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

2018-03-14 Thread Eric Dumazet
On 03/14/2018 05:16 PM, Eric Dumazet wrote: > > typical use after free... > > diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c > index > 190570f21b208d5a17943360a3a6f85e1c2a2187..663e016491773f40f81d9bbfeab3dd68e1c2fc5c > 100644 > --- a/net/sched/sch_generic.c > +++

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

2018-03-14 Thread Eric Dumazet
On 03/14/2018 05:16 PM, Eric Dumazet wrote: > > typical use after free... > > diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c > index > 190570f21b208d5a17943360a3a6f85e1c2a2187..663e016491773f40f81d9bbfeab3dd68e1c2fc5c > 100644 > --- a/net/sched/sch_generic.c > +++

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

2018-03-14 Thread Eric Dumazet
On 03/14/2018 04:30 PM, syzbot wrote: > syzbot has found reproducer for the following crash on net-next commit > a870a02cc963de35452bbed932560ed69725c4f2 (Tue Mar 13 20:58:39 2018 +) > pktgen: use dynamic allocation for debug print buffer > > So far this crash happened 7 times on mmots,

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

2018-03-14 Thread Eric Dumazet
On 03/14/2018 04:30 PM, syzbot wrote: > syzbot has found reproducer for the following crash on net-next commit > a870a02cc963de35452bbed932560ed69725c4f2 (Tue Mar 13 20:58:39 2018 +) > pktgen: use dynamic allocation for debug print buffer > > So far this crash happened 7 times on mmots,