From patchwork Mon Feb 10 03:51:54 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ethan Carter Edwards X-Patchwork-Id: 13967201 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) (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 AA51D125B2; Mon, 10 Feb 2025 03:52:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739159532; cv=none; b=Ee9Rxq0hZDDGlklhV+5dkCplj3CdSShheIfuTAApti6tWdYQ71UpaKQkPEy14/gs0sMrDx1N9Ro+FWLaJVYYRitLD6ubVYSxxcDdVGcWJLznbMvY181b14x75Viu38kQAr8m3Xl3ggmNjUTOAEg36zedHMDOKHU8Qa4B9KFR17A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739159532; c=relaxed/simple; bh=28nhjIqmGv2HbdXYQNPlD/qwIn8nqK1Z1FnvA35GsIs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=cKqrufoUp1YbJSE+CTfwszog4JCMAIQAlnverB5Wt1fnqBu3hY/2YGHjNYeDPOF7i0/qNrOLDWN4bcldbuzqKdI9eav9L4dKNw5nZ3jE14gFrH3wcM4x977qPmPNr2Db0zGI4HS3X3y3ec6gWANKgB21deQJ07ksonK0seAwCyk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ethancedwards.com; spf=pass smtp.mailfrom=ethancedwards.com; dkim=pass (2048-bit key) header.d=ethancedwards.com header.i=@ethancedwards.com header.b=GFSvKdEk; arc=none smtp.client-ip=80.241.56.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ethancedwards.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ethancedwards.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ethancedwards.com header.i=@ethancedwards.com header.b="GFSvKdEk" Received: from smtp202.mailbox.org (smtp202.mailbox.org [IPv6:2001:67c:2050:b231:465::202]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4YrrHP2MQmz9shp; Mon, 10 Feb 2025 04:52:01 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ethancedwards.com; s=MBO0001; t=1739159521; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=NSZuHneQJ8E7PuSXeM+u1QfGVntSHexPdYDiQ+xH+8w=; b=GFSvKdEkBADv1j9CAKotDU7aEWO2kPTxKB4iGWRMssF0vGQjYfY9418/KuQ+AeGpCjOGCr Rq+9vI1EKtSlTqyzT/QSxGq7Q5ha0NocR+s1bNX7lbyP8jJGHU8qtK+sxfv1e6Q304ipxy 3X4Bs2trOamT6t51W5r6xcn7HXoI9Cm0TtVg0qIz9GRe9vyGDYMR/pYTtWGyy/bfhC79qN hhTAmi/v36hF6LC1mKFa4p74pG4ItEk/G5rrpp/79QvwGLfzwala1gdMlAvBOBTczq/K7V +45krd3MRqWJkUWESgD0B9ab/Ypurdkp6rtlYXmi+Kp6a0/16hJZWG6N6XwgrA== From: Ethan Carter Edwards Date: Sun, 09 Feb 2025 22:51:54 -0500 Subject: [PATCH v2] drm/msm/dpu: Fix uninitialized variable Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250209-dpu-v2-1-114dfd4ebefd@ethancedwards.com> X-B4-Tracking: v=1; b=H4sIANl3qWcC/1WNQQ7CIBREr9L8tRhABezKe5gu8POxLCwNVNQ03 F3szuWbzLxZIVMKlKHvVkhUQg5xaiB3HeBopzux4BqD5PLEJT8zNz8ZHrxFbTwqoaE150Q+vDf LdWg8hrzE9NmkRfzS/30RTDDubkopY45e8wst7QzJvWxyeY/xAUOt9Quk107cngAAAA== X-Change-ID: 20250209-dpu-c3fac78fc617 To: Abhinav Kumar , Rob Clark , Sean Paul , David Airlie Cc: Dmitry Baryshkov , Marijn Suijten , Simona Vetter , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-hardening@vger.kernel.org, Ethan Carter Edwards X-Developer-Signature: v=1; a=openpgp-sha256; l=1837; i=ethan@ethancedwards.com; h=from:subject:message-id; bh=28nhjIqmGv2HbdXYQNPlD/qwIn8nqK1Z1FnvA35GsIs=; b=LS0tLS1CRUdJTiBQR1AgTUVTU0FHRS0tLS0tCgpvd0o0bkp2QXk4ekFKWGJEOXFoNThlVGp6e GhQcXlVeHBLOHN2K3YwTkNySmRIZGNFODlGZzlNVHF3NW5PdTBJCkZ2YnphRGxWTHBYMmdJSGg2 ZTJPVWhZR01TNEdXVEZGbHY4NXlta1BOV2NvN1B6cjBnUXpoNVVKWkFnREY2Y0EKVE1UekNpUER vMmVtcXBrTWJENEZ0d1RZRFlxK0xIbmRiZC8xZGwvRnEvODhic2Q5MWorWXcvQS8vdEd1OWUreQ pGdkhVVmN5ODQ2b3cyMzJkNkYrVHk5OXFIUjh1VEM2VWQ4eG5CUUJSQms0Uwo9cHZzKwotLS0tL UVORCBQR1AgTUVTU0FHRS0tLS0tCg== X-Developer-Key: i=ethan@ethancedwards.com; a=openpgp; fpr=2E51F61839D1FA947A7300C234C04305D581DBFE X-Rspamd-Queue-Id: 4YrrHP2MQmz9shp There is a possibility for an uninitialized *ret* variable to be returned in some code paths. Fix this by initializing *ret* to 0. Addresses-Coverity-ID: 1642546 ("Uninitialized scalar variable") Fixes: 774bcfb731765d ("drm/msm/dpu: add support for virtual planes") Signed-off-by: Ethan Carter Edwards Reviewed-by: Dmitry Baryshkov Reviewed-by: Abhinav Kumar --- Changes in v2: - Return explicit 0 when no error occurs - Add hardening mailing lists - Link to v1: https://lore.kernel.org/r/20250209-dpu-v1-1-0db666884f70@ethancedwards.com --- drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) --- base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3 change-id: 20250209-dpu-c3fac78fc617 Best regards, diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c index 098abc2c0003cde90ce6219c97ee18fa055a92a5..af3e541f60c303eb5212524e877129359b5ca98c 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c @@ -1164,7 +1164,6 @@ int dpu_assign_plane_resources(struct dpu_global_state *global_state, unsigned int num_planes) { unsigned int i; - int ret; for (i = 0; i < num_planes; i++) { struct drm_plane_state *plane_state = states[i]; @@ -1173,13 +1172,13 @@ int dpu_assign_plane_resources(struct dpu_global_state *global_state, !plane_state->visible) continue; - ret = dpu_plane_virtual_assign_resources(crtc, global_state, + int ret = dpu_plane_virtual_assign_resources(crtc, global_state, state, plane_state); if (ret) - break; + return ret; } - return ret; + return 0; } static void dpu_plane_flush_csc(struct dpu_plane *pdpu, struct dpu_sw_pipe *pipe)