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 648222B9B7 for ; Thu, 19 Mar 2026 00:41:22 +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=1773880882; cv=none; b=NZjwX+rzmCVku2iwBJ3w9JLwWwyIqNKmo1Z/mpHVCcoqU5in3rXFpPjOubdOii+iSH/MV/EvB5i7Ki1wzmFFKss6j63JEYJgWozXbOQp8mNjufH4ohUxo1ZGPn0PHTKdMBVPckNzFjgVmv5uCr09ELHR+1QZ92Kndx99o0wrORg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773880882; c=relaxed/simple; bh=sh527Hpyi/jRiM4Hl696Zk2bJQ3wV+8CfRmSgxHZr2Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sJT7dUmHv+jtxL0EIPUyCIHScYFH9f2Y59bxVghUHQvRfJa29sePvj6HTONV6QjuzDo8iWcLqmLyyAjDZe04go7OFDWmFqyJ6HFLt0p5ISPJzlzvscgsiqnEpTMQRxhMX/njnerzB8P16kcsoXb7vaUY44sPoW9Gqak/LsPnL0Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oGtfMuw2; 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="oGtfMuw2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7208DC19421; Thu, 19 Mar 2026 00:41:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773880882; bh=sh527Hpyi/jRiM4Hl696Zk2bJQ3wV+8CfRmSgxHZr2Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oGtfMuw2p81x4ffCotGzN4zVpqlrnhI7SA1sa7ZsjNebYSRUNE3YMvo+JXZzi/IST +N8PcmcUIbVrt13YorPF8FGGxEdlgewF9wJDxzXDxUobN42NZ9+j2zA2CQps3LMREI 2l+rGjStAW1vRGojHnEOr9po7IOvde1Drj7P58bWzKrOkK8qNgY/5T+H+mR17Nib04 NspKypuffoLNQ9GN6T/k0LoLCE3Ilmc4DbvmojpEPkBT3MTAaR7ftVQB1HLtzp/fVb SUXEEMWD/Zp1s25MO2FC1xn7coK0aSHZ+d0dmtDFDvB6hhHYBBWDZSE6SHAmnO2wbn Kfp0ThHF/z1IA== From: Sasha Levin To: stable@vger.kernel.org Cc: Thorsten Blum , Herbert Xu , Sasha Levin Subject: [PATCH 6.18.y] crypto: atmel-sha204a - Fix OOM ->tfm_count leak Date: Wed, 18 Mar 2026 20:41:19 -0400 Message-ID: <20260319004119.1852584-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <2026031700-bootie-guts-d510@gregkh> References: <2026031700-bootie-guts-d510@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 0fcf4a39de279..a12653a658699 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