From: Edward Adam Davis <eadavis@sina.com>
To: syzbot+5fabc1ae99ff40690d84@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [usb?] KASAN: slab-use-after-free Write in keyspan_close
Date: Mon, 31 Aug 2026 07:50:31 +0800 [thread overview]
Message-ID: <20260830235031.326993-1-eadavis@sina.com> (raw)
In-Reply-To: <6a944641.4d659fcc.734b4.003c.GAE@google.com>
From: Edward Aadm Davis <eadavis@sina.com>
#syz test: upstream 08dbfad3f504
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 17edc057a311..51359815432a 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -301,11 +301,19 @@ static void serial_port_shutdown(struct tty_port *tport)
struct usb_serial_port *port =
container_of(tport, struct usb_serial_port, port);
struct usb_serial_driver *drv = port->serial->type;
+ struct usb_serial *serial = port->serial;
+
+ mutex_lock(&serial->disc_mutex);
+ if (serial->disconnected) {
+ mutex_unlock(&serial->disc_mutex);
+ return;
+ }
if (drv->close)
drv->close(port);
usb_autopm_put_interface(port->serial->interface);
+ mutex_unlock(&serial->disc_mutex);
}
static void serial_hangup(struct tty_struct *tty)
next prev parent reply other threads:[~2026-08-30 23:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-30 15:03 syzbot
2026-08-30 23:50 ` Edward Adam Davis [this message]
2026-08-31 0:14 ` syzbot
2026-08-31 0:10 ` Forwarded: [PATCH] USB: serial: keyspan: fix use-after-free " syzbot
2026-08-31 0:38 ` [syzbot] [usb?] KASAN: slab-use-after-free Write " Edward Adam Davis
2026-08-31 1:02 ` syzbot
[not found] <20260831001012.8665-1-kartikey406@gmail.com>
2026-08-31 0:37 ` syzbot
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