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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1fbc5e9535
When no i2c bus exists, user-space can cause an oops by triggering a device probe through a message sent to an i2c "new_device" sysfs entry. Adding a check for a NULL i2c client structure in the probe function closes the hole. This patch also fixes accessing the NULL client struct in the print function call reporting the error. Reported-by: Peter Hüwe <PeterHuewe@gmx.de> Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
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* Copyright (C) 2009, 2010 STMicroelectronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* STMicroelectronics version 1.2.0, Copyright (C) 2010
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* STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
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* This is free software, and you are welcome to redistribute it
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* under certain conditions.
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*
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* @Author: Christophe RICARD tpmsupport@st.com
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*
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* @File: stm_st33_tpm_i2c.h
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*
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* @Date: 09/15/2010
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*/
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#ifndef __STM_ST33_TPM_I2C_MAIN_H__
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#define __STM_ST33_TPM_I2C_MAIN_H__
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#define TPM_ACCESS (0x0)
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#define TPM_STS (0x18)
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#define TPM_HASH_END (0x20)
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#define TPM_DATA_FIFO (0x24)
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#define TPM_HASH_DATA (0x24)
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#define TPM_HASH_START (0x28)
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#define TPM_INTF_CAPABILITY (0x14)
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#define TPM_INT_STATUS (0x10)
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#define TPM_INT_ENABLE (0x08)
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#define TPM_DUMMY_BYTE 0xAA
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#define TPM_WRITE_DIRECTION 0x80
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#define TPM_HEADER_SIZE 10
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#define TPM_BUFSIZE 2048
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#define LOCALITY0 0
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#define TPM_ST33_I2C "st33zp24_i2c"
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struct st33zp24_platform_data {
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int io_serirq;
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int io_lpcpd;
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struct i2c_client *client;
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u8 *tpm_i2c_buffer[2]; /* 0 Request 1 Response */
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struct completion irq_detection;
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struct mutex lock;
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};
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#endif /* __STM_ST33_TPM_I2C_MAIN_H__ */
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