[gnutls-devel] GnuTLS | Undefined behavior in _gnutls_resolve_priorities() (#1940)

[(Deprecated) Read-only notification of GnuTLS library development activities]

Issue created by Tim Rühsen: https://gitlab.com/gnutls/gnutls/-/work_items/1940



At https://gitlab.com/gnutls/gnutls/-/blob/master/lib/priority.c?ref_type=heads#L2560, we subtract a potential NULL pointer (`additional`) and a non-NULL pointer (`ss_next`), which is UB.

This is a finding of `scan-build` 22.

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