Re: KASAN: use-after-free Read in rxe_query_port

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On Mon, Mar 09, 2020 at 02:34:51PM -0300, Jason Gunthorpe wrote:
> On Sun, Mar 01, 2020 at 03:20:12AM -0800, syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit:    f8788d86 Linux 5.6-rc3
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=132d3645e00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=9833e26bab355358
> > dashboard link: https://syzkaller.appspot.com/bug?extid=e11efb687f5ab7f01f3d
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> >
> > Unfortunately, I don't have any reproducer for this crash yet.
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+e11efb687f5ab7f01f3d@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> Yanjun, do you have some idea what this could be?

See this fix in the net mailing list.
https://lore.kernel.org/netdev/20200306134518.84416-1-kgraul@xxxxxxxxxxxxx

Thanks

>
> Thanks,
> Jason



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