Patch "Revert "usb: cdc-wdm: close race between read and workqueue"" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    Revert "usb: cdc-wdm: close race between read and workqueue"

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     revert-usb-cdc-wdm-close-race-between-read-and-workqueue.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 1607830dadeefc407e4956336d9fcd9e9defd810 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 18 Apr 2024 16:33:28 +0200
Subject: Revert "usb: cdc-wdm: close race between read and workqueue"
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

commit 1607830dadeefc407e4956336d9fcd9e9defd810 upstream.

This reverts commit 339f83612f3a569b194680768b22bf113c26a29d.

It has been found to cause problems in a number of Chromebook devices,
so revert the change until it can be brought back in a safe way.

Link: https://lore.kernel.org/r/385a3519-b45d-48c5-a6fd-a3fdb6bec92f@xxxxxxxxxxxx
Reported-by:: Aleksander Morgado <aleksandermj@xxxxxxxxxxxx>
Fixes: 339f83612f3a ("usb: cdc-wdm: close race between read and workqueue")
Cc: stable <stable@xxxxxxxxxx>
Cc: Oliver Neukum <oneukum@xxxxxxxx>
Cc: Bjørn Mork <bjorn@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/class/cdc-wdm.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -471,7 +471,6 @@ out_free_mem:
 static int service_outstanding_interrupt(struct wdm_device *desc)
 {
 	int rv = 0;
-	int used;
 
 	/* submit read urb only if the device is waiting for it */
 	if (!desc->resp_count || !--desc->resp_count)
@@ -486,10 +485,7 @@ static int service_outstanding_interrupt
 		goto out;
 	}
 
-	used = test_and_set_bit(WDM_RESPONDING, &desc->flags);
-	if (used)
-		goto out;
-
+	set_bit(WDM_RESPONDING, &desc->flags);
 	spin_unlock_irq(&desc->iuspin);
 	rv = usb_submit_urb(desc->response, GFP_KERNEL);
 	spin_lock_irq(&desc->iuspin);


Patches currently in stable-queue which might be from gregkh@xxxxxxxxxxxxxxxxxxx are

queue-5.10/revert-tracing-trigger-fix-to-return-error-if-failed-to-alloc-snapshot.patch
queue-5.10/vhost-add-smp_rmb-in-vhost_vq_avail_empty.patch
queue-5.10/thunderbolt-avoid-notify-pm-core-about-runtime-pm-resume.patch
queue-5.10/comedi-vmk80xx-fix-incomplete-endpoint-checking.patch
queue-5.10/usb-serial-option-add-support-for-fibocom-fm650-fg650.patch
queue-5.10/usb-serial-option-add-telit-fn920c04-rmnet-compositions.patch
queue-5.10/usb-dwc2-host-fix-dereference-issue-in-ddma-completion-flow.patch
queue-5.10/x86-cpu-actually-turn-off-mitigations-by-default-for-speculation_mitigations-n.patch
queue-5.10/batman-adv-avoid-infinite-loop-trying-to-resize-local-tt.patch
queue-5.10/selftests-timers-fix-abs-warning-in-posix_timers-test.patch
queue-5.10/selftests-ftrace-limit-length-in-subsystem-enable-tests.patch
queue-5.10/usb-serial-option-add-fibocom-fm135-gl-variants.patch
queue-5.10/init-main.c-fix-potential-static_command_line-memory-overflow.patch
queue-5.10/speakup-avoid-crash-on-very-long-word.patch
queue-5.10/usb-disable-usb3-lpm-at-shutdown.patch
queue-5.10/thunderbolt-fix-wake-configurations-after-device-unplug.patch
queue-5.10/drm-client-fully-protect-modes-with-dev-mode_config.mutex.patch
queue-5.10/serial-pmac_zilog-remove-flawed-mitigation-for-rx-irq-flood.patch
queue-5.10/bluetooth-fix-memory-leak-in-hci_req_sync_complete.patch
queue-5.10/irqflags-explicitly-ignore-lockdep_hrtimer_exit-argument.patch
queue-5.10/mailbox-imx-fix-suspend-failue.patch
queue-5.10/usb-serial-option-add-lonsung-u8300-u9300-product.patch
queue-5.10/btrfs-qgroup-correctly-model-root-qgroup-rsv-in-convert.patch
queue-5.10/usb-serial-option-support-quectel-em060k-sub-models.patch
queue-5.10/x86-apic-force-native_apic_mem_read-to-use-the-mov-instruction.patch
queue-5.10/fs-sysfs-fix-reference-leak-in-sysfs_break_active_protection.patch
queue-5.10/binder-check-offset-alignment-in-binder_get_object.patch
queue-5.10/revert-usb-cdc-wdm-close-race-between-read-and-workqueue.patch
queue-5.10/media-cec-core-remove-length-check-of-timer-status.patch
queue-5.10/usb-serial-option-add-rolling-rw101-gl-and-rw135-gl-support.patch
queue-5.10/mei-me-disable-rpl-s-on-sps-and-ign-firmwares.patch
queue-5.10/kprobes-fix-possible-use-after-free-issue-on-kprobe-registration.patch




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