netdev - Re: [PATCH net v4 1/3] tcp: fix rejected syncookies due to stale timestamps

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3eaa158d-32e6-d541-d0fc-d1b79738f84f@gmail.com>
Date:   Fri, 6 Dec 2019 17:49:51 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Guillaume Nault <gnault@...hat.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Arnd Bergmann <arnd@...db.de>,
        John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH net v4 1/3] tcp: fix rejected syncookies due to stale
 timestamps



On 12/6/19 3:38 AM, Guillaume Nault wrote:
> If no synflood happens for a long enough period of time, then the
> synflood timestamp isn't refreshed and jiffies can advance so much
> that time_after32() can't accurately compare them any more.
...
> 
> Fixes: cca9bab1b72c ("tcp: use monotonic timestamps for PAWS")
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Guillaume Nault <gnault@...hat.com>

Signed-off-by: Eric Dumazet <edumazet@...gle.com>