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 <bvanass...@acm.org>
> 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)?

Cheers,

Will

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