Hi Tomas, Marcel, Greg, On Mon, Nov 4, 2019 at 3:20 PM Marcel Holtmann <marcel@xxxxxxxxxxxx> wrote: > > Hi Tomas, > > > Syzbot reported an invalid-free that I introduced fixing a memleak. > > > > bcsp_recv() also frees bcsp->rx_skb but never nullifies its value. > > Nullify bcsp->rx_skb every time it is freed. > > > > Signed-off-by: Tomas Bortoli <tomasbortoli@xxxxxxxxx> > > Reported-by: syzbot+a0d209a4676664613e76@xxxxxxxxxxxxxxxxxxxxxxxxx > > --- > > drivers/bluetooth/hci_bcsp.c | 3 +++ > > 1 file changed, 3 insertions(+) > > patch has been applied to bluetooth-next tree. I believe this bug requires stable tags, as it can potentially provide an arbitrary write (via __skb_unlink) and is triggerable locally with user privileges. > Regards > > Marcel > > -- > You received this message because you are subscribed to the Google Groups "syzkaller" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller/E16896E5-B946-450F-BF42-04665D219EEA%40holtmann.org. -- Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Straße, 33 80636 München Geschäftsführer: Paul Manicle, Halimah DeLaine Prado Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg
