From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7A6D42EAD10; Thu, 3 Jul 2025 15:15:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751555752; cv=none; b=eXzi7cyTNWfriB0jGln/IPXjeRyHxQMcZwMdKesXbWk1UOO7rSE3olxmQ4rrPzeeDZWUszNJXVQY950WpphSvUnYV3f2mlfyd5n3sc5qak8joTQXVXQSygHn8E2FkXvMQxpjBrRrqFAdtbLywZ59MsipfF6TtdAOYgd0Ix2XGAA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751555752; c=relaxed/simple; bh=r6aQjR2DUNkO9gPIQZStTPUgNdtOED9ukbME4MWgafA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=W8xhWjZ25M/jSB+KXBZOY/4pYaWVjiah4rGhCah1Z0FP2MGGolnXSKL7zGeWYBnDrlyl4BuT/lMkWj7Wr4EVgMSaVKE4W23A4cDFOWqdfoMwGx92awUgncj5RpuWpq9pHZhrh6pxMJt+SSSEFdZUexXwbwY7jG8DoQy2BbVam34= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QElYUMjm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QElYUMjm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 841F1C4CEE3; Thu, 3 Jul 2025 15:15:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751555752; bh=r6aQjR2DUNkO9gPIQZStTPUgNdtOED9ukbME4MWgafA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QElYUMjmvoX/gfNYHLiyrtVBSP/lQXhlPgtsH8zMiyTzhVsQStkXZ+tmnsOgKR5Qt 8N43BMli1K1GeUs1n1g0f85KqvA7ozkJWnQlCCpsJwYT1pVa0uTlAvLmE9wc13r10E euRbBPYCLSdT1bmeC1/0qfn3CoGzP7/rWQvKN614= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Philipp Stanner , Lucas Stach , =?UTF-8?q?Ma=C3=ADra=20Canal?= Subject: [PATCH 6.6 111/139] drm/etnaviv: Protect the schedulers pending list with its lock Date: Thu, 3 Jul 2025 16:42:54 +0200 Message-ID: <20250703143945.519217658@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250703143941.182414597@linuxfoundation.org> References: <20250703143941.182414597@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Maíra Canal commit 61ee19dedb8d753249e20308782bf4e9e2fb7344 upstream. Commit 704d3d60fec4 ("drm/etnaviv: don't block scheduler when GPU is still active") ensured that active jobs are returned to the pending list when extending the timeout. However, it didn't use the pending list's lock to manipulate the list, which causes a race condition as the scheduler's workqueues are running. Hold the lock while manipulating the scheduler's pending list to prevent a race. Cc: stable@vger.kernel.org Fixes: 704d3d60fec4 ("drm/etnaviv: don't block scheduler when GPU is still active") Reported-by: Philipp Stanner Closes: https://lore.kernel.org/dri-devel/964e59ba1539083ef29b06d3c78f5e2e9b138ab8.camel@mailbox.org/ Reviewed-by: Lucas Stach Reviewed-by: Philipp Stanner Link: https://lore.kernel.org/r/20250602132240.93314-1-mcanal@igalia.com Signed-off-by: Maíra Canal Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/etnaviv/etnaviv_sched.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c @@ -34,6 +34,7 @@ static enum drm_gpu_sched_stat etnaviv_s *sched_job) { struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job); + struct drm_gpu_scheduler *sched = sched_job->sched; struct etnaviv_gpu *gpu = submit->gpu; u32 dma_addr; int change; @@ -76,7 +77,9 @@ static enum drm_gpu_sched_stat etnaviv_s return DRM_GPU_SCHED_STAT_NOMINAL; out_no_timeout: - list_add(&sched_job->list, &sched_job->sched->pending_list); + spin_lock(&sched->job_list_lock); + list_add(&sched_job->list, &sched->pending_list); + spin_unlock(&sched->job_list_lock); return DRM_GPU_SCHED_STAT_NOMINAL; }