From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 B8E5A3CC324; Tue, 16 Jun 2026 18:10:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633434; cv=none; b=hxo9d55dVbcu7poR3sUpOmTRBzWUt95ZFK+L0mfwoftn8w32tHAYCHB1y3y3nWzLR6Z62jYupmS3XLY1Rjy8hJEGUuI/zfWSHuZBDIRQn/XsH8EQAzPvUvhxZvV+MYC740w0tzodVFcMeXlg6b73Ec9hccWKs81ZoOI0FmGpvvM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633434; c=relaxed/simple; bh=BOstoCXPutIcpFs391ysMK/VULgzFp836Tl0D2/Esgs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=dsVxmg5NQT9AlNKKNefJ/sEhNmWRjM8HYx9tqszY1MoZG2lnYA4QGxJbz/k/1RQlKaKQwldwe4XtwunEd4ZRWZImPPzfWZ9VUHKBZ8T8zkkSneYZm7mxW/DidZ+yAHiKFFyxAZJ+62s5E4kbfIo7Kraqk1eZ2r7gMGqO+abuph0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nkEOtOin; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="nkEOtOin" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC4D41F000E9; Tue, 16 Jun 2026 18:10:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781633433; bh=UrHoa9BV8/D/k54hmN2WMBPaXGpJQx56qLK20ddI0gE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nkEOtOinNtnTyWEiG2BVvZomSbK9EYcgLcD0cYPR8Fvq26UIrX08HzNHfKMIvgimR w3tkZHcGpGRK7ouLbEU9lrmCeniplIJKACk3/5tJUT0Hee9yKGaC980rqOMrxn31lS WgngkA2BHUH+mJ8ExlMesq5jhEVi6b0/Hh/wv75Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, sashiko , Felix Gu , Andy Shevchenko , =?UTF-8?q?Nuno=20S=C3=A1?= , Maxwell Doose , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 5.15 078/411] iio: buffer: hw-consumer: fix use-after-free in error path Date: Tue, 16 Jun 2026 20:25:16 +0530 Message-ID: <20260616145104.419620567@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felix Gu commit 6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4 upstream. In the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code was using list_for_each_entry() to iterate through buffers while calling iio_buffer_put() which can free the current buffer if refcount drops to 0. The list_for_each_entry() loop macro then evaluates buf->head.next to continue iteration, accessing the freed buffer. Fix this by using list_for_each_entry_safe(). Fixes: 48b66f8f936f ("iio: Add hardware consumer buffer support") Reported-by: sashiko Closes: https://sashiko.dev/#/patchset/20260427-iio_buf-v1-1-2bbdac844647%40gmail.com Signed-off-by: Felix Gu Reviewed-by: Andy Shevchenko Reviewed-by: Nuno Sá Reviewed-by: Maxwell Doose Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/buffer/industrialio-hw-consumer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/iio/buffer/industrialio-hw-consumer.c +++ b/drivers/iio/buffer/industrialio-hw-consumer.c @@ -82,7 +82,7 @@ static struct hw_consumer_buffer *iio_hw */ struct iio_hw_consumer *iio_hw_consumer_alloc(struct device *dev) { - struct hw_consumer_buffer *buf; + struct hw_consumer_buffer *buf, *tmp; struct iio_hw_consumer *hwc; struct iio_channel *chan; int ret; @@ -113,7 +113,7 @@ struct iio_hw_consumer *iio_hw_consumer_ return hwc; err_put_buffers: - list_for_each_entry(buf, &hwc->buffers, head) + list_for_each_entry_safe(buf, tmp, &hwc->buffers, head) iio_buffer_put(&buf->buffer); iio_channel_release_all(hwc->channels); err_free_hwc: