From: Peter Zijlstra <peterz@infradead.org>
To: Christopher Lusk <christopherdlusk@gmail.com>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com
Subject: Re: [BUG] WARNING in perf_cgroup_switch: EVENT_FROZEN assertion during kthread sched-out
Date: Wed, 1 Apr 2026 18:05:45 +0200 [thread overview]
Message-ID: <20260401160545.GX2872@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <CALgo1C9=0rtX3_byvpDWS6FJDG4_-Ba2CiPKPhJ7K_EVVCg1Og@mail.gmail.com>
On Wed, Apr 01, 2026 at 10:15:56AM -0400, Christopher Lusk wrote:
> Hello,
>
> I'm hitting a WARNING in perf_cgroup_switch() on kernel 6.12.0 during
> continuous syzkaller fuzzing. The assertion WARN_ON_ONCE(ctx->is_active &
> EVENT_FROZEN) in __perf_ctx_lock() fires when the rcu_preempt kthread is
> being scheduled out.
>
> Kernel: 6.12.0 (RHEL 10 build, no out-of-tree modules)
Does this reproduce on anything recent?
next prev parent reply other threads:[~2026-04-01 16:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-01 14:15 Christopher Lusk
2026-04-01 16:05 ` Peter Zijlstra [this message]
2026-04-01 18:17 ` Christopher Lusk
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