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Ido Schimmel d10bd910d3 ipv6: Do not consider link down nexthops in path selection 
[ Upstream commit 8b8e0dd357165e0258d9f9cdab5366720ed2f619 ]

Nexthops whose link is down are not supposed to be considered during
path selection when the "ignore_routes_with_linkdown" sysctl is set.
This is done by assigning them a negative region boundary.

However, when comparing the computed hash (unsigned) with the region
boundary (signed), the negative region boundary is treated as unsigned,
resulting in incorrect nexthop selection.

Fix by treating the computed hash as signed. Note that the computed hash
is always in range of [0, 2^31 - 1].

Fixes: 3d709f69a3 ("ipv6: Use hash-threshold instead of modulo-N")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250402114224.293392-3-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-04-10 14:33:41 +02:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p 9p/xen: fix release of IRQ 2024-12-14 19:54:08 +01:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:34:38 +01:00
8021q vlan: enforce underlying device type 2025-03-13 12:53:18 +01:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:00:19 +01:00
atm atm: Fix NULL pointer dereference 2025-04-07 10:05:45 +02:00
ax25 ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt 2025-02-21 13:49:56 +01:00
batman-adv batman-adv: Ignore own maximum aggregation size during RX 2025-03-28 21:59:01 +01:00
bluetooth Bluetooth: Fix error code in chan_alloc_skb_cb() 2025-03-28 21:59:00 +01:00
bpf bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() 2025-03-07 16:56:37 +01:00
bpfilter uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
bridge ipv4: Convert ip_route_input() to dscp_t. 2025-03-07 16:56:44 +01:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-17 08:50:24 +01:00
can can: statistics: use atomic access in hot path 2025-04-10 14:33:39 +02:00
ceph libceph: fix race between delayed_work() and ceph_monc_stop() 2024-07-18 13:18:41 +02:00
core rtnetlink: Allocate vfinfo size for VF GUIDs when supported 2025-04-10 14:33:37 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 12:08:17 +02:00
dccp net: fix data-races around sk->sk_forward_alloc 2025-01-23 17:17:17 +01:00
devlink devlink: bump the instance index directly when iterating 2024-10-22 15:56:43 +02:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:27:38 -08:00
dsa net: dsa: fix netdev_priv() dereference before check on non-DSA netdevice events 2025-02-21 13:50:11 +01:00
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:29:29 +02:00
ethtool net: avoid race between device unregistration and ethnl ops 2025-02-21 13:49:06 +01:00
hsr net: hsr: fix fill_frame_info() regression vs VLAN packets 2025-02-21 13:49:23 +01:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 19:54:41 +01:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:38:56 +00:00
ipv4 net: fix geneve_opt length integer overflow 2025-04-10 14:33:41 +02:00
ipv6 ipv6: Do not consider link down nexthops in path selection 2025-04-10 14:33:41 +02:00
iucv s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() 2024-12-14 19:53:50 +01:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-08-29 17:30:44 +02:00
key net: af_key: fix sadb_x_filter validation 2023-08-23 17:52:32 +02:00
l2tp genetlink: hold RCU in genlmsg_mcast() 2024-11-01 01:56:00 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: do not use skb_get() before dev_queue_xmit() 2025-03-13 12:53:17 +01:00
mac80211 wifi: mac80211: prohibit deactivating all links 2025-02-21 13:49:03 +01:00
mac802154 mac802154: check local interfaces before deleting sdata list 2025-01-23 17:17:11 +01:00
mctp net: mctp: handle skb cleanup on sock_queue failures 2025-01-09 13:29:57 +01:00
mpls net: mpls: error out if inner headers are not set 2024-04-13 13:05:27 +02:00
mptcp mptcp: Fix data stream corruption in the address announcement 2025-03-28 21:59:01 +01:00
ncsi net/ncsi: use dev_set_mac_address() for Get MC MAC Address handling 2025-02-21 13:49:54 +01:00
netfilter net: fix geneve_opt length integer overflow 2025-04-10 14:33:41 +02:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:27:20 -08:00
netlink sock_diag: add module pointer to "struct sock_diag_handler" 2024-12-14 19:53:32 +01:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:30:01 +01:00
nfc NFC: nci: Add bounds checking in nci_hci_create_pipe() 2025-02-21 13:49:51 +01:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 11:55:59 +02:00
openvswitch tunnels: Accept PACKET_HOST in skb_tunnel_check_pmtu(). 2025-04-10 14:33:40 +02:00
packet af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK 2025-01-09 13:30:02 +01:00
phonet phonet: fix rtm_phonet_notify() skb allocation 2024-05-17 11:56:12 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:39:11 +01:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-10-17 15:21:13 +02:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-08-29 17:30:20 +02:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-14 19:53:33 +01:00
rose net: rose: lock the socket in rose_bind() 2025-02-21 13:49:37 +01:00
rxrpc rxrpc: Improve setsockopt() handling of malformed user input 2024-12-14 19:53:52 +01:00
sched net: fix geneve_opt length integer overflow 2025-04-10 14:33:41 +02:00
sctp sctp: Fix undefined behavior in left shift operation 2025-03-28 21:58:52 +01:00
smc net/smc: fix data error when recvmsg with MSG_PEEK flag 2025-02-21 13:49:03 +01:00
strparser strparser: Add read_sock callback 2025-03-07 16:56:37 +01:00
sunrpc sunrpc: suppress warnings for unused procfs functions 2025-03-07 16:56:42 +01:00
switchdev net: switchdev: Convert blocking notification chain to a raw one 2025-03-28 21:58:49 +01:00
tipc tipc: re-order conditions in tipc_crypto_key_rcv() 2025-02-21 13:49:33 +01:00
tls tls: Fix tls_sw_sendmsg error handling 2025-01-17 13:34:39 +01:00
unix sock_diag: add module pointer to "struct sock_diag_handler" 2024-12-14 19:53:32 +01:00
vmw_vsock vsock: avoid timeout during connect() if the socket is closing 2025-04-10 14:33:40 +02:00
wireless wifi: cfg80211: cancel wiphy_work before freeing wiphy 2025-03-28 21:58:48 +01:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:20:42 -04:00
xdp xsk: fix an integer overflow in xp_create_and_assign_umem() 2025-03-28 21:59:01 +01:00
xfrm xfrm_output: Force software GSO only in tunnel mode 2025-03-28 21:58:59 +01:00
compat.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig Remove DECnet support from kernel 2022-08-22 14:26:30 +01:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile devlink: move code to a dedicated directory 2023-08-30 16:11:00 +02:00
socket.c net: explicitly clear the sk pointer, when pf->create fails 2024-10-17 15:22:27 +02:00
sysctl_net.c sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00