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Jann Horn 6a3f723787 netfilter: nf_nat_snmp_basic: add missing length checks in ASN.1 cbs 
commit c4c07b4d6f upstream.

The generic ASN.1 decoder infrastructure doesn't guarantee that callbacks
will get as much data as they expect; callbacks have to check the `datalen`
parameter before looking at `data`. Make sure that snmp_version() and
snmp_helper() don't read/write beyond the end of the packet data.

(Also move the assignment to `pdata` down below the check to make it clear
that it isn't necessarily a pointer we can use before the `datalen` check.)

Fixes: cc2d58634e ("netfilter: nf_nat_snmp_basic: use asn1 decoder library")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-23 09:07:27 +01:00
..
bpfilter
bpfilter: remove trailing newline
2018-07-24 14:10:42 -07:00
netfilter
netfilter: nf_nat_snmp_basic: add missing length checks in ASN.1 cbs
2019-02-23 09:07:27 +01:00
af_inet.c
gso_segment: Reset skb->mac_len after modifying network header
2018-09-13 12:09:32 -07:00
ah4.c
…
arp.c
…
cipso_ipv4.c
net/ipv4: defensive cipso option parsing
2018-11-13 11:08:41 -08:00
datagram.c
…
devinet.c
route: add support for directed broadcast forwarding
2018-07-29 12:37:06 -07:00
esp4_offload.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2018-07-27 09:33:37 -07:00
esp4.c
…
fib_frontend.c
net: ipv4: Fix memory leak in network namespace dismantle
2019-01-31 08:14:32 +01:00
fib_lookup.h
…
fib_notifier.c
…
fib_rules.c
…
fib_semantics.c
net: ipv4: update fnhe_pmtu when first hop's MTU changes
2018-10-10 22:44:46 -07:00
fib_trie.c
net: ipv4: Fix memory leak in network namespace dismantle
2019-01-31 08:14:32 +01:00
fou.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
gre_demux.c
net: ip_gre: use erspan key field for tunnel lookup
2019-02-06 17:30:06 +01:00
gre_offload.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
icmp.c
ipv4: ipcm_cookie initializers
2018-07-07 10:58:49 +09:00
igmp.c
igmp: fix incorrect unsolicit report count after link down and up
2018-09-02 13:39:37 -07:00
inet_connection_sock.c
inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
2018-10-02 15:52:12 -07:00
inet_diag.c
tcp: fix a race in inet_diag_dump_icsk()
2019-01-09 17:38:33 +01:00
inet_fragment.c
inet: frags: better deal with smp races
2018-11-23 08:17:05 +01:00
inet_hashtables.c
bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection
2018-08-11 01:58:46 +02:00
inet_timewait_sock.c
…
inetpeer.c
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-23 09:07:24 +01:00
ip_forward.c
net: clear skb->tstamp in forwarding paths
2019-01-09 17:38:31 +01:00
ip_fragment.c
Fix "net: ipv4: do not handle duplicate fragments as overlapping"
2019-02-06 17:30:05 +01:00
ip_gre.c
net: ip_gre: use erspan key field for tunnel lookup
2019-02-06 17:30:06 +01:00
ip_input.c
net: Fix usage of pskb_trim_rcsum
2019-01-31 08:14:31 +01:00
ip_options.c
…
ip_output.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-24 19:21:58 -07:00
ip_sockglue.c
ip: on queued skb use skb_header_pointer instead of pskb_may_pull
2019-01-22 21:40:31 +01:00
ip_tunnel_core.c
ip_tunnel: don't force DF when MTU is locked
2018-11-23 08:17:02 +01:00
ip_tunnel.c
ip: validate header length on virtual device xmit
