[RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled

All of lore.kernel.org
 help / color / mirror / Atom feed

From: Juerg Haefliger <juerg.haefliger@hpe.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	kernel-hardening@lists.openwall.com,
	linux-x86_64@vger.kernel.org
Cc: juerg.haefliger@hpe.com, vpk@cs.columbia.edu
Subject: [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled
Date: Wed, 14 Sep 2016 09:19:01 +0200	[thread overview]
Message-ID: <20160914071901.8127-4-juerg.haefliger@hpe.com> (raw)
In-Reply-To: <20160914071901.8127-1-juerg.haefliger@hpe.com>

This is a temporary hack to prevent the use of bio_map_user_iov()
which causes XPFO page faults.

Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
---
 block/blk-map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-map.c b/block/blk-map.c
index b8657fa8dc9a..e889dbfee6fb 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -52,7 +52,7 @@ static int __blk_rq_map_user_iov(struct request *rq,
 	struct bio *bio, *orig_bio;
 	int ret;
 
-	if (copy)
+	if (copy || IS_ENABLED(CONFIG_XPFO))
 		bio = bio_copy_user_iov(q, map_data, iter, gfp_mask);
 	else
 		bio = bio_map_user_iov(q, iter, gfp_mask);
-- 
2.9.3

WARNING: multiple messages have this Message-ID (diff)

From: Juerg Haefliger <juerg.haefliger@hpe.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	kernel-hardening@lists.openwall.com,
	linux-x86_64@vger.kernel.org
Cc: juerg.haefliger@hpe.com, vpk@cs.columbia.edu
Subject: [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled
Date: Wed, 14 Sep 2016 09:19:01 +0200	[thread overview]
Message-ID: <20160914071901.8127-4-juerg.haefliger@hpe.com> (raw)
In-Reply-To: <20160914071901.8127-1-juerg.haefliger@hpe.com>

This is a temporary hack to prevent the use of bio_map_user_iov()
which causes XPFO page faults.

Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
---
 block/blk-map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-map.c b/block/blk-map.c
index b8657fa8dc9a..e889dbfee6fb 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -52,7 +52,7 @@ static int __blk_rq_map_user_iov(struct request *rq,
 	struct bio *bio, *orig_bio;
 	int ret;
 
-	if (copy)
+	if (copy || IS_ENABLED(CONFIG_XPFO))
 		bio = bio_copy_user_iov(q, map_data, iter, gfp_mask);
 	else
 		bio = bio_map_user_iov(q, iter, gfp_mask);
-- 
2.9.3

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

WARNING: multiple messages have this Message-ID (diff)

From: Juerg Haefliger <juerg.haefliger@hpe.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	kernel-hardening@lists.openwall.com,
	linux-x86_64@vger.kernel.org
Cc: juerg.haefliger@hpe.com, vpk@cs.columbia.edu
Subject: [kernel-hardening] [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled
Date: Wed, 14 Sep 2016 09:19:01 +0200	[thread overview]
Message-ID: <20160914071901.8127-4-juerg.haefliger@hpe.com> (raw)
In-Reply-To: <20160914071901.8127-1-juerg.haefliger@hpe.com>

This is a temporary hack to prevent the use of bio_map_user_iov()
which causes XPFO page faults.

Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
---
 block/blk-map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-map.c b/block/blk-map.c
index b8657fa8dc9a..e889dbfee6fb 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -52,7 +52,7 @@ static int __blk_rq_map_user_iov(struct request *rq,
 	struct bio *bio, *orig_bio;
 	int ret;
 
-	if (copy)
+	if (copy || IS_ENABLED(CONFIG_XPFO))
 		bio = bio_copy_user_iov(q, map_data, iter, gfp_mask);
 	else
 		bio = bio_map_user_iov(q, iter, gfp_mask);
-- 
2.9.3

next prev parent reply	other threads:[~2016-09-14  7:19 UTC|newest]

