[lkml]   [2018]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [BUG] usb: serial: garmin_gps: A possible concurrency use-after-free bug

On 2018/12/20 21:46, Johan Hovold wrote:
> On Thu, Dec 20, 2018 at 09:41:16PM +0800, Jia-Ju Bai wrote:
>> 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.
> No, they operate on different struct urb.
>> This possible bug is found by a static analysis tool written by myself.
> Seems you need to update your tool. Please also make sure to review its
> output before reporting anything.

Okay, thanks for your reply.
Sorry for my false positive...

Best wishes,
Jia-Ju Bai

 \ /
  Last update: 2018-12-20 14:49    [W:0.089 / U:4.880 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site