From nobody Wed Dec 17 23:40:25 2025 Received: from mail.ispras.ru (mail.ispras.ru [83.149.199.84]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DF0515E21D for ; Thu, 2 May 2024 16:29:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=83.149.199.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714667343; cv=none; b=EyP23NT00Swu5MTpXnw7ulZwc/1lrjULxox7CLGRYFILVB17L3GiGoLtJIpa93KTtOa7acrP7kEwMzjhkz+MIbOJbzHIkBAW/KB7iPzM9e7SGg9QkQNzp5mqXkXlaBkYIcYP9rcOVMIWlpI+M46I+W7UtCADQ7HXgr6OrHd+SPo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714667343; c=relaxed/simple; bh=BGWSwT9yiF+j7TOtTdcFLHTYs8xxX0tEDdj13yc+gxQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HxvCgy2gHaeB+4s+EBOku1UNb/1xG2Vkbb/bmnDNr0gKQz0j670Ak+YHqZntjHTn8JKzhaRhP1eQgCSq1lawakyLvzFJ3F+6K8gi2uM4HuFBgbkYys7lZTE19ytwDtKtfIWwlfa+6qUK5H93NJGq7+Xt5Ux1OFJSq9BjuVABbck= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ispras.ru; spf=pass smtp.mailfrom=ispras.ru; dkim=pass (1024-bit key) header.d=ispras.ru header.i=@ispras.ru header.b=I6UL21IF; arc=none smtp.client-ip=83.149.199.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ispras.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ispras.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ispras.ru header.i=@ispras.ru header.b="I6UL21IF" Received: from fedor-21d0.intra.ispras.ru (unknown [10.10.165.8]) by mail.ispras.ru (Postfix) with ESMTPSA id D0F7A4078513; Thu, 2 May 2024 16:18:50 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.ispras.ru D0F7A4078513 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ispras.ru; s=default; t=1714666731; bh=P260cdiv+ihyWABy6txYbc6wGpl+ovNNv3lvJc3fgaU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I6UL21IFhgt4k6VRfCylGP7XwUFuvSQDfKIeNxEN/w85gytbDkFB5R1kJoZHiyxkb J6A4MpYU8ClKz6CLjcMxxPf0m3S7GqTpBkRQ5xOANg9iNygKXADiYjrkJAIdiwu6N+ /Kk74v7OJk1431rlvWwU5zcVKWGbJ1SMZJpMiLFA= From: Fedor Pchelkin To: Xiang Chen Cc: Fedor Pchelkin , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Barry Song , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Alexey Khoroshilov , lvc-project@linuxtesting.org Subject: [PATCH 1/2] dma-mapping: benchmark: fix up kthread creation error handling Date: Thu, 2 May 2024 19:18:25 +0300 Message-ID: <20240502161827.403338-2-pchelkin@ispras.ru> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240502161827.403338-1-pchelkin@ispras.ru> References: <20240502161827.403338-1-pchelkin@ispras.ru> 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" If a kthread creation fails for some reason then uninitialized members of the tasks array will be accessed on the error path since it is allocated by kmalloc_array(). Limit the bound in such case. Found by Linux Verification Center (linuxtesting.org). Fixes: 65789daa8087 ("dma-mapping: add benchmark support for streaming DMA = APIs") Signed-off-by: Fedor Pchelkin Reviewed-by: Barry Song --- kernel/dma/map_benchmark.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/dma/map_benchmark.c b/kernel/dma/map_benchmark.c index 02205ab53b7e..ea938bc6c7e3 100644 --- a/kernel/dma/map_benchmark.c +++ b/kernel/dma/map_benchmark.c @@ -118,6 +118,7 @@ static int do_map_benchmark(struct map_benchmark_data *= map) if (IS_ERR(tsk[i])) { pr_err("create dma_map thread failed\n"); ret =3D PTR_ERR(tsk[i]); + threads =3D i; goto out; } =20 --=20 2.45.0