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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2020-02-05 15:32:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 15:42:54 +0100 |
| commit | 5865db7b77abf87dd66efd726cc53313a6cfca7b (patch) | |
| tree | 8207996b91b862ae290d5ed29dc8fbd620fa60e6 /drivers/staging | |
| parent | f7a3c4736d98e683833cee39b7854f609e611c7e (diff) | |
staging: greybus: use after free in gb_audio_manager_remove_all()
commit b7db58105b80fa9232719c8329b995b3addfab55 upstream.
When we call kobject_put() and it's the last reference to the kobject
then it calls gb_audio_module_release() and frees module. We dereference
"module" on the next line which is a use after free.
Fixes: c77f85bbc91a ("greybus: audio: Fix incorrect counting of 'ida'")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Link: https://lore.kernel.org/r/20200205123217.jreendkyxulqsool@kili.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/greybus/audio_manager.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/greybus/audio_manager.c b/drivers/staging/greybus/audio_manager.c index aa6508b44fab..ed7c32542cb3 100644 --- a/drivers/staging/greybus/audio_manager.c +++ b/drivers/staging/greybus/audio_manager.c @@ -90,8 +90,8 @@ void gb_audio_manager_remove_all(void) list_for_each_entry_safe(module, next, &modules_list, list) { list_del(&module->list); - kobject_put(&module->kobj); ida_simple_remove(&module_id, module->id); + kobject_put(&module->kobj); } is_empty = list_empty(&modules_list); |