From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-170.mta1.migadu.com (out-170.mta1.migadu.com [95.215.58.170]) (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 4E27830BB95 for ; Wed, 18 Feb 2026 23:55:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771458914; cv=none; b=PpmXAZo5+z4A156kxL4vjsgOE1bW2RzBwZ0TYBh78G7ri/5N/aiaf2YoPZziW4VYCsO+Ym8ewb6FZVnatH/lni79CiH7Ncqt9RvO/nXIHW97azvOMcmlHSjMSzbg828imWkPwvHs3aDXV60/CBEluEMN28yWpmDN65vqWvNP4r0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771458914; c=relaxed/simple; bh=6TpKHz00MMjPwn4xpZRSdBIRp9qa0znm1xTJFWVNwN4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ZYQ3y2r/3g3pjLBHtRgJEp3RvVxtNGOZo8SK2sPl4NAT8ECZlgseom1GVtBziEQzQkRdEB1yVato9nrqc/MAvKEu9/l2qxiGQBppgjXnoNPB7i+gieBz8nsMCik6xHlPNHUYhUgkKO9MMLMRAR8pi39pGhp6OLhav2csYH88Vr8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=MGlG8QMy; arc=none smtp.client-ip=95.215.58.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="MGlG8QMy" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1771458901; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=TuixTbq+UbZmc2icBS3qUNjXj1Lf1+Ib3BW6X2nshk8=; b=MGlG8QMyM4+g+2aDC+DjxoSxCS2QkPvffqW1/+1fNNpkFHq6ibEzZMBNb7lEk3WueITGbn iNmL+qbBQRj6LHqy9/K2jLVD0314CTNyArfTf7T/SklueOC7X4xfbKlJpHbWTcCatnzhjI VT/qZ+uqtqBQ8FGRHpoktKWxuiYdalY= From: Thorsten Blum To: Herbert Xu , "David S. Miller" , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , Linus Walleij , Ard Biesheuvel Cc: Thorsten Blum , stable@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] crypto: atmel-sha204a - Fix OOM ->tfm_count leak Date: Thu, 19 Feb 2026 00:54:00 +0100 Message-ID: <20260218235358.973341-3-thorsten.blum@linux.dev> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT 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 --- 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 2081a4d538d0..63633d2b8763 100644 --- a/drivers/crypto/atmel-sha204a.c +++ b/drivers/crypto/atmel-sha204a.c @@ -53,9 +53,10 @@ 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; -- Thorsten Blum GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4