From: Greg KH <gregkh@linuxfoundation.org>
To: Kassey Li <quic_yingangl@quicinc.com>
Cc: gregkh@google.com, cmllamas@google.com, surenb@google.com,
arve@android.com, joel@joelfernandes.org, brauner@kernel.org,
tkjos@android.com, maco@android.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] binder: add mutex_lock for mmap and NULL when free
Date: Sat, 7 Oct 2023 08:44:27 +0200 [thread overview]
Message-ID: <2023100715-blade-valiant-714d@gregkh> (raw)
In-Reply-To: <20231007034046.2352124-1-quic_yingangl@quicinc.com>
On Sat, Oct 07, 2023 at 11:40:46AM +0800, Kassey Li wrote:
> Enforce alloc->mutex in binder_alloc_mmap_handler when add
> the entry to list.
>
> Assign the freed pages/page_ptr to NULL to catch possible
> use after free with NULL pointer access.
>
> Signed-off-by: Kassey Li <quic_yingangl@quicinc.com>
> ---
> drivers/android/binder_alloc.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
What commit id does this fix?
thanks,
greg k-h
next prev parent reply other threads:[~2023-10-07 6:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-07 3:40 [PATCH] binder: add mutex_lock for mmap and NULL when free Kassey Li
2023-10-07 6:44 ` Greg KH [this message]
2023-10-07 11:07 ` Kassey Li
2023-10-07 11:18 ` Greg KH
2023-10-07 11:34 ` Kassey Li
2023-10-07 11:37 ` Greg KH
2023-10-07 11:43 ` Kassey Li
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