From: 'Greg KH' <gregkh@linuxfoundation.org>
To: David Laight <David.Laight@aculab.com>
Cc: 'David Hildenbrand' <david@redhat.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Nick Desaulniers <ndesaulniers@google.com>,
Christoph Hellwig <hch@lst.de>,
"kernel-team@android.com" <kernel-team@android.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, Arnd Bergmann <arnd@arndb.de>,
David Howells <dhowells@redhat.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mips@vger.kernel.org" <linux-mips@vger.kernel.org>,
"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-aio@kvack.org" <linux-aio@kvack.org>,
"io-uring@vger.kernel.org" <io-uring@vger.kernel.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"keyrings@vger.kernel.org" <keyrings@vger.kernel.org>,
"linux-security-module@vger.kernel.org"
<linux-security-module@vger.kernel.org>
Subject: Re: Buggy commit tracked to: "Re: [PATCH 2/9] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c"
Date: Mon, 2 Nov 2020 14:52:02 +0100 [thread overview]
Message-ID: <20201102135202.GA1016272@kroah.com> (raw)
In-Reply-To: <0ab5ac71f28d459db2f350c2e07b88ca@AcuMS.aculab.com>
On Mon, Nov 02, 2020 at 09:06:38AM +0000, David Laight wrote:
> From: 'Greg KH'
> > Sent: 23 October 2020 15:47
> >
> > On Fri, Oct 23, 2020 at 02:39:24PM +0000, David Laight wrote:
> > > From: David Hildenbrand
> > > > Sent: 23 October 2020 15:33
> > > ...
> > > > I just checked against upstream code generated by clang 10 and it
> > > > properly discards the upper 32bit via a mov w23 w2.
> > > >
> > > > So at least clang 10 indeed properly assumes we could have garbage and
> > > > masks it off.
> > > >
> > > > Maybe the issue is somewhere else, unrelated to nr_pages ... or clang 11
> > > > behaves differently.
> > >
> > > We'll need the disassembly from a failing kernel image.
> > > It isn't that big to hand annotate.
> >
> > I've worked around the merge at the moment in the android tree, but it
> > is still quite reproducable, and will try to get a .o file to
> > disassemble on Monday or so...
>
> Did this get properly resolved?
For some reason, 5.10-rc2 fixed all of this up. I backed out all of the
patches I had to revert to get 5.10-rc1 to work properly, and then did
the merge and all is well.
It must have been something to do with the compat changes in this same
area that went in after 5.10-rc1, and something got reorganized in the
files somehow. I really do not know, and at the moment, don't have the
time to track it down anymore. So for now, I'd say it's all good, sorry
for the noise.
greg k-h
next prev parent reply other threads:[~2020-11-02 13:51 UTC|newest]
Thread overview: 184+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-18 12:45 let import_iovec deal with compat_iovecs as well Christoph Hellwig
2020-09-18 12:45 ` [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag Christoph Hellwig
2020-09-18 13:40 ` Al Viro
2020-09-18 13:44 ` Christoph Hellwig
2020-09-18 13:58 ` Al Viro
2020-09-18 15:16 ` Christoph Hellwig
2020-09-19 16:21 ` Andy Lutomirski
2020-09-19 21:16 ` Arnd Bergmann
2020-09-19 21:52 ` Finn Thain
