From: Liu Qi <liuqi@longcheer.com> stable inclusion from stable-6.6.157 commit 9481bc04a8c351ed883a7f0e10939bbe9120ead7 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/19256 CVE: CVE-2026-90031 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... ------------------------------ commit 445fc368c6bc73eff0aeb3818cf5f355facfbb16 upstream. ene_ub6250_probe() calls usb_stor_probe2(), which starts the usb-storage infrastructure and schedules the delayed scan work. The driver then calls ene_get_card_type(), which sends an ENE command through ene_send_scsi_cmd() and the usb-storage bulk transfer helpers. Both the delayed scan work, through usb_stor_Bulk_max_lun(), and ene_get_card_type() use us->current_urb. The scan work serializes this access with us->dev_mutex, but the ENE card-type probe does not. If the scan work runs while ene_get_card_type() is still using us->current_urb, usb_submit_urb() warns that the URB is already active. Serialize ene_get_card_type() with us->dev_mutex, matching the locking used by the scan path. Reported-by: syzbot+22ea20ef3afb6785b122@syzkaller.appspotmail.com Cc: stable <stable@kernel.org> Closes: https://syzkaller.appspot.com/bug?extid=22ea20ef3afb6785b122 Assisted-by: Qwen:Qwen3.6 Signed-off-by: Liu Qi <liuqi@longcheer.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Link: https://patch.msgid.link/20260821090416.1247127-1-liuqi@longcheer.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> --- drivers/usb/storage/ene_ub6250.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/storage/ene_ub6250.c b/drivers/usb/storage/ene_ub6250.c index 2cffc559ace5..13b332d1dbfe 100644 --- a/drivers/usb/storage/ene_ub6250.c +++ b/drivers/usb/storage/ene_ub6250.c @@ -2358,7 +2358,9 @@ static int ene_ub6250_probe(struct usb_interface *intf, return result; /* probe card type */ + mutex_lock(&us->dev_mutex); result = ene_get_card_type(us, REG_CARD_STATUS, info->bbuf); + mutex_unlock(&us->dev_mutex); if (result != USB_STOR_XFER_GOOD) { usb_stor_disconnect(intf); return USB_STOR_TRANSPORT_ERROR; -- 2.34.1