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ASAN: Support detect_invalid_pointer_pairs=1 with detect_stack_use_after_return=1 

Do not crash when AsanThread::GetStackVariableShadowStart does not find
a variable for a pointer on a shadow stack.

Cherry-pick from ad2be02a833e56f7fe280797280b219eb3312621.

Differential Revision: https://reviews.llvm.org/D89552
This commit is contained in:
Martin Liska 2020-10-16 15:08:52 +02:00
parent 38aca14a43
commit b69f33f477
1 changed files with 3 additions and 1 deletions
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4
libsanitizer/asan/asan_thread.cpp
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@ -366,7 +366,9 @@ uptr AsanThread::GetStackVariableShadowStart(uptr addr) {
bottom = stack_bottom();
} else if (has_fake_stack()) {
bottom = fake_stack()->AddrIsInFakeStack(addr);
CHECK(bottom);
if (bottom == 0) {
return 0;
}
} else {
return 0;
}