2020-09-19 22:22 ` Andy Lutomirski
2020-09-21 16:10 ` Pavel Begunkov
2020-09-21 16:13 ` Pavel Begunkov
2020-09-21 23:51 ` Andy Lutomirski
2020-09-22 0:22 ` Pavel Begunkov
2020-09-22 0:58 ` Andy Lutomirski
2020-09-22 6:30 ` Pavel Begunkov
2020-09-22 7:23 ` Arnd Bergmann
2020-09-22 7:57 ` Pavel Begunkov
2020-09-22 9:01 ` Arnd Bergmann
2020-09-22 16:20 ` Andy Lutomirski
2020-09-23 8:01 ` Pavel Begunkov
2020-09-23 13:22 ` Al Viro
2020-09-19 22:09 ` Al Viro
2020-09-19 22:23 ` Andy Lutomirski
2020-09-19 22:41 ` Al Viro
2020-09-19 22:53 ` Andy Lutomirski
2020-09-19 23:24 ` Al Viro
2020-09-20 0:14 ` Andy Lutomirski
2020-09-20 2:57 ` Al Viro
2020-09-20 16:59 ` Andy Lutomirski
2020-09-20 18:12 ` Al Viro
2020-09-20 13:55 ` Arnd Bergmann
2020-09-20 15:02 ` Al Viro
2020-09-19 14:53 ` David Laight
2020-09-18 13:59 ` Arnd Bergmann
2020-09-20 15:15 ` Matthew Wilcox
2020-09-20 15:55 ` William Kucharski
2020-09-21 16:20 ` Pavel Begunkov
2020-09-20 16:00 ` Arnd Bergmann
2020-09-20 18:07 ` Al Viro
2020-09-20 18:41 ` Al Viro
2020-09-20 19:01 ` Matthew Wilcox
2020-09-20 19:10 ` Al Viro
2020-09-20 19:22 ` Matthew Wilcox
2020-09-20 19:28 ` Andy Lutomirski
2020-09-20 20:49 ` Arnd Bergmann
2020-09-20 21:13 ` David Laight
2020-09-21 16:31 ` Pavel Begunkov
2020-09-20 21:42 ` Al Viro
2020-09-21 16:26 ` Pavel Begunkov
2020-09-20 19:14 ` Andy Lutomirski
2020-09-21 4:28 ` Christoph Hellwig
2020-09-18 12:45 ` [PATCH 2/9] compat.h: fix a spelling error in <linux/compat.h> Christoph Hellwig
2020-09-18 13:37 ` Johannes Thumshirn
2020-09-18 12:45 ` [PATCH 3/9] fs: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector Christoph Hellwig
2020-09-18 12:56 ` Matthew Wilcox
2020-09-18 13:39 ` Johannes Thumshirn
2020-09-18 12:45 ` [PATCH 4/9] fs: handle the compat case in import_iovec Christoph Hellwig
2020-09-18 12:45 ` [PATCH 5/9] fs: remove various compat readv/writev helpers Christoph Hellwig
2020-09-18 12:45 ` [PATCH 6/9] fs: remove the compat readv/writev syscalls Christoph Hellwig
2020-09-18 12:45 ` [PATCH 7/9] fs: remove compat_sys_vmsplice Christoph Hellwig
2020-09-18 12:45 ` [PATCH 8/9] mm: remove compat_process_vm_{readv,writev} Christoph Hellwig
2020-09-18 13:48 ` Arnd Bergmann
2020-09-18 12:45 ` [PATCH 9/9] security/keys: remove compat_keyctl_instantiate_key_iov Christoph Hellwig
2020-09-19 14:24 ` let import_iovec deal with compat_iovecs as well David Laight
2020-09-21 4:41 ` 'Christoph Hellwig'
2020-09-21 11:11 ` David Laight
2020-09-21 14:34 ` let import_iovec deal with compat_iovecs as well v2 Christoph Hellwig
2020-09-21 14:34 ` [PATCH 01/11] compat.h: fix a spelling error in <linux/compat.h> Christoph Hellwig
2020-09-21 14:34 ` [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() Christoph Hellwig
2020-09-21 14:48 ` Matthew Wilcox
2020-09-21 15:02 ` Al Viro
2020-09-21 15:21 ` David Laight
2020-09-21 15:29 ` Al Viro
2020-09-21 15:44 ` David Laight
2020-09-21 16:27 ` Al Viro
2020-09-21 16:12 ` Christoph Hellwig
2020-09-21 14:34 ` [PATCH 03/11] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c and mark it static Christoph Hellwig
