From nobody Fri Sep 25 05:29:51 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C07724AF17D; Wed, 16 Sep 2026 09:58:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789552738; cv=none; b=tRqPXQgVX7lMNanS6NmKzDO4FFvR5FZ2vHAKdFuQFPapP03foszRvTbqNFZuOkF9rmPEq1BcvG3o/65woHJhttA16Spzs0TaGqgfUQXU7cfeAiIxXg1CTsD5z4lSLJ1e2ze/lRsvrBczlLVLnhVTHlaAxcQjgyG0be14CGWdMV8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789552738; c=relaxed/simple; bh=q1Ggv5xO6t3FDyZggZHheXutMsgqWu8zdxmPa0BfnhY=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Q0I7jxFQgfhj2h443LwXJmynmtRQs2koYBSRt5Ztucrfs4vZs9IAWccARfo2zd0mcMZubeJuaWMJ44FFP+34td8m/ER+59J3zE7UiJGkE7/QmbdpzBfLKOu3BG4YO5sZQv4+Pi2nDkZ4BtSpa+uG+bfwZjNP9aIzhD198d7V74o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-03 (Coremail) with SMTP id rQCowABXXDpJaKpqJMXgBw--.37267S2; Wed, 16 Sep 2026 17:58:33 +0800 (CST) From: Wentao Liang To: Dennis.Li@amd.com Cc: airlied@gmail.com, alexander.deucher@amd.com, amd-gfx@lists.freedesktop.org, christian.koenig@amd.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, monk.liu@amd.com, simona@ffwll.ch, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] drm/amdgpu: Fix runtime PM leak in amdgpu_debugfs_test_ib_show() Date: Wed, 16 Sep 2026 09:58:05 +0000 Message-Id: <20260916095805.2011304-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: rQCowABXXDpJaKpqJMXgBw--.37267S2 X-Coremail-Antispam: 1UD129KBjvJXoW7uFW5JFWDtFW5uFW5Gry8Zrb_yoW8GFy7p3 9Yg3WYvr1DZF17t34DAa18XFyru3yaqryxGrykuw1Uu3Z8JF1rJF15JrWjgry8GrZ7CwsI vrZ7KrW3ZF1qyFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9a14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jw0_WrylYx0Ex4A2jsIE14v26r4UJVWxJr1lOx8S6xCaFVCjc4AY6r 1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02 628vn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4 IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1r MI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCV W8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWU JVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJr UvcSsGvfC2KfnxnUUI43ZEXa7VUbtl1PUUUUU== X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBggMA2qqPpSseAAAs- Content-Type: text/plain; charset="utf-8" amdgpu_debugfs_test_ib_show() resumes the device with pm_runtime_get_sync() before taking the reset domain semaphore with down_write_killable(). If the write lock acquisition is interrupted, the function returns without calling pm_runtime_put_autosuspend(), leaking the runtime PM reference acquired for the device and keeping the GPU awake. Drop the runtime PM reference on the interrupted down_write_killable() error path before returning. Fixes: 6049db43d6dd ("drm/amdgpu: change reset lock from mutex to rw_semaph= ore") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/= amd/amdgpu/amdgpu_debugfs.c index 092fd3309099..adc0252f6400 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1764,8 +1764,10 @@ static int amdgpu_debugfs_test_ib_show(struct seq_fi= le *m, void *unused) =20 /* Avoid accidently unparking the sched thread during GPU reset */ r =3D down_write_killable(&adev->reset_domain->sem); - if (r) + if (r) { + pm_runtime_put_autosuspend(dev->dev); return r; + } =20 /* hold on the scheduler */ for (i =3D 0; i < AMDGPU_MAX_RINGS; i++) { --=20 2.34.1