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| author | Lin Ma <linma@zju.edu.cn> | 2022-05-16 17:20:35 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-05-16 12:58:42 +0100 |
| commit | 2def44d3aec59e38d2701c568d65540783f90f2f (patch) | |
| tree | a546f9890b6df2f9dd488998941fe32944a96e56 /sound/soc | |
| parent | 232213bd73bbb381b05b729829fdb5d00e0a8fdf (diff) | |
| download | linux-2def44d3aec59e38d2701c568d65540783f90f2f.tar.gz linux-2def44d3aec59e38d2701c568d65540783f90f2f.tar.bz2 linux-2def44d3aec59e38d2701c568d65540783f90f2f.zip | |
ASoC: rt5645: Fix errorenous cleanup order
There is a logic error when removing rt5645 device as the function
rt5645_i2c_remove() first cancel the &rt5645->jack_detect_work and
delete the &rt5645->btn_check_timer latter. However, since the timer
handler rt5645_btn_check_callback() will re-queue the jack_detect_work,
this cleanup order is buggy.
That is, once the del_timer_sync in rt5645_i2c_remove is concurrently
run with the rt5645_btn_check_callback, the canceled jack_detect_work
will be rescheduled again, leading to possible use-after-free.
This patch fix the issue by placing the del_timer_sync function before
the cancel_delayed_work_sync.
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Link: https://lore.kernel.org/r/20220516092035.28283-1-linma@zju.edu.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/codecs/rt5645.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c index ccdea234a3ba..507aba8de3cc 100644 --- a/sound/soc/codecs/rt5645.c +++ b/sound/soc/codecs/rt5645.c @@ -4153,9 +4153,14 @@ static int rt5645_i2c_remove(struct i2c_client *i2c) if (i2c->irq) free_irq(i2c->irq, rt5645); + /* + * Since the rt5645_btn_check_callback() can queue jack_detect_work, + * the timer need to be delted first + */ + del_timer_sync(&rt5645->btn_check_timer); + cancel_delayed_work_sync(&rt5645->jack_detect_work); cancel_delayed_work_sync(&rt5645->rcclock_work); - del_timer_sync(&rt5645->btn_check_timer); regulator_bulk_disable(ARRAY_SIZE(rt5645->supplies), rt5645->supplies); |