diff options
Diffstat (limited to 'lib/ubsan.c')
| -rw-r--r-- | lib/ubsan.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/ubsan.c b/lib/ubsan.c index 60c7099857a0..6620e0719c9d 100644 --- a/lib/ubsan.c +++ b/lib/ubsan.c @@ -14,10 +14,76 @@ #include <linux/types.h> #include <linux/sched.h> #include <linux/uaccess.h> +#include <linux/ubsan.h> #include <kunit/test-bug.h> #include "ubsan.h" +#ifdef CONFIG_UBSAN_TRAP +/* + * Only include matches for UBSAN checks that are actually compiled in. + * The mappings of struct SanitizerKind (the -fsanitize=xxx args) to + * enum SanitizerHandler (the traps) in Clang is in clang/lib/CodeGen/. + */ +const char *report_ubsan_failure(struct pt_regs *regs, u32 check_type) +{ + switch (check_type) { +#ifdef CONFIG_UBSAN_BOUNDS + /* + * SanitizerKind::ArrayBounds and SanitizerKind::LocalBounds + * emit SanitizerHandler::OutOfBounds. + */ + case ubsan_out_of_bounds: + return "UBSAN: array index out of bounds"; +#endif +#ifdef CONFIG_UBSAN_SHIFT + /* + * SanitizerKind::ShiftBase and SanitizerKind::ShiftExponent + * emit SanitizerHandler::ShiftOutOfBounds. + */ + case ubsan_shift_out_of_bounds: + return "UBSAN: shift out of bounds"; +#endif +#ifdef CONFIG_UBSAN_DIV_ZERO + /* + * SanitizerKind::IntegerDivideByZero emits + * SanitizerHandler::DivremOverflow. + */ + case ubsan_divrem_overflow: + return "UBSAN: divide/remainder overflow"; +#endif +#ifdef CONFIG_UBSAN_UNREACHABLE + /* + * SanitizerKind::Unreachable emits + * SanitizerHandler::BuiltinUnreachable. + */ + case ubsan_builtin_unreachable: + return "UBSAN: unreachable code"; +#endif +#if defined(CONFIG_UBSAN_BOOL) || defined(CONFIG_UBSAN_ENUM) + /* + * SanitizerKind::Bool and SanitizerKind::Enum emit + * SanitizerHandler::LoadInvalidValue. + */ + case ubsan_load_invalid_value: + return "UBSAN: loading invalid value"; +#endif +#ifdef CONFIG_UBSAN_ALIGNMENT + /* + * SanitizerKind::Alignment emits SanitizerHandler::TypeMismatch + * or SanitizerHandler::AlignmentAssumption. + */ + case ubsan_alignment_assumption: + return "UBSAN: alignment assumption"; + case ubsan_type_mismatch: + return "UBSAN: type mismatch"; +#endif + default: + return "UBSAN: unrecognized failure code"; + } +} + +#else static const char * const type_check_kinds[] = { "load of", "store to", @@ -384,3 +450,5 @@ void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr, ubsan_epilogue(); } EXPORT_SYMBOL(__ubsan_handle_alignment_assumption); + +#endif /* !CONFIG_UBSAN_TRAP */ |