drivers/gmjstcm: import CVE-2011-1160 CVE-2011-1162 fixes to tcm.c

kylin inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7TEYD

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https://gitee.com/openeuler/kernel/issues/I7TEYD

 report 2 bugs
in gmjstcm driver, reported as CVEs in kernel tpm driver.
[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 1309d7af ("char/tpm: Fix unitialized usage of data buffer")
2. CVE-2011-1162
  commit 3321c07a ("TPM: Zero buffer after copying to userspace")

import 2 fixes from tpm.c to tcm.c

Signed-off-by: Li ZhiGang <lizhigang@kylinos.cn>