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torvalds-linux/net/ipv4
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Eric Dumazet c92510f5e3 arp: do not assume dev_hard_header() does not change skb->head 
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: db5b4e39c4e6 ("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>
2026-01-08 09:04:24 -08:00
..
netfilter
netfilter: nf_reject: don't reply to icmp error messages
2025-09-11 15:40:55 +02:00
af_inet.c
net: factor-out _sk_charge() helper
2025-11-24 19:49:40 -08:00
ah4.c
…
arp.c
arp: do not assume dev_hard_header() does not change skb->head
2026-01-08 09:04:24 -08:00
bpf_tcp_ca.c
tcp: Pass flags to __tcp_send_ack
2025-03-17 13:56:38 +00:00
cipso_ipv4.c
ipv4: icmp: Pass IPv4 control block structure as an argument to __icmp_send()
2025-09-11 12:22:38 +02:00
datagram.c
net: Convert proto callbacks from sockaddr to sockaddr_unsized
2025-11-04 19:10:33 -08:00
devinet.c
ipv4: Fix NULL vs error pointer check in inet_blackhole_dev_init()
2025-09-03 16:58:44 -07:00
esp4_offload.c
xfrm: Determine inner GSO type from packet inner protocol
2025-10-30 11:52:31 +01:00
esp4.c
tcp: Don't pass hashinfo to socket lookup helpers.
2025-08-25 17:53:35 -07:00
fib_frontend.c
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
fib_lookup.h
…
fib_notifier.c
…
fib_rules.c
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
fib_semantics.c
net: fib: restore ECMP balance from loopback
2025-12-30 11:07:38 +01:00
fib_trie.c
ipv4: Fix reference count leak when using error routes with nexthop objects
2025-12-30 10:39:22 +01:00
fou_bpf.c
…
fou_core.c
net: gro: remove is_ipv6 from napi_gro_cb
2025-09-25 12:42:49 +02:00
fou_nl.c
tools: ynl-gen: add regeneration comment
2025-11-25 19:20:42 -08:00
fou_nl.h
tools: ynl-gen: add regeneration comment
2025-11-25 19:20:42 -08:00
gre_demux.c
net: ip_gre: Fix spelling mistake "demultiplexor" -> "demultiplexer"
2025-04-24 18:20:40 -07:00
gre_offload.c
…
icmp.c
ipv4: icmp: Add RFC 5837 support
2025-10-29 18:28:29 -07:00
igmp_internal.h
netlink: support dumping IPv4 multicast addresses
2025-02-11 11:26:53 +01:00
igmp.c
ipv4: adopt dst_dev, skb_dst_dev and skb_dst_dev_net[_rcu]
2025-07-02 14:32:30 -07:00
inet_connection_sock.c
tcp: remove icsk->icsk_retransmit_timer
2025-11-25 19:28:29 -08:00
inet_diag.c
tcp: introduce icsk->icsk_keepalive_timer
2025-11-25 19:28:29 -08:00
inet_fragment.c
inet: frags: drop fraglist conntrack references
2026-01-04 10:58:04 -08:00
inet_hashtables.c
inet: Avoid ehash lookup race in inet_ehash_insert()
2025-10-17 16:08:43 -07:00
inet_timewait_sock.c
inet: Avoid ehash lookup race in inet_twsk_hashdance_schedule()
2025-10-17 16:08:43 -07:00
inetpeer.c
inetpeer: use EXPORT_IPV6_MOD[_GPL]()
2025-02-14 13:09:39 -08:00
ip_forward.c
…
ip_fragment.c
inet: frags: flush pending skbs in fqdir_pre_exit()
2025-12-10 01:15:27 -08:00
ip_gre.c
erspan: Initialize options_len before referencing options.
2025-12-23 09:21:00 +01:00
ip_input.c
net: ipv4: Remove extern udp_v4_early_demux()/tcp_v4_early_demux() in .c files
2025-10-29 17:05:30 -07:00
ip_options.c
net: Switch to skb_dstref_steal/skb_dstref_restore for ip_route_input callers
2025-08-19 17:54:35 -07:00
ip_output.c
net: psp: don't assume reply skbs will have a socket
2025-10-03 10:23:50 -07:00
ip_sockglue.c
Networking changes for 6.14.
