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From: "J. Bruce Fields" <bfields@fieldses.org>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	syzbot <syzbot+1f371ca19b341a276761@syzkaller.appspotmail.com>,
	jlayton@kernel.org, linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
	Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: general protection fault in send_sigurg_to_task
Date: Wed, 15 Aug 2018 14:53:45 -0400	[thread overview]
Message-ID: <20180815185345.GB29569@fieldses.org> (raw)
In-Reply-To: <20180815101120.019f069e@canb.auug.org.au>

On Wed, Aug 15, 2018 at 10:11:20AM +1000, Stephen Rothwell wrote:
> Hi Bruce,
> 
> On Tue, 14 Aug 2018 13:50:20 -0700 Dmitry Vyukov <dvyukov@google.com> wrote:
> >
> > On Tue, Aug 14, 2018 at 12:11 PM, J. Bruce Fields <bfields@fieldses.org> wrote:
> > > On Mon, Aug 13, 2018 at 06:33:02AM -0700, syzbot wrote:  
> > >> syzbot has found a reproducer for the following crash on:
> > >>
> > >> HEAD commit:    5ed5da74de9e Add linux-next specific files for 20180813
> > >> git tree:       linux-next  
> > >
> > > I fetched linux-next but don't have 5ed5da74de9e.  
> > 
> > +Stephen for the disappeared linux-next commit.
> 
> That is just the HEAD commit on linux-next that day.  If you fetched
> linux-next after I released next-20180814 yesterday, then it would have
> a different HEAD commit.  If you check out the tag next-20180813, you
> will get the above HEAD commit.
> 
> > On the dashboard link you can see that it also happened on a more
> > recent commit 4e8b38549b50459a22573d756dd1f4e1963c2a8d that I do see
> > now in linux-next.
> 
> Which is just the HEAD commit of next-20180814.
> 
> Linux-next is rebuilt every day based on Linus' tree of the day,
> followed by merging all the other branches, so its HEAD is different
> every day.

I new it was rebuilt every day, but for some reason I expected git to
fetch all new tags.  But that's wrong, it just fetches whatever
branch(es) you request and then only tags that happen to reference stuff
on that branch; from git-fetch(1): "By default, any tag that points into
the histories being fetched is also fetched; the effect is to fetch tags
that point at branches that you are interested in. This default behavior
can be changed by using the --tags or --no-tags options or by
configuring remote.<name>.tagOpt.  By using a refspec that fetches tags
explicitly, you can fetch tags that do not point into branches you are
interested in as well."

Sorry for the confusion!

--b.

  reply	other threads:[~2018-08-15 21:47 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-13 12:54 general protection fault in send_sigurg_to_task syzbot
2018-08-13 13:33 ` syzbot
2018-08-14 19:11   ` J. Bruce Fields
2018-08-14 20:50     ` Dmitry Vyukov
2018-08-15  0:11       ` Stephen Rothwell
2018-08-15 18:53         ` J. Bruce Fields [this message]
2018-08-15 20:35       ` J. Bruce Fields
2018-08-16  4:01       ` Eric W. Biederman
2018-08-17 17:26         ` Dmitry Vyukov
2018-08-17 18:22           ` Eric W. Biederman
2018-08-17 18:38             ` J. Bruce Fields
2018-08-17 18:42             ` Dmitry Vyukov

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