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Update to 3.2.2 

svn path=/dists/trunk/linux-2.6/; revision=18633
This commit is contained in:
Ben Hutchings 2012-01-26 04:48:16 +00:00
parent 16714d07ec
commit 77b3487e37
8 changed files with 8 additions and 778 deletions
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9
debian/changelog vendored
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@ -1,4 +1,11 @@
linux-2.6 (3.2.1-3) UNRELEASED; urgency=low
linux-2.6 (3.2.2-1) UNRELEASED; urgency=low
* New upstream stable update:
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
- ext4: fix undefined behavior in ext4_fill_flex_info() (CVE-2009-4307)
- Unused iocbs in a batch should not be accounted as active (CVE-2012-0058)
- uvcvideo: Fix integer overflow in uvc_ioctl_ctrl_map()
- [arm] proc: clear_refs: do not clear reserved pages
[ Ben Hutchings ]
* Stop changing 'build' and 'source' symlinks in linux-image maintainer

164
debian/patches/bugfix/all/block-add-and-use-scsi_blk_cmd_ioctl.patch vendored
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@ -1,164 +0,0 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 12 Jan 2012 16:01:27 +0100
Subject: [PATCH 1/3] block: add and use scsi_blk_cmd_ioctl
commit 577ebb374c78314ac4617242f509e2f5e7156649 upstream.
Introduce a wrapper around scsi_cmd_ioctl that takes a block device.
The function will then be enhanced to detect partition block devices
and, in that case, subject the ioctls to whitelisting.
Cc: linux-scsi@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: James Bottomley <JBottomley@parallels.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
block/scsi_ioctl.c | 7 +++++++
drivers/block/cciss.c | 6 +++---
drivers/block/ub.c | 3 +--
drivers/block/virtio_blk.c | 4 ++--
drivers/cdrom/cdrom.c | 3 +--
drivers/ide/ide-floppy_ioctl.c | 3 +--
drivers/scsi/sd.c | 2 +-
include/linux/blkdev.h | 2 ++
8 files changed, 18 insertions(+), 12 deletions(-)
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index fbdf0d8..a2c11f3 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -690,6 +690,13 @@ int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mod
}
EXPORT_SYMBOL(scsi_cmd_ioctl);
+int scsi_cmd_blk_ioctl(struct block_device *bd, fmode_t mode,
+ unsigned int cmd, void __user *arg)
+{
+ return scsi_cmd_ioctl(bd->bd_disk->queue, bd->bd_disk, mode, cmd, arg);
+}
+EXPORT_SYMBOL(scsi_cmd_blk_ioctl);
+
static int __init blk_scsi_ioctl_init(void)
{
blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 587cce5..b0f553b 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1735,7 +1735,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
case CCISS_BIG_PASSTHRU:
return cciss_bigpassthru(h, argp);
- /* scsi_cmd_ioctl handles these, below, though some are not */
+ /* scsi_cmd_blk_ioctl handles these, below, though some are not */
/* very meaningful for cciss. SG_IO is the main one people want. */
case SG_GET_VERSION_NUM:
@@ -1746,9 +1746,9 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
case SG_EMULATED_HOST:
case SG_IO:
case SCSI_IOCTL_SEND_COMMAND:
- return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
+ return scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
- /* scsi_cmd_ioctl would normally handle these, below, but */
+ /* scsi_cmd_blk_ioctl would normally handle these, below, but */
/* they aren't a good fit for cciss, as CD-ROMs are */
/* not supported, and we don't have any bus/target/lun */
/* which we present to the kernel. */
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 0e376d4..7333b9e 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -1744,12 +1744,11 @@ static int ub_bd_release(struct gendisk *disk, fmode_t mode)
static int ub_bd_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
- struct gendisk *disk = bdev->bd_disk;
void __user *usermem = (void __user *) arg;
int ret;
mutex_lock(&ub_mutex);
- ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
+ ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, usermem);
mutex_unlock(&ub_mutex);
return ret;
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index ffd5ca9..c4a60ba 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -250,8 +250,8 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI))
return -ENOTTY;
- return scsi_cmd_ioctl(disk->queue, disk, mode, cmd,
- (void __user *)data);
+ return scsi_cmd_blk_ioctl(bdev, mode, cmd,
+ (void __user *)data);
}
/* We provide getgeo only to please some old bootloader/partitioning tools */
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 1bbf764..55eaf47 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2746,12 +2746,11 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
{
void __user *argp = (void __user *)arg;
int ret;
- struct gendisk *disk = bdev->bd_disk;
/*
* Try the generic SCSI command ioctl's first.
