linux-kernel - [PATCH v2] char: tpm: fix error return code in tpm_cr50_i2c_tis

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Date:   Fri, 9 Apr 2021 09:12:01 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <jarkko@...nel.org>, <peterhuewe@....de>
CC:     <linux-integrity@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <chengzhihao1@...wei.com>, <yi.zhang@...wei.com>,
        <yukuai3@...wei.com>
Subject: [PATCH v2] char: tpm: fix error return code in tpm_cr50_i2c_tis_recv()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 3a253caaad11 ("char: tpm: add i2c driver for cr50")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
---
 drivers/char/tpm/tpm_tis_i2c_cr50.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/tpm/tpm_tis_i2c_cr50.c b/drivers/char/tpm/tpm_tis_i2c_cr50.c
index ec9a65e7887d..f19c227d20f4 100644
--- a/drivers/char/tpm/tpm_tis_i2c_cr50.c
+++ b/drivers/char/tpm/tpm_tis_i2c_cr50.c
@@ -483,6 +483,7 @@ static int tpm_cr50_i2c_tis_recv(struct tpm_chip *chip, u8 *buf, size_t buf_len)
 	expected = be32_to_cpup((__be32 *)(buf + 2));
 	if (expected > buf_len) {
 		dev_err(&chip->dev, "Buffer too small to receive i2c data\n");
+		rc = -E2BIG;
 		goto out_err;
 	}
 
-- 
2.25.4