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Type: Bug
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Resolution: Fixed
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Priority: Major - P3
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Affects Version/s: 8.0.0-rc0
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Component/s: Internal Code
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Storage Execution
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Fully Compatible
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ALL
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Execution Team 2024-04-29
Out-of-bounds read
Incorrect values read from a different memory region will cause incorrect computations. Out-of-bounds read from a buffer
/src/mongo/db/storage/key_string.cpp:946: OVERRUN 140316 Function call "mongo::countLeadingZeros64(integerPart << 1)" may return 64.
/src/mongo/db/storage/key_string.cpp:946: OVERRUN 140316 Assigning: "fractionalBytes" = "mongo::countLeadingZeros64(integerPart << 1) / 8". The value of "fractionalBytes" is now 8.
/src/mongo/db/storage/key_string.cpp:953: OVERRUN 140316 Overrunning array "mongo::key_string::<unnamed>::kPow256" of 8 8-byte elements at element index 8 (byte offset 71) using index "fractionalBytes" (which evaluates to 8).