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: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 11 Aug 2014 07:11:50 -0700
From:	Guenter Roeck <>
To:	Oleg Nesterov <>,
	Linus Torvalds <>
CC:	Kees Cook <>,
	"" <>,
	Andy Lutomirski <>
Subject: Re: Runtime trouble with commit dbd952127d (seccomp: introduce writer

On 08/11/2014 04:48 AM, Oleg Nesterov wrote:
> On 08/10, Linus Torvalds wrote:
>> So that should just be converted to assert_spin_is_locked().
> I still think that lockdep_assert_held() is better. Unlike
> assert_spin_locked() it checks that this lock is held by us, and this
> is what we want in this case.

assert_spin_locked maps to "BUG_ON(!raw_spin_is_locked(x))"
which it seems is exactly what the current code is doing.
I submitted a patch to make that change to use assert_spin_locked.
Presumably the author had a reason for using BUG_ON and not
lockdep_assert_held(), ie to perform the checks all the time
and not just while debugging. For me this was the safe change
to make. Anything else should, in my opinion, come from the
original author who introduced the code.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists