Re: WARNING in is_bpf_text_address

[Bart Van Assche]

On 8/15/19 12:51 AM, Will Deacon wrote:
> Hi Bart,
>
> On Sat, Aug 10, 2019 at 05:24:06PM -0700, syzbot wrote:
> > syzbot has found a reproducer for the following crash on:
> >
> > HEAD commit:    451577f3 Merge tag 'kbuild-fixes-v5.3-3' of git://git.kern..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=120850a6600000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=2031e7d221391b8a
> > dashboard link: https://syzkaller.appspot.com/bug?extid=bd3bba6ff3fcea7a6ec6
> > compiler:       clang version 9.0.0 (/home/glider/llvm/clang
> > 80fee25776c2fb61e74c1ecb1a523375c2500b69)
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=130ffe4a600000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17137d2c600000
> >
> > The bug was bisected to:
> >
> > commit a0b0fd53e1e67639b303b15939b9c653dbe7a8c4
> > Author: Bart Van Assche <bvanassche@xxxxxxx>
> > Date:   Thu Feb 14 23:00:46 2019 +0000
> >
> >      locking/lockdep: Free lock classes that are no longer in use
> >
> > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=152f6a9da00000
> > final crash:    https://syzkaller.appspot.com/x/report.txt?x=172f6a9da00000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=132f6a9da00000
>
> I know you don't think much to these reports, but please could you have a
> look (even if it's just to declare it a false positive)?

Hi Will,

Had you already noticed the following message?

https://lore.kernel.org/bpf/d76d7a63-7854-e92d-30cb-52546d333ffe@xxxxxxxxxxxxx/

From that message: "Hey Bart, don't think it's related in any way to 
your commit. I'll allocate some time on working on this issue today, 
thanks!"

Bart.