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| author | Vinod Koul <vinod.koul@intel.com> | 2016-02-03 12:29:44 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-02-04 11:36:14 (GMT) |
| commit | 41556f68d1dd0b6bbf311a220523b034d2a040e7 (patch) | |
| tree | 4a9a5c0c3ba379e4c755b814ecfbb112d40ab2f9 /sound/soc | |
| parent | 292d4200a90715ac29f3763df27adb38a243868c (diff) | |
| download | linux-41556f68d1dd0b6bbf311a220523b034d2a040e7.tar.xz | |
ASoC: Intel: Skylake: Fix the memory overwrite of tlv buffer
TLV buffer can be smaller than the module data, so update the
size of data to be copied before doing the copy.
Also TLV header consists of two unsigned ints, this is also taken
into account here and size modified to reflect this
Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/intel/skylake/skl-topology.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c index c7816d5..c67e3ac 100644 --- a/sound/soc/intel/skylake/skl-topology.c +++ b/sound/soc/intel/skylake/skl-topology.c @@ -916,6 +916,13 @@ static int skl_tplg_tlv_control_get(struct snd_kcontrol *kcontrol, skl_get_module_params(skl->skl_sst, (u32 *)bc->params, bc->max, bc->param_id, mconfig); + /* decrement size for TLV header */ + size -= 2 * sizeof(u32); + + /* check size as we don't want to send kernel data */ + if (size > bc->max) + size = bc->max; + if (bc->params) { if (copy_to_user(data, &bc->param_id, sizeof(u32))) return -EFAULT; |