Thread overview: 93+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-26 14:21 [RFC PATCH] Add support for eXclusive Page Frame Ownership (XPFO) Juerg Haefliger
2016-02-26 14:21 ` Juerg Haefliger
2016-03-01  1:31 ` Laura Abbott
2016-03-01  1:31   ` Laura Abbott
2016-03-21  8:37   ` Juerg Haefliger
2016-03-21  8:37     ` Juerg Haefliger
2016-03-28 19:29     ` Laura Abbott
2016-03-28 19:29       ` Laura Abbott
2016-03-01  2:10 ` Balbir Singh
2016-03-01  2:10   ` Balbir Singh
2016-03-21  8:44   ` Juerg Haefliger
2016-03-21  8:44     ` Juerg Haefliger
2016-04-01  0:21     ` Balbir Singh
2016-04-01  0:21       ` Balbir Singh
2016-09-02 11:39 ` [RFC PATCH v2 0/3] " Juerg Haefliger
2016-09-02 11:39   ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39   ` Juerg Haefliger
2016-09-02 11:39   ` [RFC PATCH v2 1/3] " Juerg Haefliger
2016-09-02 11:39     ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39     ` Juerg Haefliger
2016-09-02 11:39   ` [RFC PATCH v2 2/3] xpfo: Only put previous userspace pages into the hot cache Juerg Haefliger
2016-09-02 11:39     ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39     ` Juerg Haefliger
2016-09-02 20:39     ` Dave Hansen
2016-09-02 20:39       ` [kernel-hardening] " Dave Hansen
2016-09-02 20:39       ` Dave Hansen
2016-09-05 11:54       ` Juerg Haefliger
2016-09-05 11:54         ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39   ` [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled Juerg Haefliger
2016-09-02 11:39     ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39     ` Juerg Haefliger
2016-09-14  7:18   ` [RFC PATCH v2 0/3] Add support for eXclusive Page Frame Ownership (XPFO) Juerg Haefliger
2016-09-14  7:18     ` [kernel-hardening] " Juerg Haefliger
2016-09-14  7:18     ` Juerg Haefliger
2016-09-14  7:18     ` [RFC PATCH v2 1/3] " Juerg Haefliger
2016-09-14  7:18       ` [kernel-hardening] " Juerg Haefliger
2016-09-14  7:18       ` Juerg Haefliger
2016-09-14  7:19     ` [RFC PATCH v2 2/3] xpfo: Only put previous userspace pages into the hot cache Juerg Haefliger
2016-09-14  7:19       ` [kernel-hardening] " Juerg Haefliger
2016-09-14  7:19       ` Juerg Haefliger
2016-09-14 14:33       ` [kernel-hardening] " Dave Hansen
2016-09-14 14:33         ` Dave Hansen
2016-09-14 14:40         ` Juerg Haefliger
2016-09-14 14:48           ` Dave Hansen
2016-09-14 14:48             ` Dave Hansen
2016-09-21  5:32             ` Juerg Haefliger
2016-09-14  7:19     ` Juerg Haefliger [this message]
2016-09-14  7:19       ` [kernel-hardening] [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled Juerg Haefliger
2016-09-14  7:19       ` Juerg Haefliger
2016-09-14  7:33       ` Christoph Hellwig
2016-09-14  7:33         ` [kernel-hardening] " Christoph Hellwig
2016-09-14  7:33         ` Christoph Hellwig
2016-09-14  7:23     ` [RFC PATCH v2 0/3] Add support for eXclusive Page Frame Ownership (XPFO) Juerg Haefliger
2016-09-14  7:23       ` [kernel-hardening] " Juerg Haefliger
2016-09-14  9:36     ` [kernel-hardening] " Mark Rutland
2016-09-14  9:36       ` Mark Rutland
2016-09-14  9:49       ` Mark Rutland
2016-09-14  9:49         ` Mark Rutland
2016-11-04 14:45     ` [RFC PATCH v3 0/2] " Juerg Haefliger
2016-11-04 14:45       ` [kernel-hardening] " Juerg Haefliger
2016-11-04 14:45       ` Juerg Haefliger
2016-11-04 14:45       ` [RFC PATCH v3 1/2] " Juerg Haefliger
2016-11-04 14:45         ` [kernel-hardening] " Juerg Haefliger
2016-11-04 14:45         ` Juerg Haefliger
2016-11-04 14:50         ` Christoph Hellwig
2016-11-04 14:50           ` [kernel-hardening] " Christoph Hellwig
2016-11-04 14:50           ` Christoph Hellwig
2016-11-10  5:53         ` [kernel-hardening] " ZhaoJunmin Zhao(Junmin)
2016-11-10  5:53           ` ZhaoJunmin Zhao(Junmin)
2016-11-10  5:53           ` ZhaoJunmin Zhao(Junmin)
2016-11-10 19:11         ` Kees Cook
2016-11-10 19:11           ` [kernel-hardening] " Kees Cook
2016-11-10 19:11           ` Kees Cook
2016-11-15 11:15           ` Juerg Haefliger
2016-11-15 11:15             ` [kernel-hardening] " Juerg Haefliger
2016-11-15 11:15             ` Juerg Haefliger
2016-11-10 19:24         ` Kees Cook
2016-11-10 19:24           ` [kernel-hardening] " Kees Cook
2016-11-10 19:24           ` Kees Cook
2016-11-15 11:18           ` Juerg Haefliger
2016-11-15 11:18             ` [kernel-hardening] " Juerg Haefliger
2016-11-15 11:18             ` Juerg Haefliger
2016-11-24 10:56         ` AKASHI Takahiro
2016-11-24 10:56           ` [kernel-hardening] " AKASHI Takahiro
2016-11-24 10:56           ` AKASHI Takahiro
2016-11-28 11:15           ` Juerg Haefliger
2016-11-28 11:15             ` [kernel-hardening] " Juerg Haefliger
2016-12-09  9:02           ` AKASHI Takahiro
2016-12-09  9:02             ` [kernel-hardening] " AKASHI Takahiro
2016-12-09  9:02             ` AKASHI Takahiro
2016-11-04 14:45       ` [RFC PATCH v3 2/2] xpfo: Only put previous userspace pages into the hot cache Juerg Haefliger
2016-11-04 14:45         ` [kernel-hardening] " Juerg Haefliger
2016-11-04 14:45         ` Juerg Haefliger

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:b8657fa8dc9 dfblob:b8657fa8dc9 dfblob:b8657fa8dc9
dfblob:e889dbfee6f dfblob:e889dbfee6f dfblob:e889dbfee6f
	(help)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20160914071901.8127-4-juerg.haefliger@hpe.com \
    --to=juerg.haefliger@hpe.com \
    --cc=kernel-hardening@lists.openwall.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-x86_64@vger.kernel.org \
    --cc=vpk@cs.columbia.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Be sure your reply has a Subject: header at the top and a blank line before the message body.

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.