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SubjectRe: general protection fault in delayed_uprobe_remove
On Thu, 21 Mar 2019 17:18:41 +0100
Oleg Nesterov <oleg@redhat.com> wrote:

> iiuc,
>
> #syz fix: Uprobes: Fix kernel oops with delayed_uprobe_remove()

Thanks, because I haven't been able to reproduce this, and couldn't see
how it could bug like it did by looking at the current code.

-- Steve

>
> On 03/21, syzbot wrote:
> >
> > syzbot has bisected this bug to:
> >
> > commit a6ca88b241d5e929e6e60b12ad8cd288f0ffa256
> > Author: Song Liu <songliubraving@fb.com>
> > Date: Tue Oct 2 05:36:36 2018 +0000
> >
> > trace_uprobe: support reference counter in fd-based uprobe
> >
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12c86993200000
> > start commit: a6ca88b2 trace_uprobe: support reference counter in fd-bas..
> > git tree: linux-next
> > final crash: https://syzkaller.appspot.com/x/report.txt?x=11c86993200000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=16c86993200000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=2a22859d870756c1
> > dashboard link: https://syzkaller.appspot.com/bug?extid=eab6e18f95a9fe69005e
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137174f5400000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1278485d400000
> >
> > Reported-by: syzbot+eab6e18f95a9fe69005e@syzkaller.appspotmail.com
> > Fixes: a6ca88b241d5 ("trace_uprobe: support reference counter in fd-based
> > uprobe")

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