From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C032A270552 for ; Thu, 19 Mar 2026 01:27:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773883677; cv=none; b=Nt6sO0rmTl7DP+hbA0xT5cBnLFF6pDZN2tZ6sq8B7LPQjWMueTKcam2sYSwhPepxjLx0ms1ZahZFRddmDKF76D8aCevlUND7w90eqiqDdo7E7CqGK5HtuSBTX/tX2qpFYGVn9HDMYSB2EGCKZDKXDeWTHdY0cEBpxY9l/gWxhPw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773883677; c=relaxed/simple; bh=VmTtZYYilYh86wYmGcWEhJpTKQlo66XvXC8y7qFir5Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bYZpHaIOQ9t9CrGU3nNA5ZiHHzCHVhIPyxgliCbm8ymbT632vsR5KSQJ56a3y+7j5DuJXGmzgR6HOAhlswEg1usqYOW8XkdI9VTX5l9lUi5eEKipyTSIbHz/b3QTWK9lR2t8Q6SFWaYgruAINonnkurMBGBk0mBy3jrzugXbxe0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QfiSeFBs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QfiSeFBs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E4852C19421; Thu, 19 Mar 2026 01:27:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773883677; bh=VmTtZYYilYh86wYmGcWEhJpTKQlo66XvXC8y7qFir5Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QfiSeFBsbRRuUKOIXbtygkUhikpJ5GhOrk65jAw3zPAxgkeLHqnMH89+kC5I6zA5A vKV/FTYYLVUADiT1W6NhpreMGUpap4EQuN5tI7ojBpSM4qx8DemO5R2pq53acTa2ON pH7BgOO5MEWhWwW888/spKnSp5KMqGVzwuuEaN3ZQEUuXe5hEW1633HDqVGMoVs7Bn 1SiE2VSSemHhP9VcQU0R2CJGrYXUcDiw+UqlIp0xGgBuFQPS91879ufxd8P8os9hN9 YDdA7IqlsN+PgyV+4N+ozFIthfUeAzqOduSVk6cJmq3mU7Ki0QwrD/Kn7jYp5r7IG6 8blSRQBEYesvQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Thorsten Blum , Herbert Xu , Sasha Levin Subject: [PATCH 5.15.y] crypto: atmel-sha204a - Fix OOM ->tfm_count leak Date: Wed, 18 Mar 2026 21:27:55 -0400 Message-ID: <20260319012755.1877496-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <2026031702-level-vision-656b@gregkh> References: <2026031702-level-vision-656b@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Thorsten Blum [ Upstream commit d240b079a37e90af03fd7dfec94930eb6c83936e ] If memory allocation fails, decrement ->tfm_count to avoid blocking future reads. Cc: stable@vger.kernel.org Fixes: da001fb651b0 ("crypto: atmel-i2c - add support for SHA204A random number generator") Signed-off-by: Thorsten Blum Signed-off-by: Herbert Xu [ adapted kmalloc_obj() macro to kmalloc(sizeof()) ] Signed-off-by: Sasha Levin --- drivers/crypto/atmel-sha204a.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/atmel-sha204a.c b/drivers/crypto/atmel-sha204a.c index 0ef92109ce22a..64d5ba13f4baf 100644 --- a/drivers/crypto/atmel-sha204a.c +++ b/drivers/crypto/atmel-sha204a.c @@ -52,9 +52,10 @@ static int atmel_sha204a_rng_read_nonblocking(struct hwrng *rng, void *data, rng->priv = 0; } else { work_data = kmalloc(sizeof(*work_data), GFP_ATOMIC); - if (!work_data) + if (!work_data) { + atomic_dec(&i2c_priv->tfm_count); return -ENOMEM; - + } work_data->ctx = i2c_priv; work_data->client = i2c_priv->client; -- 2.51.0