diff options
| author | Kees Cook <keescook@chromium.org> | 2013-07-03 15:01:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:07:25 -0700 |
| commit | ffc8b30866879ed9ba62bd0a86fecdbd51cd3d19 (patch) | |
| tree | 21fdc09c7011ed9a1b85e98f7718a58a2c903d32 /block/genhd.c | |
| parent | 542db01579fbb7ea7d1f7bb9ddcef1559df660b2 (diff) | |
| download | lwn-ffc8b30866879ed9ba62bd0a86fecdbd51cd3d19.tar.gz lwn-ffc8b30866879ed9ba62bd0a86fecdbd51cd3d19.zip | |
block: do not pass disk names as format strings
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>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/genhd.c b/block/genhd.c index e9094b375c05..dadf42b454a3 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -512,7 +512,7 @@ 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); |