stefanberger / libtpms / 1772

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tpm2: Address issues detected by cppcheck (false positives)

cppcheck has detected the following issues in 2 functions. However,
neither one of the out-of-bounds array access can happen with the
existing code (see comments in patch).

src/tpm2/Session.c:399:5: note: After for loop, slotIndex has value 3
    for(slotIndex = 0; slotIndex < MAX_LOADED_SESSIONS; slotIndex++)
    ^
src/tpm2/Session.c:414:15: note: Assuming condition is false
    if(result != TPM_RC_SUCCESS)
              ^
src/tpm2/Session.c:419:15: note: Array index out of bounds
    s_sessions[slotIndex].occupied = TRUE;
              ^
src/tpm2/Session.c:591:27: error: Array 's_sessions[3]' accessed at index 3, which is out of bounds. [arrayIndexOutOfBounds]
    MemoryCopy(&s_sessions[slotIndex].session, session, sizeof(SESSION));
                          ^
src/tpm2/Session.c:571:5: note: After for loop, slotIndex has value 3
    for(slotIndex = 0; slotIndex < MAX_LOADED_SESSIONS; slotIndex++)
    ^
src/tpm2/Session.c:581:8: note: Assuming condition is false
       && contextIndex != s_oldestSavedSession)
       ^
src/tpm2/Session.c:591:27: note: Array index out of bounds
    MemoryCopy(&s_sessions[slotIndex].session, session, sizeof(SESSION));
                          ^

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>

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28369 of 36842 relevant lines covered (77.0%)

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