*/
- ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
+ ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
if (ret != -ENOTTY)
return ret;
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
index d267b7a..a22ca84 100644
--- a/drivers/ide/ide-floppy_ioctl.c
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -292,8 +292,7 @@ int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev,
* and CDROM_SEND_PACKET (legacy) ioctls
*/
if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
- err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
- mode, cmd, argp);
+ err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
if (err == -ENOTTY)
err = generic_ide_ioctl(drive, bdev, cmd, arg);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7b3f807..b4d57bb 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1097,7 +1097,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
error = scsi_ioctl(sdp, cmd, p);
break;
default:
- error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
+ error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
if (error != -ENOTTY)
break;
error = scsi_ioctl(sdp, cmd, p);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 94acd81..ca7b869 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -675,6 +675,8 @@ extern int blk_insert_cloned_request(struct request_queue *q,
struct request *rq);
extern void blk_delay_queue(struct request_queue *, unsigned long);
extern void blk_recount_segments(struct request_queue *, struct bio *);
+extern int scsi_cmd_blk_ioctl(struct block_device *, fmode_t,
+ unsigned int, void __user *);
extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
unsigned int, void __user *);
extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
--
1.7.8.2

160
debian/patches/bugfix/all/block-fail-SCSI-passthrough-ioctls-on-partition-devi.patch vendored
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@ -1,160 +0,0 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 12 Jan 2012 16:01:28 +0100
Subject: [PATCH 2/3] block: fail SCSI passthrough ioctls on partition devices
commit 0bfc96cb77224736dfa35c3c555d37b3646ef35e upstream.
Linux allows executing the SG_IO ioctl on a partition or LVM volume, and
will pass the command to the underlying block device. This is
well-known, but it is also a large security problem when (via Unix
permissions, ACLs, SELinux or a combination thereof) a program or user
needs to be granted access only to part of the disk.
This patch lets partitions forward a small set of harmless ioctls;
others are logged with printk so that we can see which ioctls are
actually sent. In my tests only CDROM_GET_CAPABILITY actually occurred.
Of course it was being sent to a (partition on a) hard disk, so it would
have failed with ENOTTY and the patch isn't changing anything in
practice. Still, I'm treating it specially to avoid spamming the logs.
In principle, this restriction should include programs running with
CAP_SYS_RAWIO. If for example I let a program access /dev/sda2 and
/dev/sdb, it still should not be able to read/write outside the
boundaries of /dev/sda2 independent of the capabilities. However, for
now programs with CAP_SYS_RAWIO will still be allowed to send the
ioctls. Their actions will still be logged.
This patch does not affect the non-libata IDE driver. That driver
however already tests for bd != bd->bd_contains before issuing some
ioctl; it could be restricted further to forbid these ioctls even for
programs running with CAP_SYS_ADMIN/CAP_SYS_RAWIO.
Cc: linux-scsi@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: James Bottomley <JBottomley@parallels.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[ Make it also print the command name when warning - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
block/scsi_ioctl.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
drivers/scsi/sd.c | 11 +++++++++--
include/linux/blkdev.h | 1 +
3 files changed, 55 insertions(+), 2 deletions(-)
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index a2c11f3..260fa80 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -24,6 +24,7 @@
#include <linux/capability.h>
#include <linux/completion.h>
#include <linux/cdrom.h>
+#include <linux/ratelimit.h>
#include <linux/slab.h>
#include <linux/times.h>
#include <asm/uaccess.h>
@@ -690,9 +691,53 @@ int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mod
}
EXPORT_SYMBOL(scsi_cmd_ioctl);
+int scsi_verify_blk_ioctl(struct block_device *bd, unsigned int cmd)
+{
+ if (bd && bd == bd->bd_contains)
+ return 0;
+
+ /* Actually none of these is particularly useful on a partition,
+ * but they are safe.
+ */
+ switch (cmd) {
+ case SCSI_IOCTL_GET_IDLUN:
+ case SCSI_IOCTL_GET_BUS_NUMBER:
+ case SCSI_IOCTL_GET_PCI:
+ case SCSI_IOCTL_PROBE_HOST:
+ case SG_GET_VERSION_NUM:
+ case SG_SET_TIMEOUT:
+ case SG_GET_TIMEOUT:
+ case SG_GET_RESERVED_SIZE:
+ case SG_SET_RESERVED_SIZE:
+ case SG_EMULATED_HOST:
+ return 0;
+ case CDROM_GET_CAPABILITY:
+ /* Keep this until we remove the printk below. udev sends it
+ * and we do not want to spam dmesg about it. CD-ROMs do
+ * not have partitions, so we get here only for disks.
