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linux-5.15.y
linux/net/ipv4
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Eric Dumazet 393525dee5 arp: do not assume dev_hard_header() does not change skb->head 
[ Upstream commit c92510f5e3 ]

arp_create() is the only dev_hard_header() caller
making assumption about skb->head being unchanged.

A recent commit broke this assumption.

Initialize @arp pointer after dev_hard_header() call.

Fixes: db5b4e39c4 ("ip6_gre: make ip6gre_header() robust")
Reported-by: syzbot+58b44a770a1585795351@syzkaller.appspotmail.com
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260107212250.384552-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-01-19 13:10:17 +01:00
..
bpfilter
…
netfilter
netfilter: nf_reject: don't reply to icmp error messages
2025-12-07 06:09:21 +09:00
af_inet.c
net: inet: do not leave a dangling sk pointer in inet_create()
2024-12-14 19:51:37 +01:00
ah4.c
…
arp.c
arp: do not assume dev_hard_header() does not change skb->head
2026-01-19 13:10:17 +01:00
bpf_tcp_ca.c
…
cipso_ipv4.c
…
datagram.c
…
devinet.c
ipv4: Fix NULL vs error pointer check in inet_blackhole_dev_init()
2025-09-09 18:50:19 +02:00
esp4_offload.c
…
esp4.c
…
fib_frontend.c
ipv4: fib: Move fib_valid_key_len() to rtm_to_fib_config().
2025-06-04 14:37:59 +02:00
fib_lookup.h
…
fib_notifier.c
…
fib_rules.c
ip: fib_rules: Fetch net from fib_rule in fib[46]_rule_configure().
2025-06-04 14:38:03 +02:00
fib_semantics.c
net: Add l3mdev index to flow struct and avoid oif reset for port devices
2024-10-17 15:11:57 +02:00
fib_trie.c
ipv4: Fix reference count leak when using error routes with nexthop objects
2026-01-19 13:09:58 +01:00
fou.c
fou: remove warn in gue_gro_receive on unsupported protocol
2024-12-14 19:51:46 +01:00
gre_demux.c
…
gre_offload.c
gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers
2024-09-12 11:07:47 +02:00
icmp.c
icmp: fix icmp_ndo_send address translation for reply direction
2025-09-09 18:50:18 +02:00
igmp.c
…
inet_connection_sock.c
tcp: Fix use-after-free of nreq in reqsk_timer_handler().
2024-12-14 19:51:10 +01:00
inet_diag.c
…
inet_fragment.c
inet: inet_defrag: prevent sk release while still in use
2024-10-17 15:10:41 +02:00
inet_hashtables.c
inet: Avoid ehash lookup race in inet_ehash_insert()
2026-01-19 13:09:23 +01:00
inet_timewait_sock.c
…
inetpeer.c
…
ip_forward.c
…
ip_fragment.c
inet: inet_defrag: prevent sk release while still in use
2024-10-17 15:10:41 +02:00
ip_gre.c
net: Handle l3mdev in ip_tunnel_init_flow
2024-10-17 15:12:01 +02:00
ip_input.c
…
ip_options.c
…
ip_output.c
ipv4: Fix uninit-value access in __ip_make_skb()
2026-01-19 13:10:12 +01:00
ip_sockglue.c
…
ip_tunnel_core.c
tunnels: reset the GSO metadata before reusing the skb
2025-10-02 13:39:02 +02:00
ip_tunnel.c
net/ip6_tunnel: Prevent perpetual tunnel growth
2025-10-29 14:03:08 +01:00
ip_vti.c
…
ipcomp.c
xfrm: delete x->tunnel as we delete x
2026-01-19 13:09:18 +01:00
ipconfig.c
…
ipip.c
…
ipmr_base.c
ipmr: do not call mr_mfc_uses_dev() for unres entries
2025-03-13 12:50:11 +01:00
ipmr.c
…
Kconfig
…
Makefile
…
metrics.c
…
netfilter.c
…
netlink.c
…
nexthop.c
net: When removing nexthops, don't call synchronize_net if it is not necessary
2025-12-07 06:09:19 +09:00
ping.c
inet: ping: Fix icmp out counting
2026-01-19 13:10:16 +01:00
proc.c
minmax: add a few more MIN_T/MAX_T users
2025-10-19 16:21:52 +02:00
protocol.c
…
raw_diag.c
…
raw.c
ipv4: Fix uninit-value access in __ip_make_skb()
2026-01-19 13:10:12 +01:00
route.c
ipv4: route: Prevent rt_bind_exception() from rebinding stale fnhe
2025-12-07 06:09:29 +09:00
syncookies.c
…
sysctl_net_ipv4.c
…
tcp_bbr.c
…
tcp_bic.c
…
tcp_bpf.c
tcp_bpf: Call sk_msg_free() when tcp_bpf_send_verdict() fails to allocate psock->cork.
2025-10-02 13:39:00 +02:00
tcp_cdg.c
…
tcp_cong.c
…
tcp_cubic.c
tcp_cubic: fix incorrect HyStart round start detection
2025-03-13 12:49:59 +01:00
tcp_dctcp.c
…
tcp_dctcp.h
…
tcp_diag.c
…
tcp_fastopen.c
…
tcp_highspeed.c
…
tcp_htcp.c
…
tcp_hybla.c
…
tcp_illinois.c
…
tcp_input.c
tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().
2025-10-19 16:21:41 +02:00
tcp_ipv4.c
tcp: avoid reusing FIN_WAIT2 when trying to find port in connect() process
2024-10-17 15:11:26 +02:00
tcp_lp.c
…
tcp_metrics.c
…
tcp_minisocks.c
tcp: Defer ts_recent changes until req is owned
2025-03-13 12:50:57 +01:00
tcp_nv.c
…
tcp_offload.c
net-timestamp: support TCP GSO case for a few missing flags
2025-03-13 12:51:07 +01:00
tcp_output.c
tcp: fix tcp_tso_should_defer() vs large RTT
2025-10-29 14:03:08 +01:00
tcp_rate.c
…
tcp_recovery.c
…
tcp_scalable.c
…
tcp_timer.c
tcp: fix race in tcp_write_err()
2024-08-19 05:44:56 +02:00
tcp_ulp.c
…
tcp_vegas.c
…
tcp_vegas.h
…
tcp_veno.c
…
tcp_westwood.c
…
tcp_yeah.c
…
tcp.c
tcp: fix __tcp_close() to only send RST when required
2025-10-19 16:21:33 +02:00
tunnel4.c
…
udp_bpf.c
…
udp_diag.c
…
udp_impl.h
…
udp_offload.c
udp: also consider secpath when evaluating ipsec use for checksumming
2025-08-28 16:24:16 +02:00
udp_tunnel_core.c
…
udp_tunnel_nic.c
udp_tunnel: use netdev_warn() instead of netdev_WARN()
2025-12-07 06:09:22 +09:00
udp_tunnel_stub.c
…
udp.c
udp: Fix memory accounting leak.
2025-10-19 16:21:27 +02:00
udplite.c
…
xfrm4_input.c
…
xfrm4_output.c
…
xfrm4_policy.c
xfrm: respect ip protocols rules criteria when performing dst lookups
2024-11-01 01:52:36 +01:00
xfrm4_protocol.c
…
xfrm4_state.c
…
xfrm4_tunnel.c
…