AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/include/net
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Eric Dumazet f2c31e32b3 net: fix NULL dereferences in check_peer_redir() 
Gergely Kalman reported crashes in check_peer_redir().

It appears commit f39925dbde (ipv4: Cache learned redirect
information in inetpeer.) added a race, leading to possible NULL ptr
dereference.

Since we can now change dst neighbour, we should make sure a reader can
safely use a neighbour.

Add RCU protection to dst neighbour, and make sure check_peer_redir()
can be called safely by different cpus in parallel.

As neighbours are already freed after one RCU grace period, this patch
should not add typical RCU penalty (cache cold effects)

Many thanks to Gergely for providing a pretty report pointing to the
bug.

Reported-by: Gergely Kalman <synapse@hippy.csoma.elte.hu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-03 03:34:12 -07:00
..
9p fs/9p: add 9P2000.L unlinkat operation 2011-07-23 09:32:52 -05:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-15 10:05:24 -04:00
caif caif: Add CAIF HSI Link layer driver 2011-06-01 21:15:38 -07:00
irda
iucv
netfilter atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
netns atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
phonet net: dont hold rtnl mutex during netlink dump callbacks 2011-05-02 15:26:28 -07:00
sctp atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
tc_act
act_api.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
addrconf.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_ieee802154.h
af_rxrpc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_unix.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
ah.h
arp.h net: Add ->neigh_lookup() operation to dst_ops 2011-07-18 00:40:17 -07:00
atmclip.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
ax25.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
ax88796.h
cfg80211.h cfg80211: allow userspace to control supported rates in scan 2011-07-19 16:49:58 -04:00
checksum.h
cipso_ipv4.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
cls_cgroup.h
compat.h net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
datalink.h
dcbevent.h
dcbnl.h dcbnl: Add CEE notification 2011-07-05 23:42:17 -07:00
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h
dsa.h
dsfield.h
dst_ops.h net: Add ->neigh_lookup() operation to dst_ops 2011-07-18 00:40:17 -07:00
dst.h net: fix NULL dereferences in check_peer_redir() 2011-08-03 03:34:12 -07:00
esp.h
ethoc.h
fib_rules.h
flow.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
garp.h garp: remove last synchronize_rcu() call 2011-05-12 17:46:56 -04:00
gen_stats.h
genetlink.h netlink: advertise incomplete dumps 2011-06-22 16:09:45 -04:00
gre.h
icmp.h
ieee80211_radiotap.h
ieee802154_netdev.h
ieee802154.h
if_inet6.h ipv6: reduce per device ICMP mib sizes 2011-05-19 16:21:22 -04:00
inet6_connection_sock.h inet: Pass flowi to ->queue_xmit(). 2011-05-08 15:28:28 -07:00
inet6_hashtables.h
inet_common.h
inet_connection_sock.h ipv4: Make caller provide flowi4 key to inet_csk_route_req(). 2011-05-18 18:32:03 -04:00
inet_ecn.h ipv6: restore correct ECN handling on TCP xmit 2011-05-12 18:52:14 -04:00
inet_frag.h
inet_hashtables.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
inet_sock.h inet: Decrease overhead of on-stack inet_cork. 2011-05-06 15:37:57 -07:00
inet_timewait_sock.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
inetpeer.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
ip6_checksum.h
ip6_fib.h ipv6: Get rid of rt6i_nexthop macro. 2011-07-17 23:11:35 -07:00
ip6_route.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
ip6_tunnel.h
ip_fib.h ipv4: Call fib_select_default() only when actually necessary. 2011-04-14 15:05:22 -07:00
ip_vs.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
ip.h ipv4: Add ip_defrag() agent IP_DEFRAG_AF_PACKET. 2011-07-05 22:34:52 -07:00
ipcomp.h
ipconfig.h
ipip.h
ipv6.h ipv6: make fragment identifications less predictable 2011-07-21 21:25:58 -07:00
ipx.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
iw_handler.h
lapb.h
lib80211.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h bonding,llc: Fix structure sizeof incompatibility for some PDUs 2011-05-13 15:13:24 -04:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
mac80211.h mac80211: sync driver before TX 2011-07-20 15:04:35 -04:00
mip6.h
mld.h
ndisc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
neighbour.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
net_namespace.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
net_ratelimit.h net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00
netdma.h
netevent.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
netlabel.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
netlink.h netlink: advertise incomplete dumps 2011-06-22 16:09:45 -04:00
netrom.h
nexthop.h
nfc.h NFC: add nfc generic netlink interface 2011-07-05 15:26:57 -04:00
nl802154.h
p8022.h
ping.h net: ping: fix build failure 2011-05-17 14:16:58 -04:00
pkt_cls.h
pkt_sched.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
protocol.h
psnap.h
raw.h
rawv6.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
red.h
regulatory.h
request_sock.h
rose.h
route.h ipv4: Pass explicit destination address to rt_bind_peer(). 2011-05-18 18:42:43 -04:00
rtnetlink.h rtnetlink: Compute and store minimum ifinfo dump size 2011-06-09 20:38:07 -07:00
sch_generic.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
scm.h
slhc_vj.h
snmp.h snmp: reduce percpu needs by 50% 2011-06-11 16:23:59 -07:00
sock.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-07-25 13:56:39 -07:00
stp.h
tcp_states.h
tcp.h tcp: RFC2988bis + taking RTT sample from 3WHS for the passive open side 2011-06-08 17:05:30 -07:00
timewait_sock.h
transp_v6.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
udp.h
udplite.h
wext.h
wimax.h net: wimax: Remove of unused 'rfkill_input' pointer 2011-06-24 17:50:44 -07:00
wpan-phy.h
x25.h
x25device.h
xfrm.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-3.6 2011-05-11 14:26:58 -04:00