From: Gergo Koteles soyer@irl.hu
stable inclusion from stable-v6.6.9 commit 9c7560192619eb9c7f3204ff15e03dce0a73d15d category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8SU2D
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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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@vger.kernel.org Signed-off-by: Gergo Koteles soyer@irl.hu Link: https://msgid.link/r/523780155bfdca9bc0acd39efc79ed039454818d.1702591356.git... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- sound/soc/codecs/tas2781-fmwlib.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/sound/soc/codecs/tas2781-fmwlib.c b/sound/soc/codecs/tas2781-fmwlib.c index eb55abae0d7b..1dfac9b2fca2 100644 --- a/sound/soc/codecs/tas2781-fmwlib.c +++ b/sound/soc/codecs/tas2781-fmwlib.c @@ -2219,11 +2219,11 @@ int tasdevice_select_tuningprm_cfg(void *context, int prm_no, 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 *context, int prm_no, }
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 *context, int prm_no, }
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, int prm_no) }
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 *context, int prm_no) }
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++;