From nobody Fri Sep 25 02:09:39 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (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 200764F799F; Thu, 17 Sep 2026 14:25:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789655140; cv=none; b=OMY4b2ywdB+cQeH5mmE8p/ebAm35/mttTvIKMHCxfvA7/6fOlZs9yJ78kL8aoeXwgw6h1VSy0ZJyXoDMuGnaojK42GjzIBQGqyvnyeoAmugnA6pyAaHxPfZ0/uFKzLNYxmihx+zLjoGbSrmwvsAC5EO/iHV93jD0wDwG5Y1qvQc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789655140; c=relaxed/simple; bh=0dMub+a3axmD2mf8X4K4kavErvLdqT8YJfzyOvI3VaQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=QvsaRgZsBkX+5qsI+qmP1YXG8X9CIxqmefzEbg1nkPiviN2cFzn2t7xq0jT3W7HVRe0TofyC+HE4zSabaCBrAAbAHyHR+X54vu//WMtFxEKTAC+EgskFpaKsClKqK7RC87IjKJ9JpFM9szML/9gnvZPyAamwcbpnriqBiM4Bmg8= 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=159.226.251.25 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-05 (Coremail) with SMTP id zQCowAAnlT9f+Ktqn2iCCA--.4870S2; Thu, 17 Sep 2026 22:25:35 +0800 (CST) From: Wentao Liang To: broonie@kernel.org Cc: digetx@gmail.com, lgirdwood@gmail.com, linux-kernel@vger.kernel.org, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] regulator: core: Fix c_rdev reference leak in regulator_resolve_coupling() Date: Thu, 17 Sep 2026 14:25:35 +0000 Message-Id: <20260917142535.2156720-1-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: zQCowAAnlT9f+Ktqn2iCCA--.4870S2 X-Coremail-Antispam: 1UD129KBjvdXoW7GF1DWrWxtF4xXr48tF4UXFb_yoWDJFc_Gr n8Aa4xuws7Zw4kCr1IqF1qvr9xZr1q9a93u3y8KFW3CFWUAFyUC3sxJry3Cr4UJw4UXr9r Zr17GF48Zw13ujkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbfkYjsxI4VWDJwAYFVCjjxCrM7CY07I20VC2zVCF04k26cxKx2IY s7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4 kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_ Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26r xl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1q6rW5McIj6I8E87Iv67AKxVWxJr0_GcWlOx8S6xCaFVCjc4AY6r 1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq62Iq12xI8VA0II8E6IAqYI8I648v4I1lc7Cj xVAaw2AFwI0_JF0_Jw1l42xK82IYc2Ij64vIr41l42xK82IY6x8ErcxFaVAv8VW8GFyrJr 1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4UJVWxJr1lIxAIcVC2z280aVCY1x 0267AKxVW0oVCq3bIYCTnIWIevJa73UjIFyTuYvjxUw9NVDUUUU X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAINA2qr9nAE2gAAsZ Content-Type: text/plain; charset="utf-8" of_parse_coupled_regulator() returns the coupled regulator with its device reference incremented, but regulator_resolve_coupling() returns without dropping it when the coupled regulator belongs to a different coupler, leaking the reference. Fixes: d8ca7d184b33 ("regulator: core: Introduce API for regulators couplin= g customization") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/regulator/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index dc5d67767336..0ae11a521943 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -5843,6 +5843,7 @@ static void regulator_resolve_coupling(struct regulat= or_dev *rdev) if (c_rdev->coupling_desc.coupler !=3D coupler) { rdev_err(rdev, "coupler mismatch with %s\n", rdev_get_name(c_rdev)); + put_device(&c_rdev->dev); return; } =20 --=20 2.34.1