[Bug sanitizer/101476] AddressSanitizer check failed, points out a (potentially) non-existing stack error and pthread_cancel

["stsp at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101476

--- Comment #16 from Stas Sergeev <stsp at users dot sourceforge.net> ---
I think I'll propose to apply something like this to linux kernel:

diff --git a/kernel/signal.c b/kernel/signal.c
index 6f3476dc7873..0549212a8dd6 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -4153,6 +4153,7 @@ do_sigaltstack (const stack_t *ss, stack_t *oss, unsigned
long sp,
                if (ss_mode == SS_DISABLE) {
                        ss_size = 0;
                        ss_sp = NULL;
+                       ss_flags = SS_DISABLE;
                } else {
                        if (unlikely(ss_size < min_ss_size))
                                ret = -ENOMEM;