On Thu, Feb 9, 2017 at 7:12 AM, Sowmini Varadhan <sowmini.varad...@oracle.com> wrote: > On (02/09/17 14:14), Dmitry Vyukov wrote: >> >> Call Trace: > : >> packet_rcv_has_room+0x25/0xb0 net/packet/af_packet.c:1308 >> fanout_demux_rollover+0x3bb/0x6b0 net/packet/af_packet.c:1388 >> packet_rcv_fanout+0x674/0x800 net/packet/af_packet.c:1490 >> dev_queue_xmit_nit+0x73a/0xa90 net/core/dev.c:1898 > : >> tcp_sendmsg_fastopen net/ipv4/tcp.c:1110 [inline] > : > > looks like a race between a NIT socket (tcpdump, maybe?) that is closing, > and a standard tcp socket.. packet_release() takes the po->bind_lock > to remove the socket from the ptype_all NIT queue. but how does > that sync with the Tx path for other af_inet/af_inet6 sockets?
RCU protection for hooks.
