From nobody Sun Feb 8 15:42:37 2026 Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) (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 7D819194080 for ; Tue, 4 Mar 2025 07:10:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741072263; cv=none; b=pIdoBP/uuxU9UiXJQIiMBaEiM+0sAks+Du+SgkT6bbh6VH2nU25ZZqeITB+7TO7XrCaNoZzfh17t4Z1k9n2RQ6esTt0yff5V5QkJULsQgzjNlEoHE4aBE7I00ueo73umbaUO0P+hIAeE6MPANWGAv1rt80Vx1CaDX+ttuqHPgrQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741072263; c=relaxed/simple; bh=2abKyYZj3dPzLLW86axJgj4Tbg9s3rK4r9mLG2cT5lU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=J2NrLp6D4I9qtH75b3MEKqBSxqqmtjxbEwMAjFVtCWvgwU4xyBnSyFFMNwPUbYigGg9nXkcv50cFcZqyPnxO1romDWiUDeJ/ME8gvfCSuU7vDM0h4HiLz1qdcSLMdLlEwB3UQQXfZiBur4s7eys/5wrr2te0D6zo8iwNXghbyNs= 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=159.226.251.84 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 localhost.localdomain (unknown [124.16.141.245]) by APP-05 (Coremail) with SMTP id zQCowADHz8t5p8ZnAcjuEQ--.11326S2; Tue, 04 Mar 2025 15:10:51 +0800 (CST) From: Wentao Liang To: kenneth.feng@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, simona@ffwll.ch Cc: sunil.khatri@amd.com, Jun.Ma2@amd.com, lijo.lazar@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Wentao Liang Subject: [PATCH] drm/amdgpu: handle amdgpu_cgs_create_device() errors in amd_powerplay_create() Date: Tue, 4 Mar 2025 15:10:30 +0800 Message-ID: <20250304071030.2166-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.42.0.windows.2 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: zQCowADHz8t5p8ZnAcjuEQ--.11326S2 X-Coremail-Antispam: 1UD129KBjvdXoWrZr1DtFWrtr1xtr1xtFWxXrb_yoWDuwcEka 1rJr1Sqr1UKFn8AwnrArs8Zryqyr4a9rWrGr12gwnayrnrJ3srXFyjgry7uF1ruayIgF98 uF1j9F4rAF97GjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUba8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Cr 1j6rxdM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E 8cxan2IY04v7MxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFV Cjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWl x4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r 1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_ JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcS sGvfC2KfnxnUUI43ZEXa7VUb8hL5UUUUU== X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgoLA2fGdHuqjAAAsM Content-Type: text/plain; charset="utf-8" Add error handling to propagate amdgpu_cgs_create_device() failures to the caller. When amdgpu_cgs_create_device() fails, immediately return -EINVAL to stop further processing and prevent null pointer dereference. Signed-off-by: Wentao Liang --- drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c b/drivers/gpu= /drm/amd/pm/powerplay/amd_powerplay.c index 26624a716fc6..2cb05614466f 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c @@ -51,6 +51,8 @@ static int amd_powerplay_create(struct amdgpu_device *ade= v) hwmgr->adev =3D adev; hwmgr->not_vf =3D !amdgpu_sriov_vf(adev); hwmgr->device =3D amdgpu_cgs_create_device(adev); + if (!hwmgr->device) + return -EINVAL; mutex_init(&hwmgr->msg_lock); hwmgr->chip_family =3D adev->family; hwmgr->chip_id =3D adev->asic_type; --=20 2.42.0.windows.2