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Eric Dumazet 65b4693d8b sctp: initialize more fields in sctp_v6_from_sk() 
[ Upstream commit 2e8750469242cad8f01f320131fd5a6f540dbb99 ]

syzbot found that sin6_scope_id was not properly initialized,
leading to undefined behavior.

Clear sin6_scope_id and sin6_flowinfo.

BUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649
  __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649
  sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983
  sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390
  sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452
  sctp_get_port net/sctp/socket.c:8523 [inline]
  sctp_listen_start net/sctp/socket.c:8567 [inline]
  sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636
  __sys_listen_socket net/socket.c:1912 [inline]
  __sys_listen net/socket.c:1927 [inline]
  __do_sys_listen net/socket.c:1932 [inline]
  __se_sys_listen net/socket.c:1930 [inline]
  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930
  x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51
  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
  do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable addr.i.i created at:
  sctp_get_port net/sctp/socket.c:8515 [inline]
  sctp_listen_start net/sctp/socket.c:8567 [inline]
  sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636
  __sys_listen_socket net/socket.c:1912 [inline]
  __sys_listen net/socket.c:1927 [inline]
  __do_sys_listen net/socket.c:1932 [inline]
  __se_sys_listen net/socket.c:1930 [inline]
  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: syzbot+e69f06a0f30116c68056@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/68adc0a2.050a0220.37038e.00c4.GAE@google.com/T/#u
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20250826141314.1802610-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-09-04 15:26:29 +02:00
..
6lowpan
9p 9p/net: fix improper handling of bogus negative read/write replies 2025-05-02 07:47:04 +02:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:34:38 +01:00
8021q net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime 2025-07-24 08:51:53 +02:00
appletalk net: appletalk: Fix use-after-free in AARP proxy probe 2025-08-15 12:04:47 +02:00
atm atm: atmtcp: Prevent arbitrary write in atmtcp_recv_control(). 2025-09-04 15:26:27 +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: hci_sync: fix set_local_name race condition 2025-09-04 15:26:27 +02:00
bpf bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() 2025-03-07 16:56:37 +01:00
bpfilter
bridge net: bridge: fix soft lockup in br_multicast_query_expired() 2025-08-28 16:26:17 +02:00
caif caif: reduce stack size, again 2025-08-15 12:04:56 +02:00
can can: bcm: add missing rcu read protection for procfs content 2025-06-04 14:40:20 +02:00
ceph
core net: gso: Forbid IPv6 TSO with extensions on devices with only IPV6_CSUM 2025-08-28 16:26:17 +02:00
dcb
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
dsa net: dsa: tag_brcm: legacy: fix pskb_may_pull length 2025-06-27 11:07:17 +01:00
ethernet
ethtool net: ethtool: Don't call .cleanup_data when prepare_data fails 2025-04-25 10:43:25 +02:00
hsr net, hsr: reject HSR frame if skb can't hold tag 2025-08-28 16:26:09 +02:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 19:54:41 +01:00
ife
ipv4 net: ipv4: fix regression in local-broadcast routes 2025-09-04 15:26:26 +02:00
ipv6 netfilter: nf_reject: don't leak dst refcount for loopback packets 2025-08-28 16:26:19 +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
l2tp genetlink: hold RCU in genlmsg_mcast() 2024-11-01 01:56:00 +01:00
l3mdev
lapb
llc llc: fix data loss when reading from a socket in llc_ui_recvmsg() 2025-06-04 14:40:21 +02:00
mac80211 wifi: mac80211: check basic rates validity in sta_link_apply_parameters 2025-08-28 16:26:16 +02:00
mac802154 mac802154: check local interfaces before deleting sdata list 2025-01-23 17:17:11 +01:00
mctp net: mctp: Prevent duplicate binds 2025-08-28 16:25:55 +02:00
mpls mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). 2025-06-27 11:07:39 +01:00
mptcp mptcp: disable add_addr retransmission when timeout is 0 2025-08-28 16:26:16 +02:00
ncsi net: ncsi: Fix buffer overflow in fetching version id 2025-08-28 16:25:58 +02:00
netfilter netfilter: ctnetlink: fix refcount leak on table dump 2025-08-28 16:25:51 +02:00
netlabel calipso: unlock rcu before returning -EAFNOSUPPORT 2025-06-27 11:07:25 +01:00
netlink netlink: avoid infinite retry looping in netlink_unicast() 2025-08-28 16:25:48 +02:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:30:01 +01:00
nfc NFC: nci: uart: Set tty->disc_data only in success path 2025-06-27 11:07:29 +01:00
nsh
openvswitch net: openvswitch: Fix the dead loop of MPLS parse 2025-06-27 11:07:12 +01:00
packet net/packet: fix a race in packet_set_ring() and packet_notifier() 2025-08-15 12:05:11 +02:00
phonet phonet/pep: Move call to pn_skb_get_dst_sockaddr() earlier in pep_sock_accept() 2025-07-24 08:51:48 +02:00
psample
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: include node references in rose_neigh refcount 2025-09-04 15:26:29 +02:00
rxrpc rxrpc: Fix oops due to non-existence of prealloc backlog struct 2025-07-17 18:32:06 +02:00
sched net/sched: Remove unnecessary WARNING condition for empty child qdisc in htb_activate 2025-08-28 16:26:18 +02:00
sctp sctp: initialize more fields in sctp_v6_from_sk() 2025-09-04 15:26:29 +02:00
smc net/smc: use the correct ndev to find pnetid by pnetid table 2025-06-04 14:40:06 +02:00
strparser strparser: Add read_sock callback 2025-03-07 16:56:37 +01:00
sunrpc SUNRPC: rpcbind should never reset the port to the value '0' 2025-06-04 14:40:03 +02:00
switchdev net: switchdev: Convert blocking notification chain to a raw one 2025-03-28 21:58:49 +01:00
tipc tipc: Fix use-after-free in tipc_conn_close(). 2025-07-17 18:32:05 +02:00
tls tls: fix handling of zero-length records on the rx_list 2025-08-28 16:26:16 +02:00
unix af_unix: Don't set -ECONNRESET for consumed OOB skb. 2025-07-06 10:58:00 +02:00
vmw_vsock vsock/virtio: Validate length in packet header before skb_put() 2025-08-28 16:26:07 +02:00
wireless wifi: cfg80211: reject HTC bit for management frames 2025-08-28 16:25:55 +02:00
x25
xdp xsk: fix an integer overflow in xp_create_and_assign_umem() 2025-03-28 21:59:01 +01:00
xfrm xfrm: interface: fix use-after-free after changing collect_md xfrm interface 2025-08-15 12:04:46 +02:00
compat.c
devres.c
Kconfig
Kconfig.debug
Makefile af_unix: Remove CONFIG_UNIX_SCM. 2025-06-04 14:40:23 +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