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 4.19-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-4.19 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
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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-4.19/revert-tracing-trigger-fix-to-return-error-if-failed-to-alloc-snapshot.patch
queue-4.19/vhost-add-smp_rmb-in-vhost_vq_avail_empty.patch
queue-4.19/comedi-vmk80xx-fix-incomplete-endpoint-checking.patch
queue-4.19/usb-serial-option-add-support-for-fibocom-fm650-fg650.patch
queue-4.19/usb-serial-option-add-telit-fn920c04-rmnet-compositions.patch
queue-4.19/usb-dwc2-host-fix-dereference-issue-in-ddma-completion-flow.patch
queue-4.19/batman-adv-avoid-infinite-loop-trying-to-resize-local-tt.patch
queue-4.19/selftests-timers-fix-abs-warning-in-posix_timers-test.patch
queue-4.19/selftests-ftrace-limit-length-in-subsystem-enable-tests.patch
queue-4.19/usb-serial-option-add-fibocom-fm135-gl-variants.patch
queue-4.19/speakup-avoid-crash-on-very-long-word.patch
queue-4.19/serial-pmac_zilog-remove-flawed-mitigation-for-rx-irq-flood.patch
queue-4.19/bluetooth-fix-memory-leak-in-hci_req_sync_complete.patch
queue-4.19/usb-serial-option-add-lonsung-u8300-u9300-product.patch
queue-4.19/usb-serial-option-support-quectel-em060k-sub-models.patch
queue-4.19/x86-apic-force-native_apic_mem_read-to-use-the-mov-instruction.patch
queue-4.19/fs-sysfs-fix-reference-leak-in-sysfs_break_active_protection.patch
queue-4.19/revert-usb-cdc-wdm-close-race-between-read-and-workqueue.patch
queue-4.19/usb-serial-option-add-rolling-rw101-gl-and-rw135-gl-support.patch
queue-4.19/kprobes-fix-possible-use-after-free-issue-on-kprobe-registration.patch
