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 564FD3890E0 for ; Tue, 14 Jul 2026 16:02:40 +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=1784044961; cv=none; b=jetrTnVGjRqZpAmZnK2SR99pOD2P7Daf7i2hihJykdz0Qqzb65T+4vIeARX+EZsWhCbrQlOdNBlrehCjhDyiun6i7ooZGsNm5DrIwfvWLcj/3tKcwSRydHKNumAfqH1wP8MtLFuzVgk0kdVPiouhhsdL01c52eOB0IrMT3JrUfU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784044961; c=relaxed/simple; bh=hByhfpvijs+grwgnqAAh+os/ZOGEHFK5+as4pBzgwKU=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=H3NiqJdMAKBhfqH0/Cv4lfgZ7BtFF5myzXCZMzCEKE2jEEauDUoNHENT8nuuh164qYpTRSDqvznV4cl5uEUTfJquzvKMtmWeIPi9GvC0mJpS47N1QGEsUz9UoFpoQXL16GrlGgDUBImtCYFP0e5ZK9QRLsQLfyrJZw0vhh7A6WA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=qEDrBK+C; 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="qEDrBK+C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6ECE41F000E9; Tue, 14 Jul 2026 16:02:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784044959; bh=bh1IiZ+zC/3hznHUKOxZL45ypq+JDeOPDinUueQYeoY=; h=Subject:To:Cc:From:Date; b=qEDrBK+CgK/nGf0fSDw1Za4Pngt8cIIRMm1G8bmQ5Js9/c6a9Be670OZ8AjrryakR BSap4Yzo6AEdGg2IeMgEajEkOxgqZQRX22DoC0hJKjXbyeNwalxbQf07LxKpMeL0KN TLFFb2F7+NLapxO4eTXTpdqkG0ICW49E4O842LME= Subject: FAILED: patch "[PATCH] usb: free iso schedules on failed submit" failed to apply to 6.1-stable tree To: dawei.feng@seu.edu.cn,gregkh@linuxfoundation.org,stable@kernel.org,stern@rowland.harvard.edu Cc: From: Date: Tue, 14 Jul 2026 18:02:33 +0200 Message-ID: <2026071433-debating-yonder-99d6@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x b9399d25fbb34a05bbe76eeedd730f62ff2670e9 # git commit -s git send-email --to '' --in-reply-to '2026071433-debating-yonder-99d6@gregkh' --subject-prefix 'PATCH 6.1.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b9399d25fbb34a05bbe76eeedd730f62ff2670e9 Mon Sep 17 00:00:00 2001 From: Dawei Feng Date: Tue, 30 Jun 2026 15:14:19 +0800 Subject: [PATCH] usb: free iso schedules on failed submit EHCI and FOTG210 isochronous submits build an ehci_iso_sched before linking the URB to the endpoint queue, and keep the staged schedule in urb->hcpriv until iso_stream_schedule() and the link helpers consume it. If the controller is no longer accessible, or usb_hcd_link_urb_to_ep() fails, submit jumps to done_not_linked before that handoff happens and leaks the staged schedule still attached to urb->hcpriv. Free the staged schedule from done_not_linked when submit fails before the URB is linked and clear urb->hcpriv after the free. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. As we do not have an EHCI host controller with a USB isochronous device to test with, no runtime testing was able to be performed. Fixes: 8de98402652c ("[PATCH] USB: Fix USB suspend/resume crasher (#2)") Fixes: e9df41c5c589 ("USB: make HCDs responsible for managing endpoint queues") Fixes: 7d50195f6c50 ("usb: host: Faraday fotg210-hcd driver") Cc: stable Signed-off-by: Dawei Feng Reviewed-by: Alan Stern Link: https://patch.msgid.link/20260630071419.349161-1-dawei.feng@seu.edu.cn Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/fotg210/fotg210-hcd.c b/drivers/usb/fotg210/fotg210-hcd.c index 1a48329a4e08..956be5b56510 100644 --- a/drivers/usb/fotg210/fotg210-hcd.c +++ b/drivers/usb/fotg210/fotg210-hcd.c @@ -4267,8 +4267,6 @@ static int iso_stream_schedule(struct fotg210_hcd *fotg210, struct urb *urb, return 0; fail: - iso_sched_free(stream, sched); - urb->hcpriv = NULL; return status; } @@ -4562,6 +4560,10 @@ static int itd_submit(struct fotg210_hcd *fotg210, struct urb *urb, else usb_hcd_unlink_urb_from_ep(fotg210_to_hcd(fotg210), urb); done_not_linked: + if (status < 0) { + iso_sched_free(stream, urb->hcpriv); + urb->hcpriv = NULL; + } spin_unlock_irqrestore(&fotg210->lock, flags); done: return status; diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index a241337c9af8..57d07d1c2dfa 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -1623,6 +1623,7 @@ iso_stream_schedule( status = 1; /* and give it back immediately */ iso_sched_free(stream, sched); sched = NULL; + urb->hcpriv = NULL; } } urb->error_count = skip / period; @@ -1653,8 +1654,6 @@ iso_stream_schedule( return status; fail: - iso_sched_free(stream, sched); - urb->hcpriv = NULL; return status; } @@ -1966,6 +1965,10 @@ static int itd_submit(struct ehci_hcd *ehci, struct urb *urb, usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb); } done_not_linked: + if (status < 0) { + iso_sched_free(stream, urb->hcpriv); + urb->hcpriv = NULL; + } spin_unlock_irqrestore(&ehci->lock, flags); done: return status; @@ -2343,6 +2346,10 @@ static int sitd_submit(struct ehci_hcd *ehci, struct urb *urb, usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb); } done_not_linked: + if (status < 0) { + iso_sched_free(stream, urb->hcpriv); + urb->hcpriv = NULL; + } spin_unlock_irqrestore(&ehci->lock, flags); done: return status;