+ */
+ return -ENOIOCTLCMD;
+ default:
+ break;
+ }
+
+ /* In particular, rule out all resets and host-specific ioctls. */
+ printk_ratelimited(KERN_WARNING
+ "%s: sending ioctl %x to a partition!\n", current->comm, cmd);
+
+ return capable(CAP_SYS_RAWIO) ? 0 : -ENOIOCTLCMD;
+}
+EXPORT_SYMBOL(scsi_verify_blk_ioctl);
+
int scsi_cmd_blk_ioctl(struct block_device *bd, fmode_t mode,
unsigned int cmd, void __user *arg)
{
+ int ret;
+
+ ret = scsi_verify_blk_ioctl(bd, cmd);
+ if (ret < 0)
+ return ret;
+
return scsi_cmd_ioctl(bd->bd_disk->queue, bd->bd_disk, mode, cmd, arg);
}
EXPORT_SYMBOL(scsi_cmd_blk_ioctl);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index b4d57bb..c691fb5 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1075,6 +1075,10 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
"cmd=0x%x\n", disk->disk_name, cmd));
+ error = scsi_verify_blk_ioctl(bdev, cmd);
+ if (error < 0)
+ return error;
+
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
@@ -1267,6 +1271,11 @@ static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
+ int ret;
+
+ ret = scsi_verify_blk_ioctl(bdev, cmd);
+ if (ret < 0)
+ return ret;
/*
* If we are in the middle of error recovery, don't let anyone
@@ -1278,8 +1287,6 @@ static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
return -ENODEV;
if (sdev->host->hostt->compat_ioctl) {
- int ret;
-
ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
return ret;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ca7b869..0ed1eb0 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -675,6 +675,7 @@ extern int blk_insert_cloned_request(struct request_queue *q,
struct request *rq);
extern void blk_delay_queue(struct request_queue *, unsigned long);
extern void blk_recount_segments(struct request_queue *, struct bio *);
+extern int scsi_verify_blk_ioctl(struct block_device *, unsigned int);
extern int scsi_cmd_blk_ioctl(struct block_device *, fmode_t,
unsigned int, void __user *);
extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
--
1.7.8.2

88
debian/patches/bugfix/all/dm-do-not-forward-ioctls-from-logical-volumes-to-the.patch vendored
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@ -1,88 +0,0 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 12 Jan 2012 16:01:29 +0100
Subject: [PATCH 3/3] dm: do not forward ioctls from logical volumes to the
underlying device
commit ec8013beddd717d1740cfefb1a9b900deef85462 upstream.
A logical volume can map to just part of underlying physical volume.
In this case, it must be treated like a partition.
Based on a patch from Alasdair G Kergon.
Cc: Alasdair G Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/md/dm-flakey.c | 11 ++++++++++-
drivers/md/dm-linear.c | 12 +++++++++++-
drivers/md/dm-mpath.c | 6 ++++++
3 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
index f84c080..9fb18c1 100644
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -368,8 +368,17 @@ static int flakey_status(struct dm_target *ti, status_type_t type,
static int flakey_ioctl(struct dm_target *ti, unsigned int cmd, unsigned long arg)
{
struct flakey_c *fc = ti->private;
+ struct dm_dev *dev = fc->dev;
+ int r = 0;
- return __blkdev_driver_ioctl(fc->dev->bdev, fc->dev->mode, cmd, arg);
+ /*
+ * Only pass ioctls through if the device sizes match exactly.
+ */
+ if (fc->start ||
+ ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT)
+ r = scsi_verify_blk_ioctl(NULL, cmd);
+
+ return r ? : __blkdev_driver_ioctl(dev->bdev, dev->mode, cmd, arg);
}
static int flakey_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 3921e3b..9728839 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -116,7 +116,17 @@ static int linear_ioctl(struct dm_target *ti, unsigned int cmd,
unsigned long arg)
{
struct linear_c *lc = (struct linear_c *) ti->private;
- return __blkdev_driver_ioctl(lc->dev->bdev, lc->dev->mode, cmd, arg);
+ struct dm_dev *dev = lc->dev;
+ int r = 0;
+
+ /*
+ * Only pass ioctls through if the device sizes match exactly.
