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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <yq139x3y411.fsf@sermon.lab.mkp.net>
Date:	Thu, 03 Jun 2010 21:34:18 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Dave Chinner <david@...morbit.com>
Cc:	Christof Schmitt <christof.schmitt@...ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.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

>>>>> "Dave" == Dave Chinner <david@...morbit.com> writes:

Dave> If you are running DIF hardware, then XFS is only OK for direct
Dave> IO.  XFS will still get torn writes if you are overwriting
Dave> buffered data (either by write() or mmap()) because there are no
Dave> interlocks to prevent cached pages under writeback from being
Dave> modified while DMA is being performed.....

Didn't you use to wait_on_page_writeback() in page_mkwrite()?

-- 
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/