diff options
| author | Young_X <YangX92@hotmail.com> | 2018-10-03 12:54:29 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-21 09:25:57 +0100 |
| commit | 8dd745a8799ee01fc67b64fd33cdb44d04eb7e4c (patch) | |
| tree | 18503e6607db2f415a3abdcb6ea9218a547af2e4 /drivers/cdrom | |
| parent | 0cf4fa79920cfdff86e2ebef7aadd5a6e3b09b92 (diff) | |
cdrom: fix improper type cast, which can leat to information leak.
commit e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276 upstream.
There is another cast from unsigned long to int which causes
a bounds check to fail with specially crafted input. The value is
then used as an index in the slot array in cdrom_slot_status().
This issue is similar to CVE-2018-16658 and CVE-2018-10940.
Signed-off-by: Young_X <YangX92@hotmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/cdrom')
| -rw-r--r-- | drivers/cdrom/cdrom.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index 987e8f503522..ff4280800cd0 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -2435,7 +2435,7 @@ static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, return -ENOSYS; if (arg != CDSL_CURRENT && arg != CDSL_NONE) { - if ((int)arg >= cdi->capacity) + if (arg >= cdi->capacity) return -EINVAL; } |