diff options
| author | Kees Cook <keescook@chromium.org> | 2013-07-03 15:01:14 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-13 11:03:41 -0700 |
| commit | a8139b5b8b1355c4909d90afa58b055aabe1a272 (patch) | |
| tree | 6c454bbd3770b399a90b08396926d68135330f8c | |
| parent | 5f855daf6487b64eae1f201483b5830f42b2e9bb (diff) | |
block: do not pass disk names as format strings
commit ffc8b30866879ed9ba62bd0a86fecdbd51cd3d19 upstream.
Disk names may contain arbitrary strings, so they must not be
interpreted as format strings. It seems that only md allows arbitrary
strings to be used for disk names, but this could allow for a local
memory corruption from uid 0 into ring 0.
CVE-2013-2851
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | block/genhd.c | 2 | ||||
| -rw-r--r-- | drivers/block/nbd.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/osd/osd_uld.c | 2 |
3 files changed, 4 insertions, 3 deletions
diff --git a/block/genhd.c b/block/genhd.c index 60108d9fa04f..d815a0fb52dd 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -518,7 +518,7 @@ static void register_disk(struct gendisk *disk) ddev->parent = disk->driverfs_dev; - dev_set_name(ddev, disk->disk_name); + dev_set_name(ddev, "%s", disk->disk_name); /* delay uevents, until we scanned partition table */ dev_set_uevent_suppress(ddev, 1); diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 3c4c225d1981..386d40e3cf48 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -666,7 +666,8 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, mutex_unlock(&nbd->tx_lock); - thread = kthread_create(nbd_thread, nbd, nbd->disk->disk_name); + thread = kthread_create(nbd_thread, nbd, "%s", + nbd->disk->disk_name); if (IS_ERR(thread)) { mutex_lock(&nbd->tx_lock); return PTR_ERR(thread); diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c index d4ed9eb52657..caac1b28465a 100644 --- a/drivers/scsi/osd/osd_uld.c +++ b/drivers/scsi/osd/osd_uld.c @@ -465,7 +465,7 @@ static int osd_probe(struct device *dev) oud->class_dev.class = &osd_uld_class; oud->class_dev.parent = dev; oud->class_dev.release = __remove; - error = dev_set_name(&oud->class_dev, disk->disk_name); + error = dev_set_name(&oud->class_dev, "%s", disk->disk_name); if (error) { OSD_ERR("dev_set_name failed => %d\n", error); goto err_put_cdev; |