From: Kees Cook <keescook@chromium.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
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
Subject: Re: [GIT PULL] Fix fill_files_note
Date: Wed, 9 Mar 2022 08:32:14 -0800 [thread overview]
Message-ID: <202203090830.7E971BD6C@keescook> (raw)
In-Reply-To: <877d93dr8p.fsf@email.froward.int.ebiederm.org>
On Wed, Mar 09, 2022 at 10:29:10AM -0600, Eric W. Biederman wrote:
> Kees Cook <keescook@chromium.org> writes:
>
> > On Tue, Mar 08, 2022 at 01:35:03PM -0600, Eric W. Biederman wrote:
> >>
> >> 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.
> >
> > Sure! Can you make a signed tag for this pull?
>
> Not yet.
>
> Hopefully I will get the time to set that up soon, but I am not at all
> setup to do signed tags at this point.
Okay, cool. Since I'd already review these before, I've pulled and it
should be in -next now.
> [...]
> Thanks. That looks like a good place to start.
I will try to clean up that work-flow and stuff it into my kernel-tools
repo.
--
Kees Cook
next prev parent reply other threads:[~2022-03-09 16:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-31 15:37 [PATCH] binfmt_elf: Take the mmap lock when walking the VMA list Matthew Wilcox (Oracle)
2022-01-31 16:03 ` Eric W. Biederman
2022-01-31 16:13 ` Matthew Wilcox
2022-01-31 16:26 ` Eric W. Biederman
2022-01-31 16:35 ` Matthew Wilcox
2022-01-31 17:13 ` Jann Horn
2022-01-31 18:44 ` [PATCH 0/5] Fix fill_files_note Eric W. Biederman
2022-01-31 18:46 ` [PATCH 1/5] coredump: Move definition of struct coredump_params into coredump.h Eric W. Biederman
2022-02-01 1:54 ` kernel test robot
2022-02-01 4:07 ` kernel test robot
2022-01-31 18:46 ` [PATCH 2/5] coredump: Snapshot the vmas in do_coredump Eric W. Biederman
2022-02-01 18:32 ` Jann Horn
2022-02-02 15:41 ` Eric W. Biederman
2022-01-31 18:46 ` [PATCH 3/5] coredump: Remove the WARN_ON in dump_vma_snapshot Eric W. Biederman
2022-02-01 18:35 ` Jann Horn
2022-01-31 18:47 ` [PATCH 4/5] coredump/elf: Pass coredump_params into fill_note_info Eric W. Biederman
2022-02-01 18:40 ` Jann Horn
2022-01-31 18:47 ` [PATCH 5/5] coredump: Use the vma snapshot in fill_files_note Eric W. Biederman
2022-02-01 19:02 ` Jann Horn
2022-02-02 14:46 ` Eric W. Biederman
2022-01-31 20:57 ` [PATCH 0/5] Fix fill_files_note Kees Cook
2022-03-08 19:35 ` [GIT PULL] " Eric W. Biederman
2022-03-08 21:49 ` Kees Cook
2022-03-09 16:29 ` Eric W. Biederman
2022-03-09 16:32 ` Kees Cook [this message]
2022-03-09 20:27 ` Eric W. Biederman
2022-03-09 21:45 ` Kees Cook
2022-01-31 17:38 ` [PATCH] binfmt_elf: Take the mmap lock when walking the VMA list Eric W. Biederman
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