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Date: Tue, 02 Nov 2021 13:22:19 -0500 From: ebiederm@...ssion.com (Eric W. Biederman) To: Kees Cook <keescook@...omium.org> Cc: Andrea Righi <andrea.righi@...onical.com>, Shuah Khan <shuah@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Andy Lutomirski <luto@...capital.net>, Will Drewry <wad@...omium.org>, linux-kselftest@...r.kernel.org, bpf@...r.kernel.org, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org Subject: Re: selftests: seccomp_bpf failure on 5.15 Kees Cook <keescook@...omium.org> writes: > On Thu, Oct 28, 2021 at 05:06:53PM -0500, Eric W. Biederman wrote: >> Kees Cook <keescook@...omium.org> writes: >> >> > On Thu, Oct 28, 2021 at 12:26:26PM -0500, Eric W. Biederman wrote: >> >> Is it a problem that the debugger can see the signal if the process does >> not? > > Right, I'm trying to understand that too. However, my neighbor just lost > power. :| > > What I was in the middle of checking was what ptrace "sees" going > through a fatal SIGSYS; my initial debugging attempts were weird. Kees have you regained power and had a chance to see my SA_IMMUTABLE patch? Does what I implemented seem like it will work for you? I think it is a solid and simple solution to a pair of problems with my change to use the ordinary coredump path for seccomp. But I would very much love to hear it seems reasonable to you, as you were looking at the problem as well. Eric
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