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fixing bounds checks on u32 and u64 vectors

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Alex Shinn 2019-02-21 02:55:35 +08:00
parent a5a7345df9
commit 7b3413ec1a
1 changed files with 4 additions and 2 deletions
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6
sexp.c
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@ -2955,7 +2955,8 @@ static int sexp_resolve_uniform_type(int c, sexp len) {
#endif
sexp sexp_list_to_uvector_op(sexp ctx, sexp self, sexp_sint_t n, sexp etype, sexp ls) {
int et, i, min, max;
long et, i, min;
unsigned long max;
sexp ls2, tmp;
sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, etype);
sexp_gc_var1(res);
@ -2967,7 +2968,8 @@ sexp sexp_list_to_uvector_op(sexp ctx, sexp self, sexp_sint_t n, sexp etype, sex
et = sexp_unbox_fixnum(etype);
res = et == SEXP_U8 ? sexp_make_bytes(ctx, sexp_length(ctx, ls), SEXP_VOID) : sexp_make_uvector(ctx, etype, sexp_length(ctx, ls));
min = 0;
max = (1 << sexp_uvector_element_size(et)) - 1;
max = sexp_uvector_element_size(et) == 64 ? -1 :
(1uL << sexp_uvector_element_size(et)) - 1;
if (sexp_uvector_prefix(et) == 's') {
min = -(max/2) - 1;
max = (max/2);