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Thomas Weißschuh 92b8881bf7 net: avoid build bug in skb extension length calculation 
commit d6e5794b06c0fab74fe6e4fa55d508a5ceb14735 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2024-01-01 12:42:42 +00:00
..
6lowpan 6lowpan: Remove redundant initialisation. 2023-03-29 08:22:52 +01:00
9p net: 9p: avoid freeing uninit memory in p9pdu_vreadf 2024-01-01 12:42:41 +00:00
802
…
8021q net: check vlan filter feature in vlan_vids_add_by_dev() and vlan_vids_del_by_dev() 2024-01-01 12:42:32 +00:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:01:50 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 17:01:48 +01:00
ax25 ax25: Kconfig: Update link for linux-ax25.org 2023-09-18 12:56:58 +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: Add more enc key size check 2024-01-01 12:42:41 +00:00
bpf bpf: Prevent inlining of bpf_fentry_test7() 2023-08-30 08:36:17 +02:00
bpfilter net: Use umd_cleanup_helper() 2023-05-31 13:06:57 +02:00
bridge netfilter: nf_conntrack_bridge: initialize err to 0 2023-11-28 17:19:52 +00:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can can: isotp: isotp_sendmsg(): fix TX state detection and wait behavior 2023-10-06 12:54:33 +02:00
ceph libceph: use kernel_connect() 2023-10-09 13:35:24 +02:00
core net: avoid build bug in skb extension length calculation 2024-01-01 12:42:42 +00:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses. 2023-11-20 11:59:35 +01:00
devlink devlink: Hold devlink lock on health reporter dump get 2023-10-06 15:56:46 -07:00
dns_resolver keys, dns: Allow key types (eg. DNS) to be reclaimed immediately on expiry 2024-01-01 12:42:33 +00:00
dsa net: dsa: mark parsed interface mode for legacy switch drivers 2023-08-09 13:08:09 -07:00
ethernet
…
ethtool ethtool: don't propagate EOPNOTSUPP from dumps 2023-12-08 08:52:23 +01:00
handshake net/handshake: fix file ref count in handshake_nl_accept_doit() 2023-10-23 10:19:33 -07:00
hsr hsr: Prevent use after free in prp_create_tagged_frame() 2023-11-20 11:59:34 +01:00
ieee802154 sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:42:30 +00:00
ipv4 net: Remove acked SYN flag from packet in the transmit queue correctly 2023-12-20 17:01:49 +01:00
ipv6 net/ipv6: Revert remove expired routes with a separated list of routes 2024-01-01 12:42:33 +00:00
iucv net/iucv: Fix size of interrupt data 2023-03-16 17:34:40 -07:00
kcm kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg(). 2023-09-14 10:43:51 +02:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp udp: annotate data-races around udp->encap_type 2023-11-20 11:58:56 +01:00
l3mdev
…
lapb
…
llc llc: verify mac len before reading mac header 2023-11-20 11:59:34 +01:00
mac80211 wifi: mac80211: mesh_plink: fix matches_local logic 2024-01-01 12:42:27 +00:00
mac802154 Core WPAN changes: 2023-06-24 15:41:46 -07:00
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: fix setsockopt(IP_TOS) subflow locking 2023-11-28 17:20:14 +00:00
ncsi Revert ncsi: Propagate carrier gain/loss events to the NCSI controller 2023-11-28 17:20:10 +00:00
netfilter netfilter: nft_set_pipapo: skip inactive elements during set walk 2023-12-13 18:45:35 +01:00
netlabel netlabel: Remove unused declaration netlbl_cipsov4_doi_free() 2023-08-02 12:28:22 -07:00
netlink drop_monitor: Require 'CAP_SYS_ADMIN' when joining "events" group 2023-12-13 18:45:10 +01:00
netrom netrom: Deny concurrent connect(). 2023-08-28 06:58:46 +01:00
nfc nfc: nci: fix possible NULL pointer dereference in send_acknowledge() 2023-10-16 17:34:53 -07:00
nsh net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
openvswitch net/sched: act_ct: Always fill offloading tuple iifidx 2023-11-20 11:59:37 +01:00
packet packet: Move reference count in packet_sock to atomic_long_t 2023-12-13 18:45:23 +01:00
phonet sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:45:10 +01:00
qrtr net: qrtr: Handle IPCR control port format of older targets 2023-07-17 09:02:30 +01:00
rds net: prevent address rewrite in kernel_bind() 2023-10-01 19:31:29 +01:00
rfkill net: rfkill: gpio: set GPIO direction 2024-01-01 12:42:41 +00:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:42:31 +00:00
rxrpc rxrpc: Fix some minor issues with bundle tracing 2023-12-20 17:01:55 +01:00
sched net/sched: act_ct: Take per-cb reference to tcf_ct_flow_table 2023-12-20 17:01:47 +01:00
sctp sctp: update hb timer immediately after users change hb_interval 2023-10-04 17:29:58 -07:00
smc net/smc: fix missing byte order conversion in CLC handshake 2023-12-13 18:45:11 +01:00
strparser
…
sunrpc SUNRPC: Revert 5f7fc5d69f 2024-01-01 12:42:26 +00:00
switchdev net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
tipc tipc: Fix kernel-infoleak due to uninitialized TLV value 2023-11-28 17:19:51 +00:00
tls net: tls, update curr on splice as well 2023-12-13 18:45:10 +01:00
unix bpf, sockmap: af_unix stream sockets need to hold ref for pair sock 2023-12-08 08:52:23 +01:00
vmw_vsock vsock/virtio: Fix unsigned integer wrap around in virtio_transport_has_space() 2023-12-20 17:01:50 +01:00
wireless wifi: cfg80211: fix certs build to not depend on file order 2024-01-01 12:42:39 +00:00
x25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
xdp xsk: Skip polling event check for unbound socket 2023-12-13 18:45:06 +01:00
xfrm ipsec-2023-10-17 2023-10-17 18:21:13 -07:00
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Kconfig.debug
…
Makefile net/handshake: Create a NETLINK service for handling handshake requests 2023-04-19 18:48:48 -07:00
compat.c net/compat: Update msg_control_is_user when setting a kernel pointer 2023-04-14 11:09:27 +01:00
devres.c
…
socket.c net: prevent address rewrite in kernel_bind() 2023-10-01 19:31:29 +01:00
sysctl_net.c sysctl: Add size to register_net_sysctl function 2023-08-15 15:26:17 -07:00