linux-kernel - Re: [PATCH] binder: fix UAF of alloc->vma in race with munmap()

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Message-ID: <ZGi+ltbOgQcJEq58@google.com>
Date:   Sat, 20 May 2023 12:35:34 +0000
From:   Carlos Llamas <cmllamas@...gle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <brauner@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Michal Hocko <mhocko@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, kernel-team@...roid.com,
        Jann Horn <jannh@...gle.com>, stable@...r.kernel.org,
        Minchan Kim <minchan@...nel.org>,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        Liam Howlett <liam.howlett@...cle.com>,
        Todd Kjos <tkjos@...gle.com>
Subject: Re: [PATCH] binder: fix UAF of alloc->vma in race with munmap()

On Sat, May 20, 2023 at 10:54:15AM +0100, Greg Kroah-Hartman wrote:
> On Fri, May 19, 2023 at 07:59:49PM +0000, Carlos Llamas wrote:
> > [ cmllamas: clean forward port from commit 015ac18be7de ("binder: fix
> >   UAF of alloc->vma in race with munmap()") in 5.10 stable. It is needed
> >   in mainline after the revert of commit a43cfc87caaf ("android: binder:
> >   stop saving a pointer to the VMA") as pointed out by Liam. The commit
> >   log and tags have been tweaked to reflect this. ]
> 
> I'm confused, is this for a stable release (and if so, which one), or is
> this for Linus's tree?

Sorry for the confusion. This is for Linus's tree.