2020-09-21 14:34 ` [PATCH 04/11] iov_iter: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector Christoph Hellwig
2020-09-21 15:05 ` David Laight
2020-09-21 15:11 ` Al Viro
2020-09-21 15:26 ` David Laight
2020-09-21 15:07 ` Al Viro
2020-09-21 14:34 ` [PATCH 05/11] iov_iter: merge the compat case into rw_copy_check_uvector Christoph Hellwig
2020-09-21 15:14 ` Al Viro
2021-01-08 11:49 ` David Laight
2020-09-21 14:34 ` [PATCH 06/11] iov_iter: handle the compat case in import_iovec Christoph Hellwig
2020-09-21 15:20 ` Al Viro
2020-09-21 14:34 ` [PATCH 07/11] fs: remove various compat readv/writev helpers Christoph Hellwig
2020-09-21 14:34 ` [PATCH 08/11] fs: remove the compat readv/writev syscalls Christoph Hellwig
2020-09-21 14:34 ` [PATCH 09/11] fs: remove compat_sys_vmsplice Christoph Hellwig
2020-09-21 14:34 ` [PATCH 10/11] mm: remove compat_process_vm_{readv,writev} Christoph Hellwig
2020-09-21 14:34 ` [PATCH 11/11] security/keys: remove compat_keyctl_instantiate_key_iov Christoph Hellwig
2020-09-23 6:05 ` let import_iovec deal with compat_iovecs as well v3 Christoph Hellwig
2020-09-23 6:05 ` [PATCH 1/9] compat.h: fix a spelling error in <linux/compat.h> Christoph Hellwig
2020-09-23 6:05 ` [PATCH 2/9] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c Christoph Hellwig
2020-09-23 6:05 ` [PATCH 3/9] iov_iter: refactor rw_copy_check_uvector and import_iovec Christoph Hellwig
2020-09-23 14:16 ` Al Viro
2020-09-23 14:38 ` David Laight
2020-09-23 14:49 ` Al Viro
2020-09-23 14:40 ` Al Viro
2020-09-23 6:05 ` [PATCH 4/9] iov_iter: transparently handle compat iovecs in import_iovec Christoph Hellwig
2020-09-23 6:05 ` [PATCH 5/9] fs: remove various compat readv/writev helpers Christoph Hellwig
2020-09-23 14:25 ` Al Viro
2020-09-23 14:32 ` Christoph Hellwig
2020-09-23 14:59 ` Al Viro
2020-09-23 16:38 ` Al Viro
2020-09-23 17:05 ` Al Viro
2020-09-23 17:46 ` Christoph Hellwig
2020-09-23 17:08 ` Brian Gerst
2020-09-23 18:45 ` Arnd Bergmann
2020-09-23 19:47 ` Al Viro
2020-09-23 19:52 ` Arnd Bergmann
2020-09-23 21:30 ` David Laight
2020-09-23 6:05 ` [PATCH 6/9] fs: remove the compat readv/writev syscalls Christoph Hellwig
2020-09-23 6:05 ` [PATCH 7/9] fs: remove compat_sys_vmsplice Christoph Hellwig
2020-09-23 6:05 ` [PATCH 8/9] mm: remove compat_process_vm_{readv,writev} Christoph Hellwig
2020-09-23 6:05 ` [PATCH 9/9] security/keys: remove compat_keyctl_instantiate_key_iov Christoph Hellwig
2020-09-25 4:51 ` let import_iovec deal with compat_iovecs as well v4 Christoph Hellwig
2020-09-25 4:51 ` [PATCH 1/9] compat.h: fix a spelling error in <linux/compat.h> Christoph Hellwig
2020-09-25 4:51 ` [PATCH 2/9] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c Christoph Hellwig
2020-10-21 16:13 ` Buggy commit tracked to: "Re: [PATCH 2/9] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c" Greg KH
2020-10-21 20:59 ` David Laight
2020-10-21 23:39 ` Al Viro
2020-10-22 8:26 ` Greg KH
2020-10-22 8:35 ` David Hildenbrand
2020-10-22 8:40 ` David Laight
2020-10-22 8:48 ` David Hildenbrand
2020-10-22 9:01 ` Greg KH
2020-10-22 9:06 ` David Laight
2020-10-22 9:19 ` David Hildenbrand
