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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 2/7] android/binder: use same_thread_group(proc->tsk, current) in binder_mmap() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" With or without this change the checked condition can be falsely true if proc->tsk execs, but this is fine: binder_alloc_mmap_handler() checks vma->vm_mm =3D=3D alloc->mm. Signed-off-by: Oleg Nesterov Reviewed-by: Alice Ryhl --- drivers/android/binder.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index a00f6678f04d..980bb13228fc 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -6013,7 +6013,7 @@ static int binder_mmap(struct file *filp, struct vm_a= rea_struct *vma) { struct binder_proc *proc =3D filp->private_data; =20 - if (proc->tsk !=3D current->group_leader) + if (!same_thread_group(proc->tsk, current)) return -EINVAL; =20 binder_debug(BINDER_DEBUG_OPEN_CLOSE, --=20 2.52.0