From nobody Fri Sep 25 04:08:59 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 865884C33E0; Wed, 16 Sep 2026 18:26:24 +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=1789583191; cv=none; b=KBs9Sz+gKOVStyTyVeHFWWtUEjyPtTwRS8EDovL4VtSDi/iLrhSg/ZrSKbrqnSrJxNe80UM0/ZJD9T2pjqxN96gPblkt4mc4fPMKp/dqMUgPuxQNAp6nBHepCwE3RqPk+uBIEc6TUr0BYxWy9p9T90+BY0WjMS/K1Z/jjU3cRrI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789583191; c=relaxed/simple; bh=02pmzJfioY5sM9RU8KqEw/pGb/Mp5V59fFHCtJ+Ck5s=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XuLt1bY7heu3nOW/Bc8G2Px9cng2SHmueuicsEFYxpn2aG6aYuAlh1HHDHfFlTIBL1BmTC7v+pnCbETl2plZWbMu/EppT5zalvSZoepmJKuLvt+hW856hceTm1LRvlEMtvfJl4nSazYml9vQKgC2p+WTE4U+vZERcjFNpTM6qo0= 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 zQCowADnVD9K36pqEH1vCA--.24263S2; Thu, 17 Sep 2026 02:26:18 +0800 (CST) From: Wentao Liang To: airlied@gmail.com Cc: dri-devel@lists.freedesktop.org, jonathanh@nvidia.com, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, mperttunen@nvidia.com, simona@ffwll.ch, thierry.reding@kernel.org, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] drm/tegra: Fix bo reference leak in host1x_reloc_copy_from_user() Date: Wed, 16 Sep 2026 18:25:50 +0000 Message-Id: <20260916182550.2091797-1-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: zQCowADnVD9K36pqEH1vCA--.24263S2 X-Coremail-Antispam: 1UD129KBjvdXoWrKr47tFyDWrWkAr1DKw4xtFb_yoWDGrb_WF 1UWFn7W34DuF4qy3WUAr47ZryIyFn5uF48Xa12yayfK34UZFyjq3429ryDur17Ca1xAF1D A347X34SvF4SgjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb-8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26F 4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv 7VC0I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Cr0_Gr1UMcvjeVCFs4IE7xkEbV WUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7Cj xVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4I kC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWU WwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JF I_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwCI42IY6xAIw20EY4v20xvaj40_ Jr0_JF4lIxAIcVC2z280aVAFwI0_Cr0_Gr1UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Cr1j6r xdYxBIdaVFxhVjvjDU0xZFpf9x0JUtgA7UUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBwUMA2qqpVh7CwAAsA Content-Type: text/plain; charset="utf-8" If the lookup of the relocation target fails after the command buffer object has been looked up, the reference taken for the latter is not recorded in the caller's refs[] array and is never released. Drop it before returning. Fixes: 961e3beae3b2 ("drm/tegra: Make job submission 64-bit safe") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/gpu/drm/tegra/drm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 1dcef4e7d104..4e4d41c527c6 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -159,8 +159,10 @@ static int host1x_reloc_copy_from_user(struct host1x_r= eloc *dest, return -ENOENT; =20 dest->target.bo =3D tegra_gem_lookup(file, target); - if (!dest->target.bo) + if (!dest->target.bo) { + drm_gem_object_put(dest->cmdbuf.bo); return -ENOENT; + } =20 return 0; } --=20 2.34.1