From nobody Wed Dec 17 19:54:05 2025 Received: from mail.nfschina.com (unknown [42.101.60.213]) by smtp.subspace.kernel.org (Postfix) with SMTP id 3C19C148FF2; Mon, 16 Dec 2024 13:04:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=42.101.60.213 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734354282; cv=none; b=XR34Tr+BkjCbY3DEUZyUbUPZZjl/wUTCOcOmK3JNcgvIV2ZCW3Acd2ETMfAx4mqBn1PAzNnPOVkjbAzqYfbm++edCdDAnyXrZvTJNPAxwSp2BhectXJ0WqOHGcCOyLFJsAcy+fGDnLj8208uzbKqd/A38lWK+6JvZjLefsRCY3s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734354282; c=relaxed/simple; bh=vqxXOFHRl25qENardnOS297fxLEdufccVSUcODPUPks=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:MIME-Version; b=H4tRQM7z5vOd8x7EcZq/VYmfRvTAAXvEJjvK7IUwtaQKjfBfkBPGOyQeylOWBbfT25LRoWG2DxUvJLKAGHCtELj29AYhxcPI1g/4HL7BLAxr2sVB7T/63FrWr6tJvMyKulFf+Y68HZnc/AGqesXC6YeuiAjtTveMT+oyHnSqiG4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=nfschina.com; spf=pass smtp.mailfrom=nfschina.com; arc=none smtp.client-ip=42.101.60.213 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=nfschina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nfschina.com Received: from localhost.localdomain (unknown [103.163.180.3]) by mail.nfschina.com (MailData Gateway V2.8.8) with ESMTPSA id 635BE602A5E7F; Mon, 16 Dec 2024 21:04:26 +0800 (CST) X-MD-Sfrom: zhanxin@nfschina.com X-MD-SrcIP: 103.163.180.3 From: Zhanxin Qi To: kherbst@redhat.com, lyude@redhat.com, dakr@redhat.com, airlied@gmail.com, simona@ffwll.ch Cc: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Zhanxin Qi , Duanjun Li Subject: [PATCH v1 v1] drm/nouveau: Fix memory leak in nvbios_iccsense_parse Date: Mon, 16 Dec 2024 21:03:03 +0800 Message-Id: <20241216130303.246223-1-zhanxin@nfschina.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: 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 Content-Type: text/plain; charset="utf-8" The nvbios_iccsense_parse function allocates memory for sensor data but fails to free it when the function exits, leading to a memory leak. Add proper cleanup to free the allocated memory. Fixes: 39b7e6e547ff ("drm/nouveau/nvbios/iccsense: add parsing of the SENSE= table") Cc: stable@vger.kernel.org Signed-off-by: Zhanxin Qi Signed-off-by: Duanjun Li Signed-off-by: Danilo Krummrich --- .../include/nvkm/subdev/bios/iccsense.h | 2 ++ .../drm/nouveau/nvkm/subdev/bios/iccsense.c | 20 +++++++++++++++++++ .../drm/nouveau/nvkm/subdev/iccsense/base.c | 3 +++ 3 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/iccsense.h b/= drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/iccsense.h index 4c108fd2c805..8bfc28c3f7a7 100644 --- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/iccsense.h +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/iccsense.h @@ -20,4 +20,6 @@ struct nvbios_iccsense { }; =20 int nvbios_iccsense_parse(struct nvkm_bios *, struct nvbios_iccsense *); + +void nvbios_iccsense_cleanup(struct nvbios_iccsense *iccsense); #endif diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c b/drivers/= gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c index dea444d48f94..38fcc91ffea6 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c @@ -56,6 +56,19 @@ nvbios_iccsense_table(struct nvkm_bios *bios, u8 *ver, u= 8 *hdr, u8 *cnt, return 0; } =20 +/** + * nvbios_iccsense_parse - Parse ICCSENSE table from VBIOS + * @bios: VBIOS base pointer + * @iccsense: ICCSENSE table structure to fill + * + * Parses the ICCSENSE table from VBIOS and fills the provided structure. + * The caller must invoke nvbios_iccsense_cleanup() after successful parsi= ng + * to free the allocated rail resources. + * + * Returns: + * 0 - Success + * -ENODEV - Table not found + */ int nvbios_iccsense_parse(struct nvkm_bios *bios, struct nvbios_iccsense *iccs= ense) { @@ -127,3 +140,10 @@ nvbios_iccsense_parse(struct nvkm_bios *bios, struct n= vbios_iccsense *iccsense) =20 return 0; } + +void +nvbios_iccsense_cleanup(struct nvbios_iccsense *iccsense) +{ + kfree(iccsense->rail); + iccsense->rail =3D NULL; +} diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c b/drivers/= gpu/drm/nouveau/nvkm/subdev/iccsense/base.c index 8f0ccd3664eb..4c1759ecce38 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c @@ -291,6 +291,9 @@ nvkm_iccsense_oneinit(struct nvkm_subdev *subdev) list_add_tail(&rail->head, &iccsense->rails); } } + + nvbios_iccsense_cleanup(&stbl); + return 0; } =20 --=20 2.30.2