linux-kernel - Re: [PATCH] tools/liblockdep: Fix debug

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: <5485BCEA.30207@oracle.com>
Date:	Mon, 08 Dec 2014 09:59:54 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Kirill Smelkov <kirr@...edi.com>
CC:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tools/liblockdep: Fix debug_check thinko in mutex destroy

On 12/08/2014 06:07 AM, Kirill Smelkov wrote:
> In mutex destroy code currently we pass to debug_check_no_locks_freed()
> 
>     [mem_from, mem_end)
> 
> address region. But debug_check_no_locks_freed() accepts
> 
>     mem_from, mem_*len*
> 
> i.e. second parameter is region length, not end address. And it was
> always so, starting from 2006 (fbb9ce95 "lockdep: core").
> 
> Fix it, or else on a mutex destroy we wrongly check
> much-wider-than-mutex region and can find not-yet-released other locks
> there and wrongly report BUGs on them.

Great catch, thanks!


Thanks,
Sasha
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/