Hi Edward, On Tue, Apr 9, 2024 at 9:49 AM Edward Adam Davis <eadavis@xxxxxx> wrote: > > If optlen < sizeof(u32) it will trigger oob, so take the min of them. > > Reported-by: syzbot+b71011ec0a23f4d15625@xxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Edward Adam Davis <eadavis@xxxxxx> > --- > net/bluetooth/sco.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > index 43daf965a01e..815646d9e72b 100644 > --- a/net/bluetooth/sco.c > +++ b/net/bluetooth/sco.c > @@ -890,7 +890,7 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, > break; > > case BT_PKT_STATUS: > - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { > + if (copy_from_sockptr(&opt, optval, min_t(int, sizeof(u32), optlen))) { > err = -EFAULT; > break; > } > -- > 2.43.0 https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=289bfd91fcf22f7864f3817acff5d8ce9fe73307 -- Luiz Augusto von Dentz