05-21 13:52     ` Manivannan Sadhasivam
2021-05-06 19:51 ` Bhaumik Bhatt [this message]
2021-05-06 19:51   ` [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe Bhaumik Bhatt
2021-05-07  2:33   ` Hemant Kumar
2021-05-07  2:33     ` Hemant Kumar
2021-05-21 13:54   ` Manivannan Sadhasivam
2021-05-21 13:54     ` Manivannan Sadhasivam
2021-06-25  5:28 ` [PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes Manivannan Sadhasivam
2021-06-25  5:28   ` Manivannan Sadhasivam
  -- strict thread matches above, loose matches on Subject: below --
2021-05-06 19:32 Bhaumik Bhatt
2021-05-06 19:32 ` [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe Bhaumik Bhatt
2021-05-06 19:32   ` Bhaumik Bhatt

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