diff options
| author | Jann Horn <jannh@google.com> | 2020-08-06 18:53:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-29 09:57:37 +0100 |
| commit | 2b150aa2e3ef864df904acceb976d688d7ea19a6 (patch) | |
| tree | e3862ffcf383aa56128afbf6fe97587bf7510e51 /drivers/android | |
| parent | 48c121a74fb62a9dd7d4f2be46f14f68cc5b9caa (diff) | |
binder: Remove bogus warning on failed same-process transaction
[ Upstream commit e8b8ae7ce32e17a5c29f0289e9e2a39c7dcaa1b8 ]
While binder transactions with the same binder_proc as sender and recipient
are forbidden, transactions with the same task_struct as sender and
recipient are possible (even though currently there is a weird check in
binder_transaction() that rejects them in the target==0 case).
Therefore, task_struct identities can't be used to distinguish whether
the caller is running in the context of the sender or the recipient.
Since I see no easy way to make this WARN_ON() useful and correct, let's
just remove it.
Fixes: 44d8047f1d87 ("binder: use standard functions to allocate fds")
Reported-by: syzbot+e113a0b970b7b3f394ba@syzkaller.appspotmail.com
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Jann Horn <jannh@google.com>
Link: https://lore.kernel.org/r/20200806165359.2381483-1-jannh@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/android')
| -rw-r--r-- | drivers/android/binder.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 0f56a8261538..b62b1ab6bb69 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2326,8 +2326,6 @@ static void binder_transaction_buffer_release(struct binder_proc *proc, * file is done when the transaction is torn * down. */ - WARN_ON(failed_at && - proc->tsk == current->group_leader); } break; case BINDER_TYPE_PTR: /* |