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Denis Lunev ac57b3a9ce [NETLINK]: Don't attach callback to a going-away netlink socket ... There is a race between netlink_dump_start() and netlink_release() that can lead to the situation when a netlink socket with non-zero callback is freed. Here it is: CPU1: CPU2 netlink_release(): netlink_dump_start(): sk = netlink_lookup(); /* OK */ netlink_remove(); spin_lock(&nlk->cb_lock); if (nlk->cb) { /* false */ ... } spin_unlock(&nlk->cb_lock); spin_lock(&nlk->cb_lock); if (nlk->cb) { /* false */ ... } nlk->cb = cb; spin_unlock(&nlk->cb_lock); ... sock_orphan(sk); /* * proceed with releasing * the socket */ The proposal it to make sock_orphan before detaching the callback in netlink_release() and to check for the sock to be SOCK_DEAD in netlink_dump_start() before setting a new callback. Signed-off-by: Denis Lunev <den@openvz.org> Signed-off-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Pavel Emelianov <xemul@openvz.org> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>		18 years ago
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802	…
8021q	[VLAN]: Allow VLAN interface on top of bridge interface	18 years ago
appletalk	…
atm	…
ax25	…
bluetooth	…
bridge	[BRIDGE]: Unaligned access when comparing ethernet addresses	18 years ago
core	[NET]: Set a separate lockdep class for neighbour table's proxy_queue	18 years ago
dccp	…
decnet	…
econet	…
ethernet	…
ieee80211	…
ipv4	[NETFILTER] arp_tables: Fix unaligned accesses.	18 years ago
ipv6	[IPV6] SNMP: Fix {In,Out}NoRoutes statistics.	18 years ago
ipx	…
irda	[IrDA]: Correctly handling socket error	18 years ago
iucv	…
key	[IPSEC] af_key: Fix thinko in pfkey_xfrm_policy2msg()	18 years ago
lapb	…
llc	…
netfilter	…
netlabel	…
netlink	[NETLINK]: Don't attach callback to a going-away netlink socket	18 years ago
netrom	…
packet	…
rose	…
rxrpc	…
sched	…
sctp	[SCTP]: Do not interleave non-fragments when in partial delivery	18 years ago
sunrpc	knfsd: use a spinlock to protect sk_info_authunix	18 years ago
tipc	…
unix	…
wanrouter	…
x25	…
xfrm	[IPSEC] XFRM_USER: kernel panic when large security contexts in ACQUIRE	18 years ago
Kconfig	…
Makefile	…
TUNABLE	…
compat.c	…
nonet.c	…
socket.c	…
sysctl_net.c	…