On Thu, Mar 25, 2021 at 09:11:56PM +0000, Bae, Chang Seok wrote:

But if sigaltstack()’ed with the SS_AUTODISARM flag, both on_sig_stack() and
sas_ss_flags() return 0 [1]. Then, segfault always here. v5 had the exact
issue before [2].

Ah, there's that SS_AUTODISARM check above it which I missed, sorry.

I guess we can do a __on_sig_stack() helper or so which does the stack
check only without the SS_AUTODISARM. Just for readability's sake in
what is already a pretty messy function.

Thx.

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Regards/Gruss,
    Boris.

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