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Kernel: Improve KUBSAN logging for "type mismatch" errors

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Parse out some more information about the error from the data we get.
This commit is contained in:
Andreas Kling 2021-02-24 14:27:06 +01:00
parent 6ad3454bfb
commit 99cd0d3ffb
1 changed files with 27 additions and 2 deletions
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29
Kernel/UBSanitizer.cpp
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@ -140,9 +140,34 @@ void __ubsan_handle_out_of_bounds(const OutOfBoundsData& data, ValueHandle)
}
void __ubsan_handle_type_mismatch_v1(const TypeMismatchData&, ValueHandle);
void __ubsan_handle_type_mismatch_v1(const TypeMismatchData& data, ValueHandle)
void __ubsan_handle_type_mismatch_v1(const TypeMismatchData& data, ValueHandle ptr)
{
dbgln("KUBSAN: type mismatch, {} ({}-bit)", data.type.name(), data.type.bit_width());
static const char* kinds[] = {
"load of",
"store to",
"reference binding to",
"member access within",
"member call on",
"constructor call on",
"downcast of",
"downcast of",
"upcast of",
"cast to virtual base of",
"_Nonnull binding to",
"dynamic operation on"
};
FlatPtr alignment = (FlatPtr)1 << data.log_alignment;
auto* kind = kinds[data.type_check_kind];
if (!ptr) {
dbgln("KUBSAN: {} null pointer of type {}", kind, data.type.name());
} else if ((FlatPtr)ptr & (alignment - 1)) {
dbgln("KUBSAN: {} misaligned address {:p} of type {}", kind, ptr, data.type.name());
} else {
dbgln("KUBSAN: {} address {:p} with insufficient space for type {}", kind, ptr, data.type.name());
}
print_location(data.location);
}