diff options
| author | Kees Cook <keescook@chromium.org> | 2013-07-03 22:01:14 +0000 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2014-05-19 07:53:26 +0200 |
| commit | 134cbf552295204ea9b17882580acf800b30eaff (patch) | |
| tree | 0e9f6278e7ad889924dc99c6e7e6f062ad0e33a4 | |
| parent | bc627cf07b1fa9e61cfe6b14ea27825ed100a126 (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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[jmm: Backport to 2.6.32]
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | drivers/block/nbd.c | 4 | ||||
| -rw-r--r-- | fs/partitions/check.c | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 26ada4762fa3..90550ba8347a 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -655,7 +655,9 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *lo, mutex_unlock(&lo->tx_lock); - thread = kthread_create(nbd_thread, lo, lo->disk->disk_name); + thread = kthread_create(nbd_thread, lo, "%s", + lo->disk->disk_name); + if (IS_ERR(thread)) { mutex_lock(&lo->tx_lock); return PTR_ERR(thread); diff --git a/fs/partitions/check.c b/fs/partitions/check.c index 7b685e10cbad..aa90d88118e3 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -476,7 +476,7 @@ 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); |