diff options
author | Cong Wang <amwang@redhat.com> | 2013-06-07 10:07:28 +1000 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-06-17 18:14:59 +1000 |
commit | 245e7b514e5d4f6842885e4c86bbf6f51c5157fe (patch) | |
tree | 658626528a2768db06147ef0750b7febe6e6c471 /block | |
parent | 65a8f712f31879aa5da96dc741516cd0559a13ec (diff) |
block/compat_ioctl.c: do not leak info to user-space
There is a hole in struct hd_geometry, so we have to zero the struct on
stack before copying it to user-space.
Signed-off-by: Cong Wang <amwang@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'block')
-rw-r--r-- | block/compat_ioctl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index 7c668c8a6f95..7e5d474dc6ba 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -59,6 +59,7 @@ static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, if (!disk->fops->getgeo) return -ENOTTY; + memset(&geo, 0, sizeof(geo)); /* * We need to set the startsect first, the driver may * want to override it. |