2025-01-22 08:28:57 -08:00
ip_tunnel_core.c
tunnels: reset the GSO metadata before reusing the skb
2025-09-09 13:03:33 +02:00
ip_tunnel.c
net/ip6_tunnel: Prevent perpetual tunnel growth
2025-10-13 17:43:46 -07:00
ip_vti.c
ipv4: adopt dst_dev, skb_dst_dev and skb_dst_dev_net[_rcu]
2025-07-02 14:32:30 -07:00
ipcomp.c
xfrm: delete x->tunnel as we delete x
2025-07-08 13:28:27 +02:00
ipconfig.c
net: ipconfig: Replace strncpy with strscpy in ic_proto_name
2025-11-28 20:19:16 -08:00
ipip.c
netfilter: flowtable: Add IPIP rx sw acceleration
2025-11-28 00:00:38 +00:00
ipmr_base.c
ipmr: do not call mr_mfc_uses_dev() for unres entries
2025-01-23 07:08:13 -08:00
ipmr.c
ipv4: start using dst_dev_rcu()
2025-08-29 19:36:32 -07:00
Kconfig
tcp: Convert tcp-md5 to use MD5 library instead of crypto_ahash
2025-10-17 17:14:54 -07:00
Makefile
…
metrics.c
…
netfilter.c
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
netlink.c
…
nexthop.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-09-25 11:00:59 -07:00
ping.c
inet: ping: Fix icmp out counting
2026-01-04 09:48:53 -08:00
proc.c
ipv4: snmp: do not use SNMP_MIB_SENTINEL anymore
2025-09-08 18:06:20 -07:00
protocol.c
…
raw_diag.c
inet_diag: change inet_diag_bc_sk() first argument
2025-08-29 19:29:24 -07:00
raw.c
net: Convert proto callbacks from sockaddr to sockaddr_unsized
2025-11-04 19:10:33 -08:00
route.c
ipv4: route: Prevent rt_bind_exception() from rebinding stale fnhe
2025-11-12 06:46:36 -08:00
syncookies.c
tcp: accecn: AccECN negotiation
2025-09-18 08:47:51 +02:00
sysctl_net_ipv4.c
tcp: add net.ipv4.tcp_rcvbuf_low_rtt
2025-11-20 17:44:23 -08:00
tcp_ao.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-09-18 11:26:06 -07:00
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.
2025-09-10 06:53:56 -07:00
tcp_cdg.c
tcp: cdg: remove redundant __GFP_NOWARN
2025-08-12 14:05:43 -07:00
tcp_cong.c
tcp: only release congestion control if it has been initialized
2024-10-31 18:22:48 -07:00
tcp_cubic.c
tcp_cubic: fix incorrect HyStart round start detection
2025-01-20 12:26:41 +00:00
tcp_dctcp.c
tcp: helpers for ECN mode handling
2025-03-17 13:54:11 +00:00
tcp_dctcp.h
tcp: Pass flags to __tcp_send_ack
2025-03-17 13:56:38 +00:00
tcp_diag.c
inet_diag: change inet_diag_bc_sk() first argument
2025-08-29 19:29:24 -07:00
tcp_fastopen.c
tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
2025-08-29 19:36:32 -07:00
tcp_highspeed.c
…
tcp_htcp.c
…
tcp_hybla.c
…
tcp_illinois.c
…
tcp_input.c
tcp: add net.ipv4.tcp_rcvbuf_low_rtt
2025-11-20 17:44:23 -08:00
tcp_ipv4.c
tcp: introduce icsk->icsk_keepalive_timer
2025-11-25 19:28:29 -08:00
tcp_lp.c
net: tcp_lp: fix kernel-doc warnings and update outdated reference links
2025-10-28 17:52:44 -07:00
tcp_metrics.c
Networking changes for 6.18.
2025-10-02 15:17:01 -07:00
tcp_minisocks.c
tcp: Don't reinitialise tw->tw_transparent in tcp_time_wait().
2025-11-18 18:00:38 -08:00
tcp_nv.c
…
tcp_offload.c
tcp: gro: inline tcp_gro_pull_header()
2025-11-14 18:00:08 -08:00
tcp_output.c
net/smc: bpf: Introduce generic hook for handshake flow
2025-11-10 11:19:41 -08:00
tcp_plb.c
…
tcp_rate.c
…
tcp_recovery.c
tcp: update the outdated ref draft-ietf-tcpm-rack
2025-07-08 09:01:52 -07:00
tcp_scalable.c
…
tcp_sigpool.c
…
tcp_timer.c
tcp: remove icsk->icsk_retransmit_timer
2025-11-25 19:28:29 -08:00
tcp_ulp.c
…
tcp_vegas.c
…
tcp_vegas.h
…
tcp_veno.c
…
tcp_westwood.c
…
tcp_yeah.c
…
tcp.c
net: do not write to msg_get_inq in callee
2026-01-08 08:45:13 -08:00
tunnel4.c
…
udp_bpf.c
…
udp_diag.c
inet_diag: change inet_diag_bc_sk() first argument
2025-08-29 19:29:24 -07:00
udp_impl.h
udp: move udp_memory_allocated into net_aligned_data
2025-07-02 14:22:02 -07:00
udp_offload.c
net: gro: remove is_ipv6 from napi_gro_cb
2025-09-25 12:42:49 +02:00
udp_tunnel_core.c
net: Convert proto_ops connect() callbacks to use sockaddr_unsized
2025-11-04 19:10:32 -08:00
udp_tunnel_nic.c
udp_tunnel: use netdev_warn() instead of netdev_WARN()
2025-09-11 19:09:48 -07:00
udp_tunnel_stub.c
…
udp.c
udp: call skb_orphan() before skb_attempt_defer_free()
2026-01-06 17:05:17 -08:00
udplite.c
udp: move udp_memory_allocated into net_aligned_data
2025-07-02 14:22:02 -07:00
xfrm4_input.c
xfrm: Set transport header to fix UDP GRO handling
2025-07-02 09:19:56 +02:00
xfrm4_output.c
ipv4: adopt dst_dev, skb_dst_dev and skb_dst_dev_net[_rcu]
2025-07-02 14:32:30 -07:00
xfrm4_policy.c
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
xfrm4_protocol.c
…
xfrm4_state.c
…
xfrm4_tunnel.c
…