linux/net
Thomas Weißschuh d6e5794b06 net: avoid build bug in skb extension length calculation
GCC seems to incorrectly fail to evaluate skb_ext_total_length() at
compile time under certain conditions.

The issue even occurs if all values in skb_ext_type_len[] are "0",
ruling out the possibility of an actual overflow.

As the patch has been in mainline since v6.6 without triggering the
problem it seems to be a very uncommon occurrence.

As the issue only occurs when -fno-tree-loop-im is specified as part of
CFLAGS_GCOV, disable the BUILD_BUG_ON() only when building with coverage
reporting enabled.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312171924.4FozI5FG-lkp@intel.com/
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/lkml/487cfd35-fe68-416f-9bfd-6bb417f98304@app.fastmail.com/
Fixes: 5d21d0a65b ("net: generalize calculation of skb extensions length")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20231218-net-skbuff-build-bug-v1-1-eefc2fb0a7d3@weissschuh.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2023-12-21 08:09:40 +01:00
..
6lowpan
9p 9p/net: fix possible memory leak in p9_check_errors() 2023-10-27 12:44:13 +09:00
802 net: fill in MODULE_DESCRIPTION()s under net/802* 2023-10-28 11:29:28 +01:00
8021q net: check vlan filter feature in vlan_vids_add_by_dev() and vlan_vids_del_by_dev() 2023-12-19 13:13:56 +01:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-14 12:02:45 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-12 13:14:08 +01:00
ax25 net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-24 10:51:39 -07:00
bluetooth Bluetooth: af_bluetooth: Fix Use-After-Free in bt_sock_recvmsg 2023-12-15 11:54:18 -05:00
bpf bpf: Add __bpf_kfunc_{start,end}_defs macros 2023-11-01 22:33:53 -07:00
bpfilter
bridge netfilter: nf_conntrack_bridge: initialize err to 0 2023-11-14 16:16:21 +01:00
caif
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-12 17:07:34 -07:00
ceph This update includes the following changes: 2023-11-02 16:15:30 -10:00
core net: avoid build bug in skb extension length calculation 2023-12-21 08:09:40 +01:00
dcb
dccp dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses. 2023-11-02 12:56:03 +01:00
devlink netlink: specs: devlink: add forgotten port function caps enum values 2023-11-01 22:13:43 -07:00
dns_resolver
dsa net: dsa: Rename IFLA_DSA_MASTER to IFLA_DSA_CONDUIT 2023-10-24 13:08:14 -07:00
ethernet
ethtool ethtool: don't propagate EOPNOTSUPP from dumps 2023-11-29 08:43:27 -08:00
handshake Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-26 13:46:28 -07:00
hsr hsr: Prevent use after free in prp_create_tagged_frame() 2023-11-01 22:26:04 -07:00
ieee802154 sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
ife net: sched: ife: fix potential use-after-free 2023-12-15 10:50:18 +00:00
ipv4 Revert "tcp: disable tcp_autocorking for socket when TCP_NODELAY flag is set" 2023-12-13 10:58:54 -08:00
ipv6 net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX 2023-12-08 10:40:51 +00:00
iucv s390: use control register bit defines 2023-09-19 13:26:57 +02:00
kcm net: kcm: fill in MODULE_DESCRIPTION() 2023-11-08 18:17:44 -08:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-05 13:16:47 -07:00
l3mdev
lapb
llc llc: verify mac len before reading mac header 2023-11-01 22:21:32 -07:00
mac80211 wifi: mac80211: mesh_plink: fix matches_local logic 2023-12-12 10:14:57 +01:00
mac802154
mctp mctp: perform route lookups under a RCU read-side lock 2023-10-10 19:43:22 -07:00
mpls networking: Update to register_net_sysctl_sz 2023-08-15 15:26:18 -07:00
mptcp mptcp: fill in missing MODULE_DESCRIPTION() 2023-12-17 20:54:22 +00:00
ncsi Revert ncsi: Propagate carrier gain/loss events to the NCSI controller 2023-11-15 09:59:44 +00:00
netfilter netfilter: xt_owner: Fix for unsafe access of sk->sk_socket 2023-12-06 17:52:15 +01:00
netlabel
netlink drop_monitor: Require 'CAP_SYS_ADMIN' when joining "events" group 2023-12-07 09:54:02 -08:00
netrom net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
nfc nfc: nci: fix possible NULL pointer dereference in send_acknowledge() 2023-10-16 17:34:53 -07:00
nsh
openvswitch net/sched: act_ct: Always fill offloading tuple iifidx 2023-11-08 17:47:08 -08:00
packet packet: Move reference count in packet_sock to atomic_long_t 2023-12-04 14:45:04 -08:00
phonet
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-07 09:54:02 -08:00
qrtr
rds net: prevent address rewrite in kernel_bind() 2023-10-01 19:31:29 +01:00
rfkill net: rfkill: gpio: set GPIO direction 2023-12-12 10:14:57 +01:00
rose net/rose: fix races in rose_kill_by_device() 2023-12-15 11:59:53 +00:00
rxrpc rxrpc: Defer the response to a PING ACK until we've parsed it 2023-11-17 02:50:33 +00:00
sched net/sched: act_ct: Take per-cb reference to tcf_ct_flow_table 2023-12-11 09:59:58 +00:00
sctp net: fill in MODULE_DESCRIPTION()s for SOCK_DIAG modules 2023-11-19 20:09:13 +00:00
smc net/smc: fix missing byte order conversion in CLC handshake 2023-12-07 10:10:56 -08:00
strparser
sunrpc NFS client updates for Linux 6.7 2023-11-08 13:39:16 -08:00
switchdev
tipc net: fill in MODULE_DESCRIPTION()s for SOCK_DIAG modules 2023-11-19 20:09:13 +00:00
tls net: tls, update curr on splice as well 2023-12-07 09:52:28 -08:00
unix bpf, sockmap: af_unix stream sockets need to hold ref for pair sock 2023-11-30 00:25:16 +01:00
vmw_vsock vsock/virtio: Fix unsigned integer wrap around in virtio_transport_has_space() 2023-12-13 17:59:08 -08:00
wireless wifi: cfg80211: fix certs build to not depend on file order 2023-12-14 09:11:51 +01:00
x25 net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
xdp xsk: Skip polling event check for unbound socket 2023-12-05 13:43:43 +01:00
xfrm Including fixes from netfilter and bpf. 2023-11-09 17:09:35 -08:00
compat.c
devres.c
Kconfig net: add skb_segment kunit test 2023-10-11 10:39:01 +01:00
Kconfig.debug
Makefile
socket.c bpf: Add __bpf_hook_{start,end} macros 2023-11-01 22:33:53 -07:00
sysctl_net.c sysctl: Add size to register_net_sysctl function 2023-08-15 15:26:17 -07:00