+ */
+ if (lc->start ||
+ ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT)
+ r = scsi_verify_blk_ioctl(NULL, cmd);
+
+ return r ? : __blkdev_driver_ioctl(dev->bdev, dev->mode, cmd, arg);
}
static int linear_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 5e0090e..801d92d 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1520,6 +1520,12 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd,
spin_unlock_irqrestore(&m->lock, flags);
+ /*
+ * Only pass ioctls through if the device sizes match exactly.
+ */
+ if (!r && ti->len != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT)
+ r = scsi_verify_blk_ioctl(NULL, cmd);
+
return r ? : __blkdev_driver_ioctl(bdev, mode, cmd, arg);
}
--
1.7.8.2

51
debian/patches/bugfix/all/media-V4L-DVB-v4l2-ioctl-integer-overflow-in-video_usercopy.patch vendored
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@ -1,51 +0,0 @@
Subject: [media] V4L/DVB: v4l2-ioctl: integer overflow in video_usercopy()
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu Jan 5 02:27:57 2012 -0300
If ctrls->count is too high the multiplication could overflow and
array_size would be lower than expected. Mauro and Hans Verkuil
suggested that we cap it at 1024. That comes from the maximum
number of controls with lots of room for expantion.
$ grep V4L2_CID include/linux/videodev2.h | wc -l
211
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/video/v4l2-ioctl.c | 4 ++++
include/linux/videodev2.h | 1 +
2 files changed, 5 insertions(+), 0 deletions(-)
---
http://git.linuxtv.org/media_tree.git?a=commitdiff;h=6c06108be53ca5e94d8b0e93883d534dd9079646
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index e1da8fc..639abee 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -2226,6 +2226,10 @@ static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
struct v4l2_ext_controls *ctrls = parg;
if (ctrls->count != 0) {
+ if (ctrls->count > V4L2_CID_MAX_CTRLS) {
+ ret = -EINVAL;
+ break;
+ }
*user_ptr = (void __user *)ctrls->controls;
*kernel_ptr = (void *)&ctrls->controls;
*array_size = sizeof(struct v4l2_ext_control)
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 6bfaa76..b2e1331 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1132,6 +1132,7 @@ struct v4l2_querymenu {
#define V4L2_CTRL_FLAG_NEXT_CTRL 0x80000000
/* User-class control IDs defined by V4L2 */
+#define V4L2_CID_MAX_CTRLS 1024
#define V4L2_CID_BASE (V4L2_CTRL_CLASS_USER | 0x900)
#define V4L2_CID_USER_BASE V4L2_CID_BASE
/* IDs reserved for driver specific controls */

269
debian/patches/bugfix/all/proc-clean-up-and-fix-proc-pid-mem-handling.patch vendored
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@ -1,269 +0,0 @@
From e268337dfe26dfc7efd422a804dbb27977a3cccc Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 17 Jan 2012 15:21:19 -0800
Subject: proc: clean up and fix /proc/<pid>/mem handling
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Linus Torvalds <torvalds@linux-foundation.org>
commit e268337dfe26dfc7efd422a804dbb27977a3cccc upstream.
Jüri Aedla reported that the /proc/<pid>/mem handling really isn't very
robust, and it also doesn't match the permission checking of any of the
other related files.
This changes it to do the permission checks at open time, and instead of
tracking the process, it tracks the VM at the time of the open. That
simplifies the code a lot, but does mean that if you hold the file
descriptor open over an execve(), you'll continue to read from the _old_
VM.
That is different from our previous behavior, but much simpler. If
somebody actually finds a load where this matters, we'll need to revert
this commit.
I suspect that nobody will ever notice - because the process mapping
addresses will also have changed as part of the execve. So you cannot
actually usefully access the fd across a VM change simply because all
the offsets for IO would have changed too.
Reported-by: Jüri Aedla <asd@ut.ee>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/proc/base.c | 145 +++++++++++++++------------------------------------------
1 file changed, 39 insertions(+), 106 deletions(-)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -194,65 +194,7 @@ static int proc_root_link(struct inode *
return result;
}
-static struct mm_struct *__check_mem_permission(struct task_struct *task)
-{
- struct mm_struct *mm;
-
- mm = get_task_mm(task);
- if (!mm)
- return ERR_PTR(-EINVAL);
-
- /*
- * A task can always look at itself, in case it chooses
- * to use system calls instead of load instructions.
