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/openbmc/linux/include/sound/
H A Dsoc.hdiff dd9f9cc1e6b9391140afa5cf27bb47c9e2a08d02 Fri Sep 29 05:32:43 CDT 2023 Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> ASoC: core: Do not call link_exit() on uninitialized rtd objects

On init we have sequence:

for_each_card_prelinks(card, i, dai_link) {
ret = snd_soc_add_pcm_runtime(card, dai_link);

ret = init_some_other_things(...);
if (ret)
goto probe_end:

for_each_card_rtds(card, rtd) {
ret = soc_init_pcm_runtime(card, rtd);

probe_end:

while on exit:
for_each_card_rtds(card, rtd)
snd_soc_link_exit(rtd);

If init_some_other_things() step fails due to error we end up with
not fully setup rtds and try to call snd_soc_link_exit on them, which
depending on contents on .link_exit handler, can end up dereferencing
NULL pointer.

Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20230929103243.705433-2-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
/openbmc/linux/sound/soc/
H A Dsoc-core.cdiff dd9f9cc1e6b9391140afa5cf27bb47c9e2a08d02 Fri Sep 29 05:32:43 CDT 2023 Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> ASoC: core: Do not call link_exit() on uninitialized rtd objects

On init we have sequence:

for_each_card_prelinks(card, i, dai_link) {
ret = snd_soc_add_pcm_runtime(card, dai_link);

ret = init_some_other_things(...);
if (ret)
goto probe_end:

for_each_card_rtds(card, rtd) {
ret = soc_init_pcm_runtime(card, rtd);

probe_end:

while on exit:
for_each_card_rtds(card, rtd)
snd_soc_link_exit(rtd);

If init_some_other_things() step fails due to error we end up with
not fully setup rtds and try to call snd_soc_link_exit on them, which
depending on contents on .link_exit handler, can end up dereferencing
NULL pointer.

Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20230929103243.705433-2-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>