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Cong Wang 478c4b2ffd net_sched: fix an OOB access in cls_tcindex 
[ Upstream commit 599be01ee5 ]

As Eric noticed, tcindex_alloc_perfect_hash() uses cp->hash
to compute the size of memory allocation, but cp->hash is
set again after the allocation, this caused an out-of-bound
access.

So we have to move all cp->hash initialization and computation
before the memory allocation. Move cp->mask and cp->shift together
as cp->hash may need them for computation too.

Reported-and-tested-by: syzbot+35d4dea36c387813ed31@syzkaller.appspotmail.com
Fixes: 331b72922c ("net: sched: RCU cls_tcindex")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-11 04:33:53 -08:00
..
6lowpan 6lowpan: Off by one handling ->nexthdr 2020-01-27 14:50:41 +01:00
9p 9p: Transport error uninitialized 2019-10-11 18:21:12 +02:00
802
8021q vlan: vlan_changelink() should propagate errors 2020-01-12 12:17:28 +01:00
appletalk appletalk: Set error code if register_snap_client failed 2019-12-13 08:52:59 +01:00
atm net: use skb_queue_empty_lockless() in poll() handlers 2019-11-10 11:27:48 +01:00
ax25 ax25: enforce CAP_NET_RAW for raw sockets 2019-10-05 13:09:32 +02:00
batman-adv batman-adv: Fix DAT candidate selection on little endian systems 2020-01-23 08:21:34 +01:00
bluetooth Bluetooth: Fix race condition in hci_release_sock() 2020-02-05 14:43:39 +00:00
bpf bpf/test_run: support cgroup local storage 2018-08-03 00:47:32 +02:00
bpfilter signal/bpfilter: Fix bpfilter_kernl to use send_sig not force_sig 2020-01-27 14:50:51 +01:00
bridge netfilter: ebtables: CONFIG_COMPAT: reject trailing data after last rule 2020-01-27 14:50:47 +01:00
caif net: use skb_queue_empty_lockless() in poll() handlers 2019-11-10 11:27:48 +01:00
can can: gw: Fix error path of cgw_module_init 2019-08-29 08:28:30 +02:00
ceph libceph: fix PG split vs OSD (re)connect race 2019-08-29 08:28:50 +02:00
core net: Fix skb->csum update in inet_proto_csum_replace16(). 2020-02-05 14:43:53 +00:00
dcb net: dcb: Add priority-to-DSCP map getters 2018-07-27 13:17:50 -07:00
dccp dccp: Fix memleak in __feat_register_sp 2020-01-17 19:46:58 +01:00
decnet net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2020-01-04 19:13:37 +01:00
dns_resolver net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
dsa net: dsa: Avoid null pointer when failing to connect to PHY 2020-01-27 14:50:34 +01:00
ethernet net: add annotations on hh->hh_len lockless accesses 2020-01-09 10:19:09 +01:00
hsr net: hsr: fix possible NULL deref in hsr_handle_frame() 2020-02-11 04:33:52 -08:00
ieee802154 inet: frags: call inet_frags_fini() after unregister_pernet_subsys() 2020-01-27 14:50:51 +01:00
ife
ipv4 vti[6]: fix packet tx through bpf_redirect() 2020-02-05 14:43:49 +00:00
ipv6 vti[6]: fix packet tx through bpf_redirect() 2020-02-05 14:43:49 +00:00
iucv net/af_iucv: always register net_device notifier 2020-01-27 14:50:56 +01:00
kcm kcm: switch order of device registration to fix a crash 2019-04-17 08:38:40 +02:00
key af_key: fix leaks in key_pol_get_resp and dump_sp. 2019-07-26 09:14:01 +02:00
l2tp l2tp: Allow duplicate session creation with UDP 2020-02-11 04:33:52 -08:00