2020-10-22 9:25 ` David Hildenbrand
2020-10-22 9:32 ` David Laight
2020-10-22 9:36 ` David Hildenbrand
2020-10-22 10:48 ` Greg KH
2020-10-22 12:18 ` Greg KH
2020-10-22 12:42 ` David Hildenbrand
2020-10-22 12:57 ` Greg KH
2020-10-22 13:50 ` Greg KH
[not found] ` <CAK8P3a1B7OVdyzW0-97JwzZiwp0D0fnSfyete16QTvPp_1m07A@mail.gmail.com>
2020-10-22 14:40 ` Greg KH
2020-10-22 16:15 ` David Laight
2020-10-23 12:46 ` David Laight
2020-10-23 13:09 ` David Hildenbrand
2020-10-23 14:33 ` David Hildenbrand
2020-10-23 14:39 ` David Laight
2020-10-23 14:47 ` 'Greg KH'
2020-10-23 16:33 ` David Hildenbrand
2020-11-02 9:06 ` David Laight
2020-11-02 13:52 ` 'Greg KH' [this message]
2020-11-02 18:23 ` David Laight
2020-10-23 17:58 ` Al Viro
2020-10-23 18:27 ` Segher Boessenkool
2020-10-23 21:28 ` David Laight
2020-10-24 17:29 ` Segher Boessenkool
2020-10-24 21:12 ` David Laight
[not found] ` <CAK8P3a1n+b8hOMhNQSDzgic03dyXbmpccfTJ3C1bGKvzsgMXbg@mail.gmail.com>
2020-10-23 13:28 ` David Laight
2020-10-22 13:23 ` Christoph Hellwig
2020-10-22 16:35 ` David Laight
2020-10-22 16:40 ` Matthew Wilcox
2020-10-22 16:50 ` David Laight
2020-10-22 17:00 ` Nick Desaulniers
2020-10-22 20:59 ` Eric Biggers
2020-10-22 21:28 ` Al Viro
2020-10-22 18:19 ` Al Viro
2020-10-22 17:54 ` Nick Desaulniers
[not found] ` <CAK8P3a3LjG+ZvmQrkb9zpgov8xBkQQWrkHBPgjfYSqBKGrwT4w@mail.gmail.com>
2020-10-22 19:04 ` Nick Desaulniers
2020-10-22 19:24 ` Al Viro
2020-10-22 19:27 ` Al Viro
2020-10-22 20:06 ` Al Viro
2020-10-22 20:09 ` Al Viro
2020-10-22 20:11 ` Nick Desaulniers
2020-10-22 22:07 ` David Laight
2020-10-23 13:12 ` David Hildenbrand
2020-10-22 22:04 ` David Laight
2020-10-22 9:28 ` David Laight
2020-10-22 9:02 ` David Laight
2020-09-25 4:51 ` [PATCH 3/9] iov_iter: refactor rw_copy_check_uvector and import_iovec Christoph Hellwig
2020-09-25 4:51 ` [PATCH 4/9] iov_iter: transparently handle compat iovecs in import_iovec Christoph Hellwig
2020-09-25 4:51 ` [PATCH 5/9] fs: remove various compat readv/writev helpers Christoph Hellwig
2020-09-25 4:51 ` [PATCH 6/9] fs: remove the compat readv/writev syscalls Christoph Hellwig
2020-09-25 4:51 ` [PATCH 7/9] fs: remove compat_sys_vmsplice Christoph Hellwig
2020-09-25 4:51 ` [PATCH 8/9] mm: remove compat_process_vm_{readv,writev} Christoph Hellwig
2020-09-25 4:51 ` [PATCH 9/9] security/keys: remove compat_keyctl_instantiate_key_iov Christoph Hellwig
2020-09-25 15:23 ` let import_iovec deal with compat_iovecs as well v4 Al Viro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201102135202.GA1016272@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=David.Laight@aculab.com \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=axboe@kernel.dk \
--cc=david@redhat.com \
--cc=dhowells@redhat.com \
--cc=hch@lst.de \
--cc=io-uring@vger.kernel.org \
--cc=kernel-team@android.com \
--cc=keyrings@vger.kernel.org \
--cc=linux-aio@kvack.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-parisc@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=ndesaulniers@google.com \
--cc=netdev@vger.kernel.org \
--cc=sparclinux@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).