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| author | Arve Hjønnevåg <arve@android.com> | 2016-10-24 15:20:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-24 19:37:48 +0200 |
| commit | 4afb604e2d14d429ac9e1fd84b952602853b2df5 (patch) | |
| tree | 6aaa0748e70061782de8c96839d3d9477179e92f | |
| parent | 0a3ffab93fe52530602fe47cd74802cffdb19c05 (diff) | |
| download | linux-4afb604e2d14d429ac9e1fd84b952602853b2df5.tar.gz | |
ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct
Prevents leaking pointers between processes Signed-off-by: Arve Hjønnevåg <arve@android.com> Signed-off-by: Martijn Coenen <maco@android.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/android/binder.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 3681759c22d7..3c71b982bf2a 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -1584,7 +1584,9 @@ static void binder_transaction(struct binder_proc *proc, fp->type = BINDER_TYPE_HANDLE; else fp->type = BINDER_TYPE_WEAK_HANDLE; + fp->binder = 0; fp->handle = ref->desc; + fp->cookie = 0; binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE, &thread->todo); @@ -1634,7 +1636,9 @@ static void binder_transaction(struct binder_proc *proc, return_error = BR_FAILED_REPLY; goto err_binder_get_ref_for_node_failed; } + fp->binder = 0; fp->handle = new_ref->desc; + fp->cookie = 0; binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL); trace_binder_transaction_ref_to_ref(t, ref, new_ref); @@ -1688,6 +1692,7 @@ static void binder_transaction(struct binder_proc *proc, binder_debug(BINDER_DEBUG_TRANSACTION, " fd %d -> %d\n", fp->handle, target_fd); /* TODO: fput? */ + fp->binder = 0; fp->handle = target_fd; } break; |