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 D33A330ACE4; Mon, 13 Oct 2025 15:01:38 +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=1760367698; cv=none; b=avUCPP45LiPkY29MEZRmfkQ8D+QT9abunSEGycU3hxGgInp2tPrf7T8+vAlxmwfaZwCR5CnHQS29YxDCrnkLoz4CVGiL8yuTZvUfUfAsiSWPz1szNM3ix9BIjPbjx1Wt3zm8XYykvpJRGP3WoB6zgqdgbwLN3xoQI6Pr1IntvNk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760367698; c=relaxed/simple; bh=J8K9gQqmwLjtFRHdyXvigUQq0QmohOozQ/c5GSt8pDo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mI5apRLoiodcstq2TLU+dGw92Hye+3+m5u2A5nG9bCq6xKEwzrG1RHYjEHNioKpzbZQgC4oV7BLzlCHmrmAPpeejfrf+F8wWG6yrMIfVMYLNoTfBfePAfafMBl3rcVMl64GnAs+daoUTLcJONrljhr5EWMkiCw76I1NkUAI5+uk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IN4u0vuT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IN4u0vuT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C183C116D0; Mon, 13 Oct 2025 15:01:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760367698; bh=J8K9gQqmwLjtFRHdyXvigUQq0QmohOozQ/c5GSt8pDo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IN4u0vuT2gvmNMXU+ttWBcuw6JmAFqJzGtIMUNl16bcF6e+iA03sI5JBd/k0uFBNc qUqxLQW6NR+TOkYNqAVlymPEE6tt7/4tOK3+ZOen5m1icRFdwm4GeK2Q8Ygt79YF2Z A8vhVgHNJFnh/mn4rLeod8XBlZ9t1iWKiOBerlmo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Sasha Levin Subject: [PATCH 6.6 068/196] usb: host: max3421-hcd: Fix error pointer dereference in probe cleanup Date: Mon, 13 Oct 2025 16:44:19 +0200 Message-ID: <20251013144317.653925544@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144315.184275491@linuxfoundation.org> References: <20251013144315.184275491@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter [ Upstream commit 186e8f2bdba551f3ae23396caccd452d985c23e3 ] The kthread_run() function returns error pointers so the max3421_hcd->spi_thread pointer can be either error pointers or NULL. Check for both before dereferencing it. Fixes: 05dfa5c9bc37 ("usb: host: max3421-hcd: fix "spi_rd8" uses dynamic stack allocation warning") Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/aJTMVAPtRe5H6jug@stanley.mountain Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/host/max3421-hcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/host/max3421-hcd.c b/drivers/usb/host/max3421-hcd.c index cc1f579f02de1..2d792ab271e2a 100644 --- a/drivers/usb/host/max3421-hcd.c +++ b/drivers/usb/host/max3421-hcd.c @@ -1916,7 +1916,7 @@ max3421_probe(struct spi_device *spi) if (hcd) { kfree(max3421_hcd->tx); kfree(max3421_hcd->rx); - if (max3421_hcd->spi_thread) + if (!IS_ERR_OR_NULL(max3421_hcd->spi_thread)) kthread_stop(max3421_hcd->spi_thread); usb_put_hcd(hcd); } -- 2.51.0