linux-kernel - Regression in v4.2-rc1: vmalloc_to

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-next>] [day] [month] [year] [list]

Message-ID: <6DC2528F945B4149AB6566DFB5F22ED39BC5540B@ORSMSX115.amr.corp.intel.com>
Date:	Sat, 18 Jul 2015 18:04:21 +0000
From:	"Dixit, Ashutosh" <ashutosh.dixit@...el.com>
To:	'Toshi Kani' <toshi.kani@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	"Dutt, Sudeep" <sudeep.dutt@...el.com>,
	"Rao, Nikhil" <nikhil.rao@...el.com>,
	"Williams, Dan J" <dan.j.williams@...el.com>
Subject: Regression in v4.2-rc1: vmalloc_to_page with ioremap

vmalloc_to_page with ioremap'd memory used to work correctly till v4.1. In
v4.2-rc1 when ioremap is done using huge pages vmalloc_to_page on ioremap'd
memory crashes. Are there plans to fix this?

An example of the use of vmalloc_to_page with ioremap is in the Intel MIC SCIF
driver (drivers/misc/mic/scif/scif_nodeqp.c) which dma map's the ioremap'd range
of one device to a second device.

Thanks,
Ashutosh
--
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/