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 905992C08D0; Sat, 12 Sep 2026 18:59:43 +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=1789239584; cv=none; b=nYEqrE+d0XXpWeZAYBxK72C1Se8P1kB+DxIMntSmMHgeOy3G8hVDeCOY4Yh4NZcgfh+kSib95Q2eR2XjNv4wv9HF+dy6+ICUL/FlkCsy67zbtQa7tE3aRSCOqnChK9xbgDKU6AatK0PLG6gt8+xD8eU0YYUaBc1vuIEdpCGEO7U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789239584; c=relaxed/simple; bh=EMaQ6oJbysEVz0MDpRJM5D366OG80KQWV0G7aCqromE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LH/xxxqSYrz+EX7yizkE4eXhnn+L7ZGfG5LrSJs6Qw4jitUFSeCG7YrXbbrZYjgKOUl4ZZF3noVorZoAXND1myVoufXYW49kpW5h4C0lIbeJOX1xz9vFSZyN3K9WhVzVZ4FNCMo0MPGXhis6nXwaZDxP8Kl8it3umgJZVl89qDc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=w5oITELL; 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="w5oITELL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E72B1F000FF; Sat, 12 Sep 2026 18:59:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789239583; bh=5dc2paXUF5kBb3va/PS3ReUcCaMeqoDNiVeTTtuANkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=w5oITELLhwb8AlLY01w4J1ftl5TwAOkPEHhzUOUcO5ehVZUVQTJTZR853jP1fgdzA yfS0gL/JQBb0AOb3g1iJHTZEdKE2yw28KQ3vS3AhHYmHsTIEl+RiPJAIvvcoCpNGOy S5gXuoeqpHSmEjYfBkR3eHETH9IV+KEEoYltiB0Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Guangshuo Li , Alexandre Bounine , Matt Porter , Yang yingliang , Andrew Morton , Sasha Levin Subject: [PATCH 5.15 694/935] rapidio: clear mport->net when rio_add_net() fails Date: Sat, 12 Sep 2026 09:02:04 +0200 Message-ID: <20260912065542.757857628@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guangshuo Li [ Upstream commit b74030fbf187b43c1f85b66a7082e9946511cb5d ] rio_alloc_net() stores the newly allocated rio_net in mport->net before rio_scan_alloc_net() registers the device. If rio_add_net() fails, rio_scan_alloc_net() drops the device reference with put_device(), which releases the rio_net through the device release callback. However, mport->net is left pointing at the freed object. A later mport unregister path can then dereference the dangling mport->net pointer and may try to free the same rio_net again. Clear mport->net in the rio_add_net() failure path, matching the cleanup done for the destID table allocation failure path. Link: https://lore.kernel.org/20260708070628.721010-1-lgs201920130244@gmail.com Fixes: e842f9a1edf3 ("rapidio: add check for rio_add_net() in rio_scan_alloc_net()") Signed-off-by: Guangshuo Li Cc: Alexandre Bounine Cc: Matt Porter Cc: Yang yingliang Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin --- drivers/rapidio/rio-scan.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c index dcd6619a4b027..3cc25d0534513 100644 --- a/drivers/rapidio/rio-scan.c +++ b/drivers/rapidio/rio-scan.c @@ -874,6 +874,7 @@ static struct rio_net *rio_scan_alloc_net(struct rio_mport *mport, net->dev.release = rio_scan_release_dev; if (rio_add_net(net)) { put_device(&net->dev); + mport->net = NULL; net = NULL; } } -- 2.53.0