From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: Johan Hovold <johan@kernel.org>, Greg KH <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [BUG] usb: serial: garmin_gps: A possible concurrency use-after-free bug
Date: Thu, 20 Dec 2018 21:41:16 +0800 [thread overview]
Message-ID: <8b24e2fc-df9a-8e06-aa49-a27675fd36e9@gmail.com> (raw)
In drivers/usb/serial/garmin_gps.c,
the functions garmin_read_bulk_callback() and garmin_write_bulk_callback()
may be concurrently executed.
In garmin_write_bulk_callback() on line 969:
kfree(urb->transfer_buffer);
In garmin_read_bulk_callback() on line 1165:
unsigned char *data = urb->transfer_buffer;
Thus, a concurrency use-after-free bug may occur.
This possible bug is found by a static analysis tool written by myself.
Best wishes,
Jia-Ju Bai
next reply other threads:[~2018-12-20 13:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-20 13:41 Jia-Ju Bai [this message]
2018-12-20 13:46 ` [BUG] usb: serial: garmin_gps: A possible concurrency use-after-free bug Johan Hovold
2018-12-20 13:48 ` Jia-Ju Bai
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