From: Steven Rostedt <rostedt@goodmis.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Jordan Rife <jrife@google.com>,
acme@kernel.org, alexander.shishkin@linux.intel.com,
andrii.nakryiko@gmail.com, ast@kernel.org, bpf@vger.kernel.org,
joel@joelfernandes.org, linux-kernel@vger.kernel.org,
mark.rutland@arm.com, mhiramat@kernel.org, mingo@redhat.com,
mjeanson@efficios.com, namhyung@kernel.org, paulmck@kernel.org,
peterz@infradead.org,
syzbot+b390c8062d8387b6272a@syzkaller.appspotmail.com,
yhs@fb.com
Subject: Re: [RFC PATCH] tracing: Fix syscall tracepoint use-after-free
Date: Wed, 23 Oct 2024 20:40:01 -0400 [thread overview]
Message-ID: <20241023204001.69aa5573@rorschach.local.home> (raw)
In-Reply-To: <f63cc172-72a7-4666-a15f-c53d8562d7d7@efficios.com>
On Wed, 23 Oct 2024 11:13:53 -0400
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote:
> That question is relevant for ftrace and perf too: are there data
> structures that are reclaimed with call_rcu() after being unregistered
> from syscall tracepoints ?
ftrace doesn't assume RCU for when to synchronize with tracepoints
being unregistered. It uses:
tracepoint_synchronize_unregister()
-- Steve
next prev parent reply other threads:[~2024-10-24 0:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-22 15:18 [RFC PATCH] tracing: Fix syscall tracepoint use-after-free Mathieu Desnoyers
2024-10-22 16:14 ` Jordan Rife
2024-10-22 17:54 ` Mathieu Desnoyers
2024-10-22 19:53 ` Andrii Nakryiko
2024-10-22 20:04 ` Mathieu Desnoyers
2024-10-23 0:20 ` Steven Rostedt
2024-10-23 1:11 ` Mathieu Desnoyers
2024-10-23 1:24 ` Jordan Rife
2024-10-23 14:56 ` Jordan Rife
2024-10-23 15:13 ` Mathieu Desnoyers
2024-10-24 0:40 ` Steven Rostedt [this message]
2024-10-23 15:14 ` Alexei Starovoitov
2024-10-23 15:19 ` Mathieu Desnoyers
2024-10-24 1:28 ` Alexei Starovoitov
2024-10-24 2:05 ` Steven Rostedt
2024-10-24 17:12 ` Jordan Rife
2024-10-24 17:12 ` Andrii Nakryiko
2024-10-24 17:50 ` Jordan Rife
2024-10-24 18:18 ` Mathieu Desnoyers
2024-10-25 15:01 ` Jordan Rife
2024-10-25 20:19 ` Andrii Nakryiko
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