linux-kernel - Re: [PATCH 1/2] tracing/perf: Prevent double unregister of perf probes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <0e35ed72-d231-4294-9272-8439c249c8b5@quicinc.com>
Date: Sat, 12 Jul 2025 00:10:33 +0530
From: Aditya Chillara <quic_achillar@...cinc.com>
To: Steven Rostedt <rostedt@...dmis.org>
CC: Ingo Molnar <mingo@...hat.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] tracing/perf: Prevent double unregister of perf
 probes

On 7/9/2025 10:48 PM, Steven Rostedt wrote:
>> The exact problem was introduced by:
>> https://github.com/torvalds/linux/commit/7ef5aa081f989ecfecc1df02068a80aebbd3ec31
>> (perf/core: Simplify the perf_event_alloc() error path)
>> where __free_event was calling event->destroy() even though it would
>> have been called by perf_try_init_event in case it failed.
> Then I rather have it trigger a WARN_ON() and disable that event
> permanently until reboot. It's a bug, no need to continue using the
> event when it's in an a bad state.

Acknowledged, will update in v3.

Best Regards,
Aditya