From: Johan Hovold <johan@kernel.org> stable inclusion from stable-v6.6.145 commit 164398601a7f160bc3df1efa454f983302cef03f category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16637 CVE: CVE-2026-64341 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit bc0e4f16c44e50daa0b1ea729934baa3b4815dee upstream. Submitted write URBs are not stopped on close() and therefore need to be stopped unconditionally on disconnect() to avoid use-after-free in the completion handler. Fixes: b5f8d46867ca ("USB: iowarrior: fix use-after-free after driver unbind") Fixes: 946b960d13c1 ("USB: add driver for iowarrior devices.") Reported-by: syzbot+ad2aac2febc3bedf0962@syzkaller.appspotmail.com Link: https://lore.kernel.org/all/6a0ce39b.170a0220.39a13.0007.GAE@google.com/ Cc: stable <stable@kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://patch.msgid.link/20260523170523.1074563-1-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> --- drivers/usb/misc/iowarrior.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index 2d9d9490cdd4..44c47e4dcf1c 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -884,13 +884,15 @@ static void iowarrior_disconnect(struct usb_interface *interface) /* prevent device read, write and ioctl */ dev->present = 0; + /* write urbs are not stopped on close() so kill unconditionally */ + usb_kill_anchored_urbs(&dev->submitted); + if (dev->opened) { /* There is a process that holds a filedescriptor to the device , so we only shutdown read-/write-ops going on. Deleting the device is postponed until close() was called. */ usb_kill_urb(dev->int_in_urb); - usb_kill_anchored_urbs(&dev->submitted); wake_up_interruptible(&dev->read_wait); wake_up_interruptible(&dev->write_wait); mutex_unlock(&dev->mutex); -- 2.34.1