Philip Pettersson 84ac726023 packet: fix race condition in packet_set_ring ... When packet_set_ring creates a ring buffer it will initialize a struct timer_list if the packet version is TPACKET_V3. This value can then be raced by a different thread calling setsockopt to set the version to TPACKET_V1 before packet_set_ring has finished. This leads to a use-after-free on a function pointer in the struct timer_list when the socket is closed as the previously initialized timer will not be deleted. The bug is fixed by taking lock_sock(sk) in packet_setsockopt when changing the packet version while also taking the lock at the start of packet_set_ring. Fixes: f6fb8f100b ("af-packet: TPACKET_V3 flexible buffer implementation.") Signed-off-by: Philip Pettersson <philip.pettersson@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-12-02 12:16:49 -05:00
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af_packet.c	packet: fix race condition in packet_set_ring	2016-12-02 12:16:49 -05:00
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