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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kJV2BjhM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7AEF21F0089B; Mon, 12 Oct 2026 07:00:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791788407; bh=MGy7PaJF7SUEz4M/idLMzz3p50/rc2J4LyMnYkTv8Y4=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=kJV2BjhMrXNjlXERpTtZceDD3YSOemuQPIP5phwOziaRso43zCCYPXTSDqaiLapjT xcLHqEWZ13UX0oe7DWy836j0aT9wMpM7HGHFlZZ6Kda0O+/AE7ylZixIjKD9CY9qps 49GUfGWwb8muHrz8bK5Ima3s89PCkkRaPnI+tcJh4id/8NUMqU3JTHihX/zBZL7rH5 jAuvqLC364xhtWTXTmAusdPn7nBJRGzo1Ey+JIRUjSqqUGlcSUIs73Dh/jQadb36Fq 6whSg7p2vq+o9yQ8ZykZVfo7aXbBFLBqn65A+GdU2fiDtJExbgbjXwkJytJ4UfS0Ps uZVgtPucLqpeQ== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v21 06/14] media: qcom: camss: Add Kaanapali compatible Reply-To: sashiko-reviews@lists.linux.dev To: "Hangxiang Ma" Cc: neil.armstrong@linaro.org, robh@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, olteanv@gmail.com, vkoul@kernel.org, linux-phy@lists.infradead.org, media-ci@linuxtv.org In-Reply-To: <20261011-kaanapali-camss-v21-6-04fd28d815c6@oss.qualcomm.com> References: <20261011-kaanapali-camss-v21-0-04fd28d815c6@oss.qualcomm.com> <20261011-kaanapali-camss-v21-6-04fd28d815c6@oss.qualcomm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 12 Oct 2026 07:00:05 +0000 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Thank you for your contribution! Sashiko AI review found 2 potential issue(= s) to consider: - [High] media: camss: missing DT port bounds check causes OOB array access= on csiphy - [High] media: camss: dev_pm_domain_detach() NULL pointer dereference on c= leanup -- commit 226a568dbea1991f8bda4c0b73de0c31f612545e Author: Hangxiang Ma media: qcom: camss: Add Kaanapali compatible Add CAMSS_KAANAPALI enum, Kaanapali compatible and Kaanapali CAMSS driver private data. The private data currently includes only basic information. Later changes will add CSIPHY, TPG, CSID and VFE resources. > diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/pl= atform/qcom/camss/camss.c > index c54185c93a8a9..fca3de214a922 100644 > --- a/drivers/media/platform/qcom/camss/camss.c > +++ b/drivers/media/platform/qcom/camss/camss.c [ ... ] > @@ -5576,6 +5590,13 @@ static void camss_remove(struct platform_device *p= dev) > camss_genpd_cleanup(camss); > } > =20 > +static const struct camss_resources kaanapali_resources =3D { > + .version =3D CAMSS_KAANAPALI, > + .pd_name =3D "top", > + .icc_res =3D icc_res_kaanapali, > + .icc_path_num =3D ARRAY_SIZE(icc_res_kaanapali), > +}; > + [Severity: High] Can this empty csiphy configuration lead to an out-of-bounds array access on the csiphy array? In camss_parse_endpoint_node(), the device tree port number is assigned directly to the interface ID without bounds checking against camss->res->csiphy_num: csd->interface.csiphy_id =3D vep.base.port; Since kaanapali_resources omits csiphy_num, it defaults to 0. This causes the camss->csiphy array to be dynamically allocated as a ZERO_SIZE_PTR. If a device tree specifies an endpoint (even port =3D <0>), it evaluates to= an out-of-bounds access when the async subdevice binds in camss_subdev_notifier_bound(): u8 id =3D csd->interface.csiphy_id; struct csiphy_device *csiphy =3D &camss->csiphy[id]; csiphy->cfg.csi2 =3D &csd->interface.csi2; Could this cause a regression leading to a kernel panic if the driver processes a device tree containing endpoints for this compatible? [Severity: High] Can omitting vfe_num here lead to a NULL pointer dereference during power domain cleanup? During probe failure or driver removal, camss_genpd_cleanup() handles power domain cleanup: if (camss->genpd_num =3D=3D 1) return; ... dev_pm_domain_detach(camss->genpd, true); If the driver is booted with a device tree lacking PM domains, genpd_num could be 0. This means camss_genpd_cleanup() will not exit early. If camss->genpd was never successfully attached (for example, due to having zero VFEs or no PM domains configured), it remains NULL. Because dev_pm_domain_detach() lacks a check for a NULL dev pointer before dereferencing dev->pm_domain, could this unconditional call cause a regress= ion when cleaning up? --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261011-kaanapali-= camss-v21-0-04fd28d815c6@oss.qualcomm.com?part=3D6