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Helge Deller fbe3970da1 ipv6: Ensure natural alignment of const ipv6 loopback and router addresses 
[ Upstream commit 60365049ccbacd101654a66ddcb299abfabd4fc5 ]

On a parisc64 kernel I sometimes notice this kernel warning:
Kernel unaligned access to 0x40ff8814 at ndisc_send_skb+0xc0/0x4d8

The address 0x40ff8814 points to the in6addr_linklocal_allrouters
variable and the warning simply means that some ipv6 function tries to
read a 64-bit word directly from the not-64-bit aligned
in6addr_linklocal_allrouters variable.

Unaligned accesses are non-critical as the architecture or exception
handlers usually will fix it up at runtime. Nevertheless it may trigger
a performance penality for some architectures. For details read the
"unaligned-memory-access" kernel documentation.

The patch below ensures that the ipv6 loopback and router addresses will
always be naturally aligned. This prevents the unaligned accesses for
all architectures.

Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: 034dfc5df99eb ("ipv6: export in6addr_loopback to modules")
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/r/ZbNuFM1bFqoH-UoY@p100
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-18 12:13:22 +01:00
..
ila Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
netfilter Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
addrconf.c net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX 2024-11-18 12:11:48 +01:00
addrconf_core.c ipv6: Ensure natural alignment of const ipv6 loopback and router addresses 2024-11-18 12:13:22 +01:00
addrlabel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
af_inet6.c ipv6: init the accept_queue's spinlocks in inet6_create 2024-11-18 12:13:01 +01:00
ah6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
anycast.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
calipso.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
datagram.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
esp6.c net: ipv6: fix return value check in esp_remove_trailer 2024-11-08 11:26:10 +01:00
esp6_offload.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exthdrs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exthdrs_core.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exthdrs_offload.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fib6_notifier.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fib6_rules.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fou6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
icmp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
inet6_connection_sock.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
inet6_hashtables.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_checksum.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_fib.c ipv6: fix potential NULL deref in fib6_add() 2024-11-18 12:11:38 +01:00
ip6_flowlabel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_gre.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_icmp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_input.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_offload.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_offload.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_output.c ipv6: avoid atomic fragment on GSO packets 2024-11-18 11:42:50 +01:00
ip6_tunnel.c ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv() 2024-11-18 12:13:21 +01:00
ip6_udp_tunnel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6_vti.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip6mr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ipcomp6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ipv6_sockglue.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mcast.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mcast_snoop.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mip6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ndisc.c net: change accept_ra_min_rtr_lft to affect all RA lifetimes 2024-11-08 11:25:47 +01:00
netfilter.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
output_core.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ping.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
proc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
protocol.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
raw.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
reassembly.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
route.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rpl.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rpl_iptunnel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
seg6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
seg6_hmac.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
seg6_iptunnel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
seg6_local.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sit.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
syncookies.c dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses. 2024-11-18 11:43:07 +01:00
sysctl_net_ipv6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
tcp_ipv6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
tcpv6_offload.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
tunnel6.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
udp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
udp_impl.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
udp_offload.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
udplite.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xfrm6_input.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xfrm6_output.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xfrm6_policy.c Revert "xfrm6: fix inet6_dev refcount underflow problem" 2024-11-17 19:38:30 +01:00
xfrm6_protocol.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xfrm6_state.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xfrm6_tunnel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00