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json: turn off ubsan for json_variant_has_type()

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Fixes: #15907
This commit is contained in:
Lennart Poettering 2020-05-25 18:21:08 +02:00
parent 6028d766d1
commit 8e2fa6e223
2 changed files with 12 additions and 1 deletions
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8
src/basic/macro.h
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@ -84,6 +84,14 @@
#define _variable_no_sanitize_address_
#endif
/* Apparently there's no has_feature() call defined to check for ubsan, hence let's define this
* unconditionally on llvm */
#if defined(__clang__)
#define _function_no_sanitize_float_cast_overflow_ __attribute__((no_sanitize("float-cast-overflow")))
#else
#define _function_no_sanitize_float_cast_overflow_
#endif
/* Temporarily disable some warnings */
#define DISABLE_WARNING_FORMAT_NONLITERAL \
_Pragma("GCC diagnostic push"); \

5
src/shared/json.c
View File

@ -1093,9 +1093,12 @@ JsonVariantType json_variant_type(JsonVariant *v) {
return v->type;
}
bool json_variant_has_type(JsonVariant *v, JsonVariantType type) {
_function_no_sanitize_float_cast_overflow_ bool json_variant_has_type(JsonVariant *v, JsonVariantType type) {
JsonVariantType rt;
/* Note: we turn off ubsan float cast overflo detection for this function, since it would complain
* about our float casts but we do them explicitly to detect conversion errors. */
v = json_variant_dereference(v);
if (!v)
return false;