linux-kernel - Re: Wrong DIF guard tag on ext2 write

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]

Date:	Tue, 01 Jun 2010 09:17:36 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Nick Piggin <npiggin@...e.de>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Christof Schmitt <christof.schmitt@...ibm.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: Wrong DIF guard tag on ext2 write

>>>>> "Nick" == Nick Piggin <npiggin@...e.de> writes:

>> Yep, known bug.  Page writeback locking is messed up for buffer_head
>> users.  The extNfs folks volunteered to look into this a while back
>> but I don't think they have found the time yet.

Nick> What do you mean by messed up? Allowing modifications to the page
Nick> while it is under writeback? This is deliberate of course and not
Nick> limited to buffer_head users either.

Messed up in the sense that (at least last I looked) very few
buffer_head users were aware of the existence of the page writeback bit.

-- 
Martin K. Petersen	Oracle Linux Engineering
--
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/