- */
- if (task == current)
- return mm;
-
- /*
- * If current is actively ptrace'ing, and would also be
- * permitted to freshly attach with ptrace now, permit it.
- */
- if (task_is_stopped_or_traced(task)) {
- int match;
- rcu_read_lock();
- match = (ptrace_parent(task) == current);
- rcu_read_unlock();
- if (match && ptrace_may_access(task, PTRACE_MODE_ATTACH))
- return mm;
- }
-
- /*
- * No one else is allowed.
- */
- mmput(mm);
- return ERR_PTR(-EPERM);
-}
-
-/*
- * If current may access user memory in @task return a reference to the
- * corresponding mm, otherwise ERR_PTR.
- */
-static struct mm_struct *check_mem_permission(struct task_struct *task)
-{
- struct mm_struct *mm;
- int err;
-
- /*
- * Avoid racing if task exec's as we might get a new mm but validate
- * against old credentials.
- */
- err = mutex_lock_killable(&task->signal->cred_guard_mutex);
- if (err)
- return ERR_PTR(err);
-
- mm = __check_mem_permission(task);
- mutex_unlock(&task->signal->cred_guard_mutex);
-
- return mm;
-}
-
-struct mm_struct *mm_for_maps(struct task_struct *task)
+static struct mm_struct *mm_access(struct task_struct *task, unsigned int mode)
{
struct mm_struct *mm;
int err;
@@ -263,7 +205,7 @@ struct mm_struct *mm_for_maps(struct tas
mm = get_task_mm(task);
if (mm && mm != current->mm &&
- !ptrace_may_access(task, PTRACE_MODE_READ)) {
+ !ptrace_may_access(task, mode)) {
mmput(mm);
mm = ERR_PTR(-EACCES);
}
@@ -272,6 +214,11 @@ struct mm_struct *mm_for_maps(struct tas
return mm;
}
+struct mm_struct *mm_for_maps(struct task_struct *task)
+{
+ return mm_access(task, PTRACE_MODE_READ);
+}
+
static int proc_pid_cmdline(struct task_struct *task, char * buffer)
{
int res = 0;
@@ -816,38 +763,39 @@ static const struct file_operations proc
static int mem_open(struct inode* inode, struct file* file)
{
- file->private_data = (void*)((long)current->self_exec_id);
+ struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+ struct mm_struct *mm;
+
+ if (!task)
+ return -ESRCH;
+
+ mm = mm_access(task, PTRACE_MODE_ATTACH);
+ put_task_struct(task);
+
+ if (IS_ERR(mm))
+ return PTR_ERR(mm);
+
/* OK to pass negative loff_t, we can catch out-of-range */
file->f_mode |= FMODE_UNSIGNED_OFFSET;
+ file->private_data = mm;
+
return 0;
}
static ssize_t mem_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
- struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+ int ret;
char *page;
unsigned long src = *ppos;
- int ret = -ESRCH;
- struct mm_struct *mm;
+ struct mm_struct *mm = file->private_data;
- if (!task)
- goto out_no_task;
+ if (!mm)
+ return 0;
- ret = -ENOMEM;
page = (char *)__get_free_page(GFP_TEMPORARY);
if (!page)
- goto out;
-
- mm = check_mem_permission(task);
- ret = PTR_ERR(mm);
- if (IS_ERR(mm))
- goto out_free;
-
- ret = -EIO;
-
- if (file->private_data != (void*)((long)current->self_exec_id))
- goto out_put;
+ return -ENOMEM;
ret = 0;
@@ -874,13 +822,7 @@ static ssize_t mem_read(struct file * fi
}
*ppos = src;
-out_put:
- mmput(mm);
-out_free:
free_page((unsigned long) page);
-out:
- put_task_struct(task);
-out_no_task:
return ret;
}
@@ -889,27 +831,15 @@ static ssize_t mem_write(struct file * f
{
int copied;
char *page;
- struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
unsigned long dst = *ppos;
- struct mm_struct *mm;
+ struct mm_struct *mm = file->private_data;
- copied = -ESRCH;
- if (!task)
- goto out_no_task;
+ if (!mm)
+ return 0;
- copied = -ENOMEM;
page = (char *)__get_free_page(GFP_TEMPORARY);
if (!page)
- goto out_task;
-
- mm = check_mem_permission(task);
- copied = PTR_ERR(mm);
- if (IS_ERR(mm))
- goto out_free;
-
- copied = -EIO;
