All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dmitry Vyukov <dvyukov@google.com>
To: syzbot <syzbot+345b75652b1d24227443@syzkaller.appspotmail.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	linux-ext4@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
	"Theodore Ts'o" <tytso@mit.edu>
Subject: Re: UBSAN: shift-out-of-bounds in ext4_fill_super
Date: Thu, 10 Dec 2020 09:09:51 +0100	[thread overview]
Message-ID: <CACT4Y+bkaVq1RzONGuPJxu-pSyCSRrEs7xV0sa2n0oLNkicHQQ@mail.gmail.com> (raw)
In-Reply-To: <00000000000024030c05b61412e6@google.com>

On Thu, Dec 10, 2020 at 4:50 AM syzbot
<syzbot+345b75652b1d24227443@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> failed to checkout kernel repo git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git on commit e360ba58d067a30a4e3e7d55ebdd919885a058d6: failed to run ["git" "fetch" "--tags" "d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8"]: exit status 1
> From git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
>  * [new branch]                bisect-test-ext4-035     -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/bisect-test-ext4-035
>  * [new branch]                bisect-test-generic-307  -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/bisect-test-generic-307
>  * [new branch]                dev                      -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/dev
>  * [new branch]                ext4-3.18                -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/ext4-3.18
>  * [new branch]                ext4-4.1                 -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/ext4-4.1
>  * [new branch]                ext4-4.4                 -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/ext4-4.4
>  * [new branch]                ext4-4.9                 -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/ext4-4.9
>  * [new branch]                ext4-dax                 -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/ext4-dax
>  * [new branch]                ext4-tools               -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/ext4-tools
>  * [new branch]                fix-bz-206443            -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/fix-bz-206443
>  * [new branch]                for-stable               -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/for-stable
>  * [new branch]                fsverity                 -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/fsverity
>  * [new branch]                lazy_journal             -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/lazy_journal
>  * [new branch]                master                   -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/master
>  * [new branch]                origin                   -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/origin
>  * [new branch]                pu                       -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/pu
>  * [new branch]                test                     -> d06f7b29746c7f0a52f349ff7fbf2a3f22d27cf8/test
>  * [new tag]                   ext4-for-linus-5.8-rc1-2 -> ext4-for-linus-5.8-rc1-2
>  ! [rejected]                  ext4_for_linus           -> ext4_for_linus  (would clobber existing tag)

Interesting. First time I see this. Should syzkaller use 'git fetch
--tags --force"?...
StackOverflow suggests it should help:
https://stackoverflow.com/questions/58031165/how-to-get-rid-of-would-clobber-existing-tag


>  * [new tag]                   ext4_for_linus_bugfixes  -> ext4_for_linus_bugfixes
>  * [new tag]                   ext4_for_linus_cleanups  -> ext4_for_linus_cleanups
>  * [new tag]                   ext4_for_linus_fixes     -> ext4_for_linus_fixes
>  * [new tag]                   ext4_for_linus_fixes2    -> ext4_for_linus_fixes2
>
>
>
> Tested on:
>
> commit:         [unknown
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git e360ba58d067a30a4e3e7d55ebdd919885a058d6
> dashboard link: https://syzkaller.appspot.com/bug?extid=345b75652b1d24227443
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> patch:          https://syzkaller.appspot.com/x/patch.diff?x=1499c287500000

  reply	other threads:[~2020-12-10  8:11 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-09  7:33 UBSAN: shift-out-of-bounds in ext4_fill_super syzbot
2020-12-10  2:36 ` Theodore Y. Ts'o
2020-12-10  3:50   ` syzbot
2020-12-10  8:09     ` Dmitry Vyukov [this message]
2020-12-10 13:56       ` Dmitry Vyukov
2020-12-10 19:24         ` syzbot
2020-12-10 18:28       ` Theodore Y. Ts'o
2020-12-14 14:37         ` Dmitry Vyukov
2020-12-14 20:36           ` Theodore Y. Ts'o
2020-12-15 10:09             ` Dmitry Vyukov

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=CACT4Y+bkaVq1RzONGuPJxu-pSyCSRrEs7xV0sa2n0oLNkicHQQ@mail.gmail.com \
    --to=dvyukov@google.com \
    --cc=adilger.kernel@dilger.ca \
    --cc=clang-built-linux@googlegroups.com \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=natechancellor@gmail.com \
    --cc=ndesaulniers@google.com \
    --cc=syzbot+345b75652b1d24227443@syzkaller.appspotmail.com \
    --cc=syzkaller-bugs@googlegroups.com \
    --cc=tytso@mit.edu \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.