6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gergo Koteles <soyer@xxxxxx>
commit f32c80d34249e1cfb2e647ab3c8ef38a460c787f upstream.
Add additional checks for program/config numbers to avoid loading from
invalid addresses.
If prm_no/cfg_no is negative, skip uploading program/config.
The tas2781-hda driver caused a NULL pointer dereference after loading
module, and before first runtime_suspend.
the state was:
tas_priv->cur_conf = -1;
tas_priv->tasdevice[i].cur_conf = 0;
program = &(tas_fmw->programs[-1]);
BUG: kernel NULL pointer dereference, address: 0000000000000010
Call Trace:
<TASK>
? __die+0x23/0x70
? page_fault_oops+0x171/0x4e0
? vprintk_emit+0x175/0x2b0
? exc_page_fault+0x7f/0x180
? asm_exc_page_fault+0x26/0x30
? tasdevice_load_block_kernel+0x21/0x310 [snd_soc_tas2781_fmwlib]
tasdevice_select_tuningprm_cfg+0x268/0x3a0 [snd_soc_tas2781_fmwlib]
tasdevice_tuning_switch+0x69/0x710 [snd_soc_tas2781_fmwlib]
tas2781_hda_playback_hook+0xd4/0x110 [snd_hda_scodec_tas2781_i2c]
Fixes: 915f5eadebd2 ("ASoC: tas2781: firmware lib")
CC: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Gergo Koteles <soyer@xxxxxx>
Link: https://msgid.link/r/523780155bfdca9bc0acd39efc79ed039454818d.1702591356.git.soyer@xxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/tas2781-fmwlib.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/sound/soc/codecs/tas2781-fmwlib.c
+++ b/sound/soc/codecs/tas2781-fmwlib.c
@@ -2219,11 +2219,11 @@ int tasdevice_select_tuningprm_cfg(void
goto out;
}
- conf = &(tas_fmw->configs[cfg_no]);
for (i = 0, prog_status = 0; i < tas_priv->ndev; i++) {
if (cfg_info[rca_conf_no]->active_dev & (1 << i)) {
- if (tas_priv->tasdevice[i].cur_prog != prm_no
- || tas_priv->force_fwload_status) {
+ if (prm_no >= 0
+ && (tas_priv->tasdevice[i].cur_prog != prm_no
+ || tas_priv->force_fwload_status)) {
tas_priv->tasdevice[i].cur_conf = -1;
tas_priv->tasdevice[i].is_loading = true;
prog_status++;
@@ -2258,7 +2258,8 @@ int tasdevice_select_tuningprm_cfg(void
}
for (i = 0, status = 0; i < tas_priv->ndev; i++) {
- if (tas_priv->tasdevice[i].cur_conf != cfg_no
+ if (cfg_no >= 0
+ && tas_priv->tasdevice[i].cur_conf != cfg_no
&& (cfg_info[rca_conf_no]->active_dev & (1 << i))
&& (tas_priv->tasdevice[i].is_loaderr == false)) {
status++;
@@ -2268,6 +2269,7 @@ int tasdevice_select_tuningprm_cfg(void
}
if (status) {
+ conf = &(tas_fmw->configs[cfg_no]);
status = 0;
tasdevice_load_data(tas_priv, &(conf->dev_data));
for (i = 0; i < tas_priv->ndev; i++) {
@@ -2311,7 +2313,7 @@ int tasdevice_prmg_load(void *context, i
}
for (i = 0, prog_status = 0; i < tas_priv->ndev; i++) {
- if (tas_priv->tasdevice[i].cur_prog != prm_no) {
+ if (prm_no >= 0 && tas_priv->tasdevice[i].cur_prog != prm_no) {
tas_priv->tasdevice[i].cur_conf = -1;
tas_priv->tasdevice[i].is_loading = true;
prog_status++;
@@ -2356,7 +2358,7 @@ int tasdevice_prmg_calibdata_load(void *
}
for (i = 0, prog_status = 0; i < tas_priv->ndev; i++) {
- if (tas_priv->tasdevice[i].cur_prog != prm_no) {
+ if (prm_no >= 0 && tas_priv->tasdevice[i].cur_prog != prm_no) {
tas_priv->tasdevice[i].cur_conf = -1;
tas_priv->tasdevice[i].is_loading = true;
prog_status++;
