tree 672f649422ea99bd769d871aa03f7d476b23a087
parent 8e699d2cc286506c00ce8ecc67c3d7d6cca9e814
author Dan Carpenter <dan.carpenter@oracle.com> 1316759061 +0300
committer Takashi Iwai <tiwai@suse.de> 1316759336 +0200

ALSA: hdspm - potential info leak in snd_hdspm_hwdep_ioctl()

Smatch has a new check for Rosenberg type information leaks where
structs are copied to the user with uninitialized stack data in them.

The status struct has a hole in it, and on some paths not all the
members were initialized.

struct hdspm_status {
        unsigned char              card_type;            /*     0     1 */
        /* XXX 3 bytes hole, try to pack */
        enum hdspm_syncsource      autosync_source;      /*     4     4 */
        long long unsigned int     card_clock;           /*     8     8 */

The hdspm_version struct had holes in it as well.

struct hdspm_version {
        unsigned char              card_type;            /*     0     1 */
        char                       cardname[20];         /*     1    20 */
        /* XXX 3 bytes hole, try to pack */
        unsigned int               serial;               /*    24     4 */
        short unsigned int         firmware_rev;         /*    28     2 */
        /* XXX 2 bytes hole, try to pack */
        int                        addons;               /*    32     4 */

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>