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 C7AD528369 for ; Wed, 15 Nov 2023 20:52:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="O+d3PuQA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77CCEC4E769; Wed, 15 Nov 2023 20:52:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700081533; bh=4k9MSaUV/8w+TkuOBqd4qOQjSuu9bWKdrSmeF1XsDhA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O+d3PuQA3wDuiBxiGQLyLPW6cg/19aW9x/aItW9fBkb7E4g3wxebd65pYdQKxhznI 7UKrZ+KKyiRrIvr1vJFJX8OcEBRbyUtMMzUIfRtE8SP9h13HGpE7h5uttVo4W42MeI lzKtuJTOsymRulXDZ6TfcOgzEJ5/GQIK8FrW55Js= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Dmitry Torokhov , Sasha Levin Subject: [PATCH 5.15 211/244] Input: synaptics-rmi4 - fix use after free in rmi_unregister_function() Date: Wed, 15 Nov 2023 15:36:43 -0500 Message-ID: <20231115203601.017658273@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115203548.387164783@linuxfoundation.org> References: <20231115203548.387164783@linuxfoundation.org> User-Agent: quilt/0.67 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: Dan Carpenter [ Upstream commit eb988e46da2e4eae89f5337e047ce372fe33d5b1 ] The put_device() calls rmi_release_function() which frees "fn" so the dereference on the next line "fn->num_of_irqs" is a use after free. Move the put_device() to the end to fix this. Fixes: 24d28e4f1271 ("Input: synaptics-rmi4 - convert irq distribution to irq_domain") Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/706efd36-7561-42f3-adfa-dd1d0bd4f5a1@moroto.mountain Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- drivers/input/rmi4/rmi_bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c index 24f31a5c0e04a..014bb40e84236 100644 --- a/drivers/input/rmi4/rmi_bus.c +++ b/drivers/input/rmi4/rmi_bus.c @@ -276,11 +276,11 @@ void rmi_unregister_function(struct rmi_function *fn) device_del(&fn->dev); of_node_put(fn->dev.of_node); - put_device(&fn->dev); for (i = 0; i < fn->num_of_irqs; i++) irq_dispose_mapping(fn->irq[i]); + put_device(&fn->dev); } /** -- 2.42.0