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From:   "Eric W. Biederman" <ebiederm@xmission.com>
To:     Kees Cook <keescook@chromium.org>
Cc:     Matthew Wilcox <willy@infradead.org>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Denys Vlasenko <vda.linux@googlemail.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        "Liam R . Howlett" <liam.howlett@oracle.com>,
        Jann Horn <jannh@google.com>, <linux-mm@kvack.org>
References: <20220131153740.2396974-1-willy@infradead.org>
        <871r0nriy4.fsf@email.froward.int.ebiederm.org>
        <YfgKw5z2uswzMVRQ@casper.infradead.org>
        <877dafq3bw.fsf@email.froward.int.ebiederm.org>
        <YfgPwPvopO1aqcVC@casper.infradead.org>
        <CAG48ez3MCs8d8hjBfRSQxwUTW3o64iaSwxF=UEVtk+SEme0chQ@mail.gmail.com>
        <87bkzroica.fsf_-_@email.froward.int.ebiederm.org>
Date:   Tue, 08 Mar 2022 13:35:03 -0600
In-Reply-To: <87bkzroica.fsf_-_@email.froward.int.ebiederm.org> (Eric
        W. Biederman's message of "Mon, 31 Jan 2022 12:44:53 -0600")
Message-ID: <87h788fdaw.fsf_-_@email.froward.int.ebiederm.org>
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Subject: [GIT PULL] Fix fill_files_note
Precedence: bulk


Kees,

Please pull the coredump-vma-snapshot-fix branch from the git tree:

  git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git coredump-vma-snapshot-fix

  HEAD: 390031c942116d4733310f0684beb8db19885fe6 coredump: Use the vma snapshot in fill_files_note

Matthew Wilcox has reported that a missing mmap_lock in file_files_note,
which could cause trouble.

Refactor the code and clean it up so that the vma snapshot makes
it to fill_files_note, and then use the vma snapshot in fill_files_note.

Eric W. Biederman (5):
      coredump: Move definition of struct coredump_params into coredump.h
      coredump: Snapshot the vmas in do_coredump
      coredump: Remove the WARN_ON in dump_vma_snapshot
      coredump/elf: Pass coredump_params into fill_note_info
      coredump: Use the vma snapshot in fill_files_note

 fs/binfmt_elf.c          | 66 ++++++++++++++++++++++--------------------------
 fs/binfmt_elf_fdpic.c    | 18 +++++--------
 fs/binfmt_flat.c         |  1 +
 fs/coredump.c            | 59 ++++++++++++++++++++++++++++---------------
 include/linux/binfmts.h  | 13 +---------
 include/linux/coredump.h | 20 ++++++++++++---
 6 files changed, 93 insertions(+), 84 deletions(-)

---

Kees I realized I needed to rebase this on Jann Horn's commit
84158b7f6a06 ("coredump: Also dump first pages of non-executable ELF
libraries").  Unfortunately before I got that done I got distracted and
these changes have been sitting in limbo for most of the development
cycle.  Since you are running a tree that is including changes like this
including Jann's can you please pull these changes into your tree.

Thank you,
Eric