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Date: Fri, 19 Nov 2021 08:07:36 -0800 From: Kyle Huey <me@...ehuey.com> To: "Eric W. Biederman" <ebiederm@...ssion.com> Cc: Kees Cook <keescook@...omium.org>, Linus Torvalds <torvalds@...ux-foundation.org>, 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>, "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, bpf <bpf@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, linux-hardening@...r.kernel.org, "Robert O'Callahan" <rocallahan@...il.com> Subject: Re: [REGRESSION] 5.16rc1: SA_IMMUTABLE breaks debuggers On Thu, Nov 18, 2021 at 8:12 AM Eric W. Biederman <ebiederm@...ssion.com> wrote: > Kyle thank you for your explanation of what breaks. For future kernels > I do need to do some work in this area and I will copy on the patches > going forward. In particular I strongly suspect that changing the > sigaction and blocked state of the signal for these synchronous signals > is the wrong thing to do, especially if the process is not killed. I > want to find another solution that does not break things but that also > does not change the program state behind the programs back so things > work differently under the debugger. The heads up in the future is appreciated, thanks. - Kyle
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