https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111736
--- Comment #39 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Uros Bizjak <u...@gcc.gnu.org>: https://gcc.gnu.org/g:624c3bb9ff762f196852dc77233610d1cdf7d7be commit r11-11351-g624c3bb9ff762f196852dc77233610d1cdf7d7be Author: Jakub Jelinek <ja...@redhat.com> Date: Fri Mar 22 09:23:44 2024 +0100 ubsan: Don't -fsanitize=null instrument __seg_fs/gs pointers [PR111736] On x86 and avr some address spaces allow 0 pointers (on avr actually even generic as, but libsanitizer isn't ported to it and I'm not convinced we should completely kill -fsanitize=null in that case). The following patch makes sure those aren't diagnosed for -fsanitize=null, though they are still sanitized for -fsanitize=alignment. 2024-03-22 Jakub Jelinek <ja...@redhat.com> gcc/ChangeLog: PR sanitizer/111736 * ubsan.c (ubsan_expand_null_ifn, instrument_mem_ref): Avoid SANITIZE_NULL instrumentation for non-generic address spaces for which targetm.addr_space.zero_address_valid (as) is true. gcc/testsuite/ChangeLog: * gcc.dg/ubsan/pr111736.c: New test. (cherry picked from commit ddd4a3ca87410886b039cc225907b4f6e650082e)
