Re: Re: kernel panic: stack is corrupted in pointer

[syzbot]

> Dmitry Vyukov wrote:
> > On Wed, Jul 17, 2019 at 10:58 AM syzbot
> > <syzbot+79f5f028005a77ecb6bb@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> > >
> > > Hello,
> > >
> > > syzbot found the following crash on:
> > >
> > > HEAD commit:    1438cde7 Add linux-next specific files for 20190716
> > > git tree:       linux-next
> > > console output:  
> > https://syzkaller.appspot.com/x/log.txt?x=13988058600000
> > > kernel config:   
> > https://syzkaller.appspot.com/x/.config?x=3430a151e1452331
> > > dashboard link:  
> > https://syzkaller.appspot.com/bug?extid=79f5f028005a77ecb6bb
> > > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > > syz repro:       
> > https://syzkaller.appspot.com/x/repro.syz?x=111fc8afa00000

> >  From the repro it looks like the same bpf stack overflow bug. +John
> > We need to dup them onto some canonical report for this bug, or this
> > becomes unmanageable.

> Fixes in bpf tree should fix this. Hopefully, we will squash this once  
> fixes
> percolate up.

> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git

">" does not look like a valid git branch or commit.



> > #syz dup: kernel panic: corrupted stack end in dput

> > > The bug was bisected to:
> > >
> > > commit 96a5d8d4915f3e241ebb48d5decdd110ab9c7dcf
> > > Author: Leo Liu <leo.liu@xxxxxxx>
> > > Date:   Fri Jul 13 15:26:28 2018 +0000
> > >
> > >      drm/amdgpu: Make sure IB tests flushed after IP resume
> > >
> > > bisection log:   
> > https://syzkaller.appspot.com/x/bisect.txt?x=14a46200600000
> > > final crash:     
> > https://syzkaller.appspot.com/x/report.txt?x=16a46200600000
> > > console output:  
> > https://syzkaller.appspot.com/x/log.txt?x=12a46200600000
> > >
> > > IMPORTANT: if you fix the bug, please add the following tag to the  
> > commit:
> > > Reported-by: syzbot+79f5f028005a77ecb6bb@xxxxxxxxxxxxxxxxxxxxxxxxx
> > > Fixes: 96a5d8d4915f ("drm/amdgpu: Make sure IB tests flushed after IP
> > > resume")
> > >
> > > Kernel panic - not syncing: stack-protector: Kernel stack is corrupted  
> > in:
> > > pointer+0x702/0x750 lib/vsprintf.c:2187
> > > Shutting down cpus with NMI
> > > Kernel Offset: disabled
> > >
> > >
> > > ---
> > > This bug is generated by a bot. It may contain errors.
> > > See https://goo.gl/tpsmEJ for more information about syzbot.
> > > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxxx
> > >
> > > syzbot will keep track of this bug report. See:
> > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> > > For information about bisection process see:  
> > https://goo.gl/tpsmEJ#bisection
> > > syzbot can test patches for this bug, for details see:
> > > https://goo.gl/tpsmEJ#testing-patches