2019-01-09 17:38:31 +01:00
ip_vti.c
ip: validate header length on virtual device xmit
2019-01-09 17:38:31 +01:00
ipcomp.c
…
ipconfig.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-06-06 18:39:49 -07:00
ipip.c
…
ipmr_base.c
net: ipmr: fix unresolved entry dumps
2018-10-17 22:35:42 -07:00
ipmr.c
ipv4: Fix potential Spectre v1 vulnerability
2019-01-09 17:38:31 +01:00
Kconfig
net: remove blank lines at end of file
2018-07-24 14:10:43 -07:00
Makefile
net: remove blank lines at end of file
2018-07-24 14:10:43 -07:00
metrics.c
net: metrics: add proper netlink validation
2018-06-05 12:29:43 -04:00
netfilter.c
netfilter: utils: move nf_ip_checksum* from ipv4 to utils
2018-07-16 17:51:48 +02:00
netlink.c
…
ping.c
net: add helpers checking if socket can be bound to nonlocal address
2018-08-01 09:50:04 -07:00
proc.c
ip: discard IPv4 datagrams with overlapping segments.
2018-08-05 17:16:46 -07:00
protocol.c
…
raw_diag.c
…
raw.c
ip: remove tx_flags from ipcm_cookie and use same logic for v4 and v6
2018-07-07 10:58:49 +09:00
route.c
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-23 09:07:24 +01:00
syncookies.c
…
sysctl_net_ipv4.c
net-tcp: /proc/sys/net/ipv4/tcp_probe_interval is a u32 not int
2018-09-26 20:33:21 -07:00
tcp_bbr.c
tcp_bbr: apply PROBE_RTT cwnd cap even if acked==0
2018-08-22 21:45:32 -07:00
tcp_bic.c
…
tcp_cdg.c
…
tcp_cong.c
…
tcp_cubic.c
…
tcp_dctcp.c
tcp: avoid resetting ACK timer in DCTCP
2018-08-11 11:31:35 -07:00
tcp_diag.c
…
tcp_fastopen.c
…
tcp_highspeed.c
…
tcp_htcp.c
…
tcp_hybla.c
…
tcp_illinois.c
…
tcp_input.c
tcp: defer SACK compression after DupThresh
2018-12-05 19:32:00 +01:00
tcp_ipv4.c
tcp: tcp_v4_err() should be more careful
2019-02-23 09:07:26 +01:00
tcp_lp.c
…
tcp_metrics.c
…
tcp_minisocks.c
tcp: do not restart timewait timer on rst reception
2018-08-31 23:10:35 -07:00
tcp_nv.c
…
tcp_offload.c
tcp: Don't coalesce decrypted and encrypted SKBs
2018-07-16 00:12:09 -07:00
tcp_output.c
tcp: lack of available data can also cause TSO defer
2018-12-17 09:24:42 +01:00
tcp_rate.c
tcp: expose both send and receive intervals for rate sample
2018-07-11 23:01:56 -07:00
tcp_recovery.c
tcp: add stat of data packet reordering events
2018-08-01 09:56:10 -07:00
tcp_scalable.c
…
tcp_timer.c
tcp: change txhash on SYN-data timeout
2019-01-22 21:40:30 +01:00
tcp_ulp.c
tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach
2018-08-16 14:58:08 -07:00
tcp_vegas.c
…
tcp_vegas.h
…
tcp_veno.c
…
tcp_westwood.c
…
tcp_yeah.c
…
tcp.c
tcp: clear icsk_backoff in tcp_write_queue_purge()
2019-02-23 09:07:26 +01:00
tunnel4.c
…
udp_diag.c
udp: fix rx queue len reported by diag and proc interface
2018-06-08 19:55:15 -04:00
udp_impl.h
…
udp_offload.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
udp_tunnel.c
…
udp.c
udp: with udp_segment release on error path
2019-01-31 08:14:33 +01:00
udplite.c
…
xfrm4_input.c
xfrm: reset transport header back to network header after all input transforms ahave been applied
2018-09-04 10:26:30 +02:00
xfrm4_mode_beet.c
…
xfrm4_mode_transport.c
xfrm: reset transport header back to network header after all input transforms ahave been applied
2018-09-04 10:26:30 +02:00
xfrm4_mode_tunnel.c
…
xfrm4_output.c
…
xfrm4_policy.c
…
xfrm4_protocol.c
…
xfrm4_state.c
…
xfrm4_tunnel.c
…