[PAL] Fix attestation LibOS regression test for UBSan
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kailun-qin
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mkow
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UBSan detects an uninitialized boolean variable on a DCAP SGX machine on
the remote attestation example, failing with the message:
error: ubsan: load of invalid value for bool or enum: 100
error: ubsan: ../pal/src/host/linux-sgx/pal_misc.c:724:43
This happens because `bool linkable` variable is assigned only in the
EPID attestation scheme, but left unassigned in the DCAP scheme. This
commit fixes this (though it's not a bug since DCAP never uses
`linkable` anyway). Hence, UBSan doesn't complain anymore.
Signed-off-by: Dmitrii Kuvaiskii <[email protected]>
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mkow
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Sep 26, 2024
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Description of the changes
UBSan detects an uninitialized boolean variable on a DCAP SGX machine on the remote attestation example, failing with the message:
This happens because
bool linkablevariable is assigned only in the EPID attestation scheme, but left unassigned in the DCAP scheme. This commit fixes this (though it's not a bug since DCAP never useslinkableanyway). Hence, UBSan doesn't complain anymore.Reported by @woju
How to test this PR?
Run LibOS regression test
attestationon Ubuntu 24.04 + UBSan enabled + DCAP attestation.This change is