The kernel issue https://gitee.com/openeuler/kernel/issues/I7TEYD have reported 2 TCM(TPM like chip, by Nationz Technologies Inc.) driver CVE issues.
【Vulnerability information】
There may be information leakage vulnerabilities in the tcm_read function and tcm_open function in drivers/staging/gmjstcm/tcm.c
The tcm_read function did not set this memory to 0 after calling the copy_to_user function, causing the user to read the information in the last tcm instruction.
The tcm_open function does not set the memory block to 0 when allocating memory (kmalloc), which may lead to information leakage vulnerabilities.

Here are the two fixes for TPM:

1. CVE-2011-1160
   commit 1309d7afbed1 ("char/tpm: Fix unitialized usage of data buffer")
2. CVE-2011-1162
   commit 3321c07ae506 ("TPM: Zero buffer after copying to userspace")

Now we import and apply such 2 fixes to TCM1.0 driver in drivers/staging/gmjstcm/ dir.

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