From: Linus Torvalds <torvalds@linux-foundation.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>,
Steven Rostedt <rostedt@kernel.org>,
linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org,
x86@kernel.org, Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrii Nakryiko <andrii@kernel.org>,
Indu Bhagat <indu.bhagat@oracle.com>,
"Jose E. Marchesi" <jemarch@gnu.org>,
Beau Belgrave <beaub@linux.microsoft.com>,
Jens Remus <jremus@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>,
Florian Weimer <fweimer@redhat.com>, Sam James <sam@gentoo.org>
Subject: Re: [PATCH v8 10/12] unwind_user/sframe: Enable debugging in uaccess regions
Date: Tue, 8 Jul 2025 08:53:56 -0700 [thread overview]
Message-ID: <CAHk-=wgXcc99EXKfK++FEQzMQc8S16WOwvn=1DcP_ns1jCCYeA@mail.gmail.com> (raw)
In-Reply-To: <20250708104130.25b76df9@gandalf.local.home>
On Tue, 8 Jul 2025 at 07:41, Steven Rostedt <rostedt@goodmis.org> wrote:
>
> Would something like this work? If someone enables the config to enable the
> validation, I don't think we need dynamic printk to do it (as that requires
> passing in the format directly and not via a pointer).
I really think you should just not use 'user_access_begin()" AT ALL if
you need to play these kinds of games.
Linus
next prev parent reply other threads:[~2025-07-08 15:54 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-08 2:11 [PATCH v8 00/12] unwind_deferred: Implement sframe handling Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 01/12] unwind_user/sframe: Add support for reading .sframe headers Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 02/12] unwind_user/sframe: Store sframe section data in per-mm maple tree Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 03/12] x86/uaccess: Add unsafe_copy_from_user() implementation Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 04/12] unwind_user/sframe: Add support for reading .sframe contents Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 05/12] unwind_user/sframe: Detect .sframe sections in executables Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 06/12] unwind_user/sframe: Wire up unwind_user to sframe Steven Rostedt
2025-07-08 19:58 ` Mathieu Desnoyers
2025-07-08 20:11 ` Steven Rostedt
2025-07-09 7:58 ` Jens Remus
2025-07-09 13:46 ` Mathieu Desnoyers
2025-07-09 13:51 ` Mathieu Desnoyers
2025-07-09 14:06 ` Steven Rostedt
2025-07-09 14:10 ` Mathieu Desnoyers
2025-07-09 14:29 ` Steven Rostedt
2025-07-09 15:14 ` Mathieu Desnoyers
2025-07-10 8:03 ` Jens Remus
2025-07-10 9:26 ` Jens Remus
2025-07-10 15:30 ` Steven Rostedt
2025-07-10 20:51 ` Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 07/12] unwind_user/sframe/x86: Enable sframe unwinding on x86 Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 08/12] unwind_user/sframe: Remove .sframe section on detected corruption Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 09/12] unwind_user/sframe: Show file name in debug output Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 10/12] unwind_user/sframe: Enable debugging in uaccess regions Steven Rostedt
2025-07-08 3:38 ` Linus Torvalds
2025-07-08 13:23 ` Steven Rostedt
2025-07-08 14:34 ` Josh Poimboeuf
2025-07-08 14:41 ` Steven Rostedt
2025-07-08 15:53 ` Linus Torvalds [this message]
2025-07-08 16:31 ` Steven Rostedt
2025-07-08 18:57 ` Josh Poimboeuf
2025-07-08 15:52 ` Linus Torvalds
2025-07-08 2:11 ` [PATCH v8 11/12] unwind_user/sframe: Add .sframe validation option Steven Rostedt
2025-07-08 2:11 ` [PATCH v8 12/12] unwind_user/sframe: Add prctl() interface for registering .sframe sections Steven Rostedt
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