Eric Dumazet 57ffb0ecf3 packet: avoid panic in packet_getsockopt() ...

[ Upstream commit 509c7a1ecc ]

syzkaller got crashes in packet_getsockopt() processing
PACKET_ROLLOVER_STATS command while another thread was managing
to change po->rollover

Using RCU will fix this bug. We might later add proper RCU annotations
for sparse sake.

In v2: I replaced kfree(rollover) in fanout_add() to kfree_rcu()
variant, as spotted by John.

Fixes: a9b6391814 ("packet: rollover statistics")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: John Sperbeck <jsperbeck@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-11-18 11:22:22 +01:00

..

af_packet.c

packet: avoid panic in packet_getsockopt()

2017-11-18 11:22:22 +01:00

diag.c

netlink: make nlmsg_end() and genlmsg_end() void

2015-01-18 01:03:45 -05:00

internal.h

packet: add classic BPF fanout mode

2015-08-17 14:22:47 -07:00

Kconfig

packet: Diag core and basic socket info dumping

2012-08-14 16:56:33 -07:00

Makefile

packet: Diag core and basic socket info dumping

2012-08-14 16:56:33 -07:00