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  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]
Date:   Wed, 19 Aug 2020 09:00:22 +0200
From:   Sebastian Andrzej Siewior <>
To:     Guenter Roeck <>
Cc:     Valdis Klētnieks <>,
        Mark Starovoytov <>,
        Igor Russkikh <>,
        "David S. Miller" <>,
        Greg KH <>,
        "Ahmed S. Darwish" <>,,,,,,,
Subject: Re: [PATCH] Revert "seqlock: lockdep assert non-preemptibility on
 seqcount_t write"

On 2020-08-18 17:56:49 [-0700], Guenter Roeck wrote:
> Nice catch. FWIW, there is no obvious reason why this would need to be atomic.
> The calling code does not set a lock, meaning there can be two (or more)
> callers entering this code. Weird, especially since the code looks like it
> would actually need a mutex to work correctly. It might be interesting to
> see what happens if there are, say, half a dozen scripts/processes trying
> to read the hwmon attribute introduced by this patch at the same time.


> Guenter


Powered by blists - more mailing lists