l3mdev
lapb lapb: fixed leak of control-blocks. 2019-06-22 08:15:13 +02:00
llc llc: fix sk_buff refcounting in llc_conn_state_process() 2020-01-27 14:51:17 +01:00
mac80211 mac80211: Fix TKIP replay protection immediately after key setup 2020-02-05 14:43:46 +00:00
mac802154 net: mac802154: tx: expand tailroom if necessary 2018-08-06 11:21:37 +02:00
mpls mpls: fix warning with multi-label encap 2020-01-27 14:50:54 +01:00
ncsi net/ncsi: Fixup .dumpit message flags and ID check in Netlink handler 2018-08-22 21:39:08 -07:00
netfilter netfilter: nft_tunnel: ERSPAN_VERSION must not be null 2020-02-05 14:43:47 +00:00
netlabel netlabel: fix out-of-bounds memory accesses 2019-03-10 07:17:18 +01:00
netlink genetlink: Fix a memory leak on error path 2019-04-03 06:26:15 +02:00
netrom netrom: hold sock when setting skb->destructor 2019-07-28 08:29:27 +02:00
nfc net: nfc: nci: fix a possible sleep-in-atomic-context bug in nci_uart_tty_receive() 2019-12-31 16:34:38 +01:00
nsh
openvswitch openvswitch: support asymmetric conntrack 2019-12-21 10:57:14 +01:00
packet packet: fix data-race in fanout_flow_is_huge() 2020-01-27 14:51:21 +01:00
phonet net: use skb_queue_empty_lockless() in poll() handlers 2019-11-10 11:27:48 +01:00
psample net: psample: fix skb_over_panic 2019-12-05 09:21:30 +01:00
qrtr net: qrtr: fix memort leak in qrtr_tun_write_iter 2019-12-13 08:52:58 +01:00
rds net/rds: Fix 'ib_evt_handler_call' element in 'rds_ib_stat_names' 2020-01-27 14:51:13 +01:00
rfkill rfkill: Fix incorrect check to avoid NULL pointer dereference 2020-01-12 12:17:17 +01:00
rose net/rose: fix unbound loop in rose_loopback_timer() 2019-05-02 09:59:00 +02:00
rxrpc rxrpc: Fix trace-after-put looking at the put connection record 2020-01-27 14:51:16 +01:00
sched net_sched: fix an OOB access in cls_tcindex 2020-02-11 04:33:53 -08:00
sctp sctp: add chunks to sk_backlog when the newsk sk_socket is not set 2020-01-27 14:51:17 +01:00
smc net/smc: receive pending data after RCV_SHUTDOWN 2020-01-27 14:51:18 +01:00
strparser net: strparser: partially revert "strparser: Call skb_unclone conditionally" 2019-05-16 19:41:27 +02:00
sunrpc xprtrdma: Fix use-after-free in rpcrdma_post_recvs 2020-01-27 14:50:59 +01:00
switchdev
tipc tipc: reduce risk of wakeup queue starvation 2020-01-27 14:51:02 +01:00
tls net/tls: fix socket wmem accounting on fallback with netem 2020-01-27 14:51:01 +01:00
unix af_unix: add compat_ioctl support 2020-01-17 19:47:07 +01:00
vmw_vsock VSOCK: bind to random port for VMADDR_PORT_ANY 2019-12-05 09:20:19 +01:00
wimax wimax: remove blank lines at EOF 2018-07-24 14:10:42 -07:00
wireless wireless: wext: avoid gcc -O3 warning 2020-02-05 14:43:46 +00:00
x25 net/x25: fix nonblocking connect 2020-01-29 16:43:24 +01:00
xdp xsk: Fix registration of Rx-only sockets 2020-01-27 14:51:19 +01:00
xfrm xfrm: interface: do not confirm neighbor when do pmtu update 2020-02-05 14:43:49 +00:00
compat.c sock: Make sock->sk_stamp thread-safe 2019-01-09 17:38:33 +01:00
Kconfig net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
Makefile
socket.c compat_ioctl: handle SIOCOUTQNSD 2020-01-17 19:47:07 +01:00
sysctl_net.c