- if (file->private_data != (void *)((long)current->self_exec_id))
- goto out_mm;
+ return -ENOMEM;
copied = 0;
while (count > 0) {
@@ -933,13 +863,7 @@ static ssize_t mem_write(struct file * f
}
*ppos = dst;
-out_mm:
- mmput(mm);
-out_free:
free_page((unsigned long) page);
-out_task:
- put_task_struct(task);
-out_no_task:
return copied;
}
@@ -959,11 +883,20 @@ loff_t mem_lseek(struct file *file, loff
return file->f_pos;
}
+static int mem_release(struct inode *inode, struct file *file)
+{
+ struct mm_struct *mm = file->private_data;
+
+ mmput(mm);
+ return 0;
+}
+
static const struct file_operations proc_mem_operations = {
.llseek = mem_lseek,
.read = mem_read,
.write = mem_write,
.open = mem_open,
+ .release = mem_release,
};
static ssize_t environ_read(struct file *file, char __user *buf,

39
debian/patches/bugfix/all/rtc-Fix-alarm-rollover-when-day-or-month-is-out-of-r.patch vendored
View File

@ -1,39 +0,0 @@
From: Ben Hutchings <ben@decadent.org.uk>
Date: Thu, 29 Dec 2011 14:38:52 +0100
Subject: [PATCH] rtc: Fix alarm rollover when day or month is out-of-range
Commit f44f7f96a20af16f6f12e1c995576d6becf5f57b ('RTC: Initialize
kernel state from RTC') introduced a potential infinite loop. If an
alarm time contains a wildcard month and an invalid day (> 31), or a
wildcard year and an invalid month (>= 12), the loop searching for the
next matching date will never terminate. Treat the invalid values as
wildcards.
References: http://bugs.debian.org/646429
References: http://bugs.debian.org/653331
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/rtc/interface.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 3d9d2b9..f79ff34 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -227,11 +227,11 @@ int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
alarm->time.tm_hour = now.tm_hour;
/* For simplicity, only support date rollover for now */
- if (alarm->time.tm_mday == -1) {
+ if (alarm->time.tm_mday < 1 || alarm->time.tm_mday > 31) {
alarm->time.tm_mday = now.tm_mday;
missing = day;
}
- if (alarm->time.tm_mon == -1) {
+ if ((unsigned)alarm->time.tm_mon >= 12) {
alarm->time.tm_mon = now.tm_mon;
if (missing == none)
missing = month;
--
1.7.7.3

6
debian/patches/series/base vendored
View File

@ -59,22 +59,16 @@
+ bugfix/all/cpu-Register-a-generic-CPU-device-on-architectures-t.patch
+ debian/x86-memtest-WARN-if-bad-RAM-found.patch
+ bugfix/all/snapshot-Implement-compat_ioctl.patch
+ bugfix/all/rtc-Fix-alarm-rollover-when-day-or-month-is-out-of-r.patch
+ bugfix/all/media-V4L-DVB-v4l2-ioctl-integer-overflow-in-video_usercopy.patch
+ debian/ARM-Remove-use-of-possibly-undefined-BUILD_BUG_ON-in.patch
+ bugfix/arm/ARM-ixp4xx-gpiolib-support.patch
+ bugfix/arm/ARM-topdown-mmap.patch
+ bugfix/alpha/alpha-add-io-read-write-16-32-be-functions.patch
+ features/arm/ARM-kirkwood-6282A1.patch
+ bugfix/all/net-reintroduce-missing-rcu_assign_pointer-calls.patch
+ bugfix/all/block-add-and-use-scsi_blk_cmd_ioctl.patch
+ bugfix/all/block-fail-SCSI-passthrough-ioctls-on-partition-devi.patch
+ bugfix/all/dm-do-not-forward-ioctls-from-logical-volumes-to-the.patch
+ features/all/Input-ALPS-move-protocol-information-to-Documentatio.patch
+ features/all/Input-ALPS-add-protocol-version-field-in-alps_model_.patch
+ features/all/Input-ALPS-remove-assumptions-about-packet-size.patch
+ features/all/Input-ALPS-add-support-for-protocol-versions-3-and-4.patch
+ features/all/Input-ALPS-add-semi-MT-support-for-v3-protocol.patch
+ bugfix/all/proc-clean-up-and-fix-proc-pid-mem-handling.patch
+ bugfix/x86/KVM-nVMX-Add-KVM_REQ_IMMEDIATE_EXIT.patch
+ bugfix/x86/KVM-nVMX-Fix-warning-causing-idt-vectoring-info-beha.patch