jemalloc/include
Slobodan Predolac dfb276f035 Speculative fix for Veracode integer overflow/underflow in sz.h
Veracode flags CWE-190/191 on the `size + mask` round-ups in
sz_s2u_compute_using_delta, sz_s2u_compute and sz_sa2u. We believe these are
false positives: the arithmetic is unsigned size_t (overflow is well-defined in
C, not UB), `size` is already bounded by the SC_LARGE_MAXCLASS guard, and the
masks are tiny, so the additions cannot actually overflow.

CodeQL's security-extended suite (CWE-190/191) does not flag these. Its
uncontrolled-arithmetic query only reports *signed* overflow ("unsigned overflow
is well-defined"), and its tainted-arithmetic query credits the existing
upper-bound guard. Veracode instead treats the public-API size/alignment as
tainted and ignores guards placed above the expression, so piling on more
pre-checks does not satisfy it.

Effect on the malloc/free hot path is zero instructions as verified with
clang -O3 and ThinLTO objdump
2026-06-16 21:02:51 -04:00
..
jemalloc Speculative fix for Veracode integer overflow/underflow in sz.h 2026-06-16 21:02:51 -04:00
msvc_compat Reformat the codebase with the clang-format 18. 2026-03-10 18:14:33 -07:00