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From: Andrea Righi <arighi@nvidia.com>
To: Tejun Heo <tj@kernel.org>
Cc: David Vernet <void@manifault.com>,
	Changwoo Min <changwoo@igalia.com>,
	Emil Tsalapatis <emil@etsalapatis.com>,
	sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 sched_ext/for-7.1-fixes] sched_ext: Fix ops->priv clobber on concurrent attach/detach
Date: Mon, 11 May 2026 09:52:13 +0200	[thread overview]
Message-ID: <agGKravM1oHxiA-V@gpd4> (raw)
In-Reply-To: <0dd41fa159da749a1e3ea88cfdbcca17@kernel.org>

On Sun, May 10, 2026 at 09:47:52PM -1000, Tejun Heo wrote:
> Hello, Andrea.
> 
> Applied to sched_ext/for-7.1-fixes.
> 
> One followup if you have cycles: scx_alloc_and_add_sched() can still
> fail after rcu_assign_pointer(ops->priv, sch) (sub-sched
> kzalloc/kstrdup and kobject paths). With the new gate, that would
> leave the kdata permanently -EBUSY. Could probably be addressed by
> clearing @ops->priv on those error paths.

Ah! Makes sense, I'll send a follow-up patch.

Thanks,
-Andrea

  reply	other threads:[~2026-05-11  7:52 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-11  6:18 [PATCH v2 sched_ext/for-7.1-fixes] sched_ext: Fix ops->priv clobber on concurrent attach/detach Andrea Righi
2026-05-11  7:47 ` Tejun Heo
2026-05-11  7:52   ` Andrea Righi [this message]
2026-05-12  0:21 ` sashiko-bot

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