Willem de Bruijn 8f716035da packet: fix tp_reserve race in packet_set_ring ...

commit c27927e372 upstream.

Updates to tp_reserve can race with reads of the field in
packet_set_ring. Avoid this by holding the socket lock during
updates in setsockopt PACKET_RESERVE.

This bug was discovered by syzkaller.

Fixes: 8913336a7e ("packet: add PACKET_RESERVE sockopt")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

2017-08-26 02:14:06 +01:00

..

af_packet.c

packet: fix tp_reserve race in packet_set_ring

2017-08-26 02:14:06 +01:00

Kconfig

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Makefile

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