linux-kernel - Re: [PATCH] Re: KASAN: use-after-free Read in path

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Message-ID: <CAHk-=wgHZF+GbPS0=+9C7NWb1QUw4sPKL0t90yPGs07jJ0eczQ@mail.gmail.com>
Date:   Tue, 11 Aug 2020 21:29:47 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Christoph Hellwig <hch@....de>,
        Linux API <linux-api@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        syzbot <syzbot+bbeb1c88016c7db4aa24@...kaller.appspotmail.com>
Subject: Re: [PATCH] Re: KASAN: use-after-free Read in path_init (2)

On Tue, Aug 11, 2020 at 9:15 PM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> fix breakage in do_rmdir()
>
> putname() should happen only after we'd *not* branched to
> retry, same as it's done in do_unlinkat().

Looks obviously correct.

Do you want me to apply directly, or do you have other fixes pending
and I'll get a pull request?

                  Linus