diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-07-16 16:30:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-06 19:08:12 +0200 |
| commit | c6ec03306ca05e3cae9ad92df6c693f95f2fc8ec (patch) | |
| tree | ee8b2a3e3b1746f0cdd7e4a78a95fa3ce64a9243 /drivers | |
| parent | 4efe530bc3101b7edb24cb2cfe5e8e41a8bdaaf5 (diff) | |
drivers/rapidio/devices/rio_mport_cdev.c: NUL terminate some strings
[ Upstream commit 156e0b1a8112b76e351684ac948c59757037ac36 ]
The dev_info.name[] array has space for RIO_MAX_DEVNAME_SZ + 1
characters. But the problem here is that we don't ensure that the user
put a NUL terminator on the end of the string. It could lead to an out
of bounds read.
Link: http://lkml.kernel.org/r/20190529110601.GB19119@mwanda
Fixes: e8de370188d0 ("rapidio: add mport char device driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rapidio/devices/rio_mport_cdev.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index ce7a90e68042..8155f59ece38 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -1686,6 +1686,7 @@ static int rio_mport_add_riodev(struct mport_cdev_priv *priv, if (copy_from_user(&dev_info, arg, sizeof(dev_info))) return -EFAULT; + dev_info.name[sizeof(dev_info.name) - 1] = '\0'; rmcd_debug(RDEV, "name:%s ct:0x%x did:0x%x hc:0x%x", dev_info.name, dev_info.comptag, dev_info.destid, dev_info.hopcount); @@ -1817,6 +1818,7 @@ static int rio_mport_del_riodev(struct mport_cdev_priv *priv, void __user *arg) if (copy_from_user(&dev_info, arg, sizeof(dev_info))) return -EFAULT; + dev_info.name[sizeof(dev_info.name) - 1] = '\0'; mport = priv->md->mport; |