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Kees Cook 7cba18332e net: sched: cls_u32: Avoid memcpy() false-positive warning 
To work around a misbehavior of the compiler's ability to see into
composite flexible array structs (as detailed in the coming memcpy()
hardening series[1]), use unsafe_memcpy(), as the sizing,
bounds-checking, and allocation are all very tightly coupled here.
This silences the false-positive reported by syzbot:

  memcpy: detected field-spanning write (size 80) of single field "&n->sel" at net/sched/cls_u32.c:1043 (size 16)

[1] https://lore.kernel.org/linux-hardening/20220901065914.1417829-2-keescook@chromium.org

Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Reported-by: syzbot+a2c4601efc75848ba321@syzkaller.appspotmail.com
Link: https://lore.kernel.org/lkml/000000000000a96c0b05e97f0444@google.com/
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20220927153700.3071688-1-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-09-29 18:44:07 -07:00
..
6lowpan
net: 6lowpan: constify lowpan_nhc structures
2022-06-09 21:53:28 +02:00
9p
iov_iter stuff, part 2, rebased
2022-08-08 20:04:35 -07:00
802
…
8021q
net: gro: skb_gro_header helper function
2022-08-25 10:33:21 +02:00
appletalk
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atm
…
ax25
ax25: move from strlcpy with unused retval to strscpy
2022-08-22 17:55:50 -07:00
batman-adv
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-22 13:02:10 -07:00
bluetooth
Bluetooth: hci_sync: Fix hci_read_buffer_size_sync
2022-09-02 14:01:28 -07:00
bpf
bpf, test_run: Propagate bpf_flow_dissect's retval to user's bpf_attr.test.retval
2022-08-23 22:48:03 +02:00
bpfilter
…
bridge
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-22 13:02:10 -07:00
caif
caif: move from strlcpy with unused retval to strscpy
2022-08-22 17:57:35 -07:00
can
can: bcm: check the result of can_send() in bcm_can_tx()
2022-09-23 13:53:10 +02:00
ceph
libceph: clean up ceph_osdc_start_request prototype
2022-08-03 14:05:39 +02:00
core
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-29 14:30:51 -07:00
dcb
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dccp
tcp: Introduce optional per-netns ehash.
2022-09-20 10:21:50 -07:00
dns_resolver
…
dsa
net: dsa: make user ports return to init_net on netns deletion
2022-09-26 11:28:57 -07:00
ethernet
net: gro: skb_gro_header helper function
2022-08-25 10:33:21 +02:00
ethtool
net: phy: Add support for rate matching
2022-09-23 11:55:35 +01:00
hsr
genetlink: start to validate reserved header bytes
2022-08-29 12:47:15 +01:00
ieee802154
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-22 13:02:10 -07:00
ife
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ipv4
net: Fix incorrect address comparison when searching for a bind2 bucket
2022-09-28 18:52:17 -07:00
ipv6
net: shrink struct ubuf_info
2022-09-28 18:51:25 -07:00
iucv
net: keep sk->sk_forward_alloc as small as possible
2022-06-10 16:21:27 -07:00
kcm
kcm: fix strp_init() order and cleanup
2022-08-31 12:16:44 -07:00
key
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
2022-08-24 12:51:50 +01:00
l2tp
genetlink: start to validate reserved header bytes
2022-08-29 12:47:15 +01:00
l3mdev
…
lapb
…
llc
net: rename reference+tracking helpers
2022-06-09 21:52:55 -07:00
mac80211
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-29 14:30:51 -07:00
mac802154
net: mac802154: Fix a condition in the receive path
2022-08-29 11:10:22 +02:00
mctp
…
mpls
net: Use u64_stats_fetch_begin_irq() for stats fetch.
2022-08-29 13:02:27 +01:00
mptcp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-29 14:30:51 -07:00
ncsi
genetlink: start to validate reserved header bytes
2022-08-29 12:47:15 +01:00
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-22 13:02:10 -07:00
netlabel
genetlink: start to validate reserved header bytes
2022-08-29 12:47:15 +01:00
netlink
netlink: Bounds-check struct nlmsgerr creation
2022-09-05 14:45:22 +01:00
netrom
…
nfc
NFC: hci: Split memcpy() of struct hcp_message flexible array
2022-09-27 07:45:18 -07:00
nsh
…
openvswitch
net: openvswitch: allow conntrack in non-initial user namespace
2022-09-27 11:31:36 +02:00
packet
net/af_packet: registration process optimization in packet_init()
2022-09-21 12:59:22 +01:00
phonet
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psample
genetlink: start to validate reserved header bytes
2022-08-29 12:47:15 +01:00
qrtr
net: qrtr: start MHI channel after endpoit creation
2022-08-15 11:21:42 +01:00
rds
net: rds: add missing __init/__exit annotations to module init/exit funcs
2022-09-19 17:58:53 -07:00
rfkill
…
rose
rose: check NULL rose_loopback_neigh->loopback
2022-08-22 14:24:54 +01:00
rxrpc
rxrpc: remove rxrpc_max_call_lifetime declaration
2022-09-19 17:58:47 -07:00
sched
net: sched: cls_u32: Avoid memcpy() false-positive warning
2022-09-29 18:44:07 -07:00
sctp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-07-28 18:21:16 -07:00
smc
net/smc: Support SO_REUSEPORT
2022-09-27 10:26:17 +02:00
strparser
strparser: pad sk_skb_cb to avoid straddling cachelines
2022-07-08 18:38:44 -07:00
sunrpc
NFS client bugfixes for Linux 6.0
2022-09-12 17:53:46 -04:00
switchdev
net: rename reference+tracking helpers
2022-06-09 21:52:55 -07:00
tipc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-08 18:38:30 +02:00
tls
net: tls: Add ARIA-GCM algorithm
2022-09-27 17:29:09 -07:00
unix
af_unix: Refactor unix_read_skb()
2022-09-26 11:00:19 -07:00
vmw_vsock
vsock/vmci: fix repeated words in comments
2022-09-16 09:31:29 +01:00
wireless
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-29 14:30:51 -07:00
x25
net/x25: fix call timeouts in blocking connects
2022-08-08 20:48:51 -07:00
xdp
xsk: Fix corrupted packets for XDP_SHARED_UMEM
2022-08-15 17:26:07 +02:00
xfrm
net: Fix data-races around netdev_max_backlog.
2022-08-24 13:46:57 +01:00
compat.c
net: clear msg_get_inq in __get_compat_msghdr()
2022-09-20 08:23:20 -07:00
devres.c
…
Kconfig
Remove DECnet support from kernel
2022-08-22 14:26:30 +01:00
Kconfig.debug
net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET
2022-09-20 14:23:56 -07:00
Makefile
Remove DECnet support from kernel
2022-08-22 14:26:30 +01:00
socket.c
net: Fix a data-race around sysctl_somaxconn.
2022-08-24 13:46:58 +01:00
sysctl_net.c
…