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Kenrel: Implement two more KUBSAN checks

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This patch adds the following UndefinedBehaviorSanitizer sub-options:

* signed-integer-overflow
* vla-bound
This commit is contained in:
Andreas Kling 2021-02-05 20:03:07 +01:00
parent 8e7ad28a33
commit d164f89ada
3 changed files with 51 additions and 7 deletions
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46
Kernel/UBSanitizer.cpp
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@ -36,21 +36,55 @@ extern "C" {
static void print_location(const SourceLocation& location)
{
dbgln("KUBSAN: at {}, line {}, column: {}", location.filename(), location.line(), location.column());
dump_backtrace();
}
void __ubsan_handle_load_invalid_value(InvalidValueData&, void*);
void __ubsan_handle_load_invalid_value(InvalidValueData& data, void*)
void __ubsan_handle_load_invalid_value(const InvalidValueData&, void*);
void __ubsan_handle_load_invalid_value(const InvalidValueData& data, void*)
{
dbgln("KUBSAN: load-invalid-value: {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
dump_backtrace();
}
void __ubsan_handle_nonnull_arg(NonnullArgData&);
void __ubsan_handle_nonnull_arg(NonnullArgData& data)
void __ubsan_handle_nonnull_arg(const NonnullArgData&);
void __ubsan_handle_nonnull_arg(const NonnullArgData& data)
{
dbgln("KUBSAN: null pointer passed as argument {}, which is declared to never be null", data.argument_index);
print_location(data.location);
dump_backtrace();
}
void __ubsan_handle_vla_bound_not_positive(const VLABoundData&, void*);
void __ubsan_handle_vla_bound_not_positive(const VLABoundData& data, void*)
{
dbgln("KUBSAN: VLA bound not positive {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_add_overflow(const OverflowData&, void* lhs, void* rhs);
void __ubsan_handle_add_overflow(const OverflowData& data, void*, void*)
{
dbgln("KUBSAN: addition overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_sub_overflow(const OverflowData&, void* lhs, void* rhs);
void __ubsan_handle_sub_overflow(const OverflowData& data, void*, void*)
{
dbgln("KUBSAN: subtraction overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_negate_overflow(const OverflowData&, void*);
void __ubsan_handle_negate_overflow(const OverflowData& data, void*)
{
dbgln("KUBSAN: negation overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_mul_overflow(const OverflowData&, void* lhs, void* rhs);
void __ubsan_handle_mul_overflow(const OverflowData& data, void*, void*)
{
dbgln("KUBSAN: multiplication overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
}