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Kernel: Expose sysctl 'ubsan_is_deadly' to panic the Kernel on UB
This makes it easier to find UB, for example when fuzzing the Kernel.
This can be enabled by default, thanks to @boricj's work in
32e1354b9b
.
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3 changed files with 14 additions and 1 deletions
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@ -26,22 +26,26 @@
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#include <AK/Format.h>
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#include <Kernel/KSyms.h>
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#include <Kernel/Panic.h>
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#include <Kernel/UBSanitizer.h>
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using namespace Kernel;
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using namespace Kernel::UBSanitizer;
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bool Kernel::UBSanitizer::g_ubsan_is_deadly { true };
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extern "C" {
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static void print_location(const SourceLocation& location)
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{
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if (!location.filename()) {
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dbgln("KUBSAN: in unknown file");
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} else {
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dbgln("KUBSAN: at {}, line {}, column: {}", location.filename(), location.line(), location.column());
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}
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dump_backtrace();
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if (g_ubsan_is_deadly)
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PANIC("UB is configured to be deadly.");
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}
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void __ubsan_handle_load_invalid_value(const InvalidValueData&, ValueHandle);
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