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YiFei Zhu 0f5d82f187 net/filter: Permit reading NET in load_bytes_relative when MAC not set 
Added a check in the switch case on start_header that checks for
the existence of the header, and in the case that MAC is not set
and the caller requests for MAC, -EFAULT. If the caller requests
for NET then MAC's existence is completely ignored.

There is no function to check NET header's existence and as far
as cgroup_skb/egress is concerned it should always be set.

Removed for ptr >= the start of header, considering offset is
bounded unsigned and should always be true. len <= end - mac is
redundant to ptr + len <= end.

Fixes: 3eee1f75f2 ("bpf: fix bpf_skb_load_bytes_relative pkt length check")
Signed-off-by: YiFei Zhu <zhuyifei@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/76bb820ddb6a95f59a772ecbd8c8a336f646b362.1591812755.git.zhuyifei@google.com
 		2020-06-11 16:05:56 +02:00
..
6lowpan
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9p 9pnet: allow making incomplete read requests 2020-03-27 09:29:56 +00:00
802 net: 802: psnap.c: Use built-in RCU list checking 2020-02-24 13:02:53 -08:00
8021q netpoll: accept NULL np argument in netpoll_send_skb() 2020-05-07 18:11:07 -07:00
appletalk ipv4,appletalk: move SIOCADDRT and SIOCDELRT handling into ->compat_ioctl 2020-05-18 17:35:02 -07:00
atm atm: switch do_atmif_sioc() to direct use of atm_dev_ioctl() 2020-05-20 20:31:36 -04:00
ax25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-24 13:47:27 -07:00
batman-adv This cleanup patchset includes the following patches: 2020-05-26 15:19:29 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
bpf bpf: Fix too large copy from user in bpf_test_init 2020-05-19 17:56:34 +02:00
bpfilter SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
caif net: caif: Fix use correct return type for ndo_start_xmit() 2020-04-30 12:13:07 -07:00
can
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ceph Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
core net/filter: Permit reading NET in load_bytes_relative when MAC not set 2020-06-11 16:05:56 +02:00
dcb
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dccp ipv6: move SIOCADDRT and SIOCDELRT handling into ->compat_ioctl 2020-05-18 17:35:02 -07:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-05-01 17:02:27 -07:00
dns_resolver docs: networking: convert dns_resolver.txt to ReST 2020-04-28 14:39:46 -07:00
dsa Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
ethernet net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
ethtool net: ethtool: cabletest: Make ethnl_act_cable_test_tdr_cfg static 2020-05-29 17:28:30 -07:00
hsr hsr: remove WARN_ONCE() in hsr_fill_frame_info() 2020-05-07 17:40:02 -07:00
ieee802154 ieee802154: 6lowpan: remove unnecessary comparison 2020-05-08 22:25:10 -07:00
ife
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ipv4 bpf/sockmap: Fix kernel panic at __tcp_bpf_recvmsg 2020-06-09 10:56:36 -07:00
ipv6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
iucv net/af_iucv: clean up function prototypes 2020-05-19 12:50:14 -07:00
kcm net: kcm: kcmproc.c: Fix RCU list suspicious usage warning 2020-03-16 17:14:02 -07:00
key
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l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
l3mdev
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lapb docs: networking: convert lapb-module.txt to ReST 2020-04-30 12:56:35 -07:00
llc af_llc: fix if-statement empty body warning 2020-02-26 20:38:13 -08:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
mac802154
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mpls net: Make mpls_entry_encode() available for generic users 2020-05-29 21:20:20 -07:00
mptcp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
ncsi net/ncsi: Support for multi host mellanox card 2020-01-09 18:36:22 -08:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
netlabel netlabel: cope with NULL catmap 2020-05-12 18:12:40 -07:00
netlink bpf: Enable bpf_iter targets registering ctx argument types 2020-05-13 12:30:50 -07:00
netrom net: partially revert dynamic lockdep key changes 2020-05-04 12:05:56 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-12 22:34:48 -07:00
nsh
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openvswitch net: openvswitch: use div_u64() for 64-by-32 divisions 2020-04-25 20:48:21 -07:00
packet net/packet: tpacket_rcv: avoid a producer race condition 2020-03-15 00:25:25 -07:00
phonet sysctl: pass kernel pointers to ->proc_handler 2020-04-27 02:07:40 -04:00
psample net: psample: fix build error when CONFIG_INET is not enabled 2020-05-23 16:36:05 -07:00
qrtr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
rds tcp: add tcp_sock_set_keepcnt 2020-05-28 11:11:45 -07:00
rfkill
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rose net: partially revert dynamic lockdep key changes 2020-05-04 12:05:56 -07:00
rxrpc rxrpc: add rxrpc_sock_set_min_security_level 2020-05-28 11:11:46 -07:00
sched cls_flower: remove mpls_opts_policy 2020-06-01 12:01:05 -07:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
strparser
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sunrpc ipv6: add ip6_sock_set_recvpktinfo 2020-05-28 11:11:46 -07:00
switchdev net: switchdev: do not propagate bridge updates across bridges 2020-02-26 20:58:33 -08:00
tipc Revert "tipc: Fix potential tipc_aead refcnt leak in tipc_crypto_rcv" 2020-06-02 15:13:47 -07:00
tls bpf: Fix running sk_skb program types with ktls 2020-06-01 14:48:32 -07:00
unix net: datagram: drop 'destructor' argument from several helpers 2020-02-28 12:12:53 -08:00
vmw_vsock virtio_vsock: Fix race condition in virtio_transport_recv_pkt 2020-05-30 17:44:01 -07:00
wimax
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wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
x25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-06 22:10:13 -07:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-05-31 17:48:46 -07:00
Kconfig net: ethtool: netlink: Add support for triggering a cable test 2020-05-10 12:28:41 -07:00
Makefile net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
compat.c switch cmsghdr_from_user_compat_to_kern() to copy_from_user() 2020-06-01 12:05:45 -07:00
devres.c net: devres: provide devm_register_netdev() 2020-05-23 16:56:17 -07:00
socket.c net: remove kernel_setsockopt 2020-05-29 13:10:39 -07:00
sysctl_net.c
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