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Code
2e87504692
linux/net
History
Eric Dumazet 2e87504692 sctp: initialize more fields in sctp_v6_from_sk() 
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>
2025-08-27 17:15:21 -07:00
..
6lowpan net: replace ND_PRINTK with dynamic debug 2025-07-10 15:27:32 -07:00
9p netfs: Fix the request's work item to not require a ref 2025-05-21 14:35:20 +02:00
802 treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
8021q net: s/dev_close_many/netif_close_many/ 2025-07-18 17:27:47 -07:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-07-24 11:10:46 -07:00
atm atm: atmtcp: Prevent arbitrary write in atmtcp_recv_control(). 2025-08-22 17:23:15 -07:00
ax25 treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
batman-adv This cleanup patchset includes the following patches: 2025-07-11 17:50:27 -07:00
bluetooth Bluetooth: hci_sync: fix set_local_name race condition 2025-08-22 13:57:31 -04:00
bpf bpf: Add attach_type field to bpf_link 2025-07-11 10:51:55 -07:00
bridge net: bridge: fix soft lockup in br_multicast_query_expired() 2025-08-14 17:49:33 -07:00
caif caif: reduce stack size, again 2025-06-23 16:58:43 -07:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-06-12 10:09:10 -07:00
ceph libceph: Rename hmac_sha256() to ceph_hmac_sha256() 2025-07-04 10:18:52 -07:00
core page_pool: fix incorrect mp_ops error handling 2025-08-22 15:52:02 -07:00
dcb dcb: Use rtnl_register_many(). 2024-10-15 18:52:26 -07:00
devlink devlink: let driver opt out of automatic phys_port_name generation 2025-08-12 13:23:39 -07:00
dns_resolver Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
dsa net: s/dev_close_many/netif_close_many/ 2025-07-18 17:27:47 -07:00
ethernet netkit: Fix pkt_type override upon netkit pass verdict 2024-05-25 10:48:57 -07:00
ethtool ethtool: rss: support removing contexts via Netlink 2025-07-21 18:21:19 -07:00
handshake net/handshake: Add new parameter 'HANDSHAKE_A_ACCEPT_KEYRING' 2025-07-08 15:31:44 +02:00
hsr net, hsr: reject HSR frame if skb can't hold tag 2025-08-20 19:31:25 -07:00
ieee802154 treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
ife net: sched: ife: fix potential use-after-free 2023-12-15 10:50:18 +00:00
ipv4 netfilter: nf_reject: don't leak dst refcount for loopback packets 2025-08-21 10:02:00 -07:00
ipv6 netfilter: nf_reject: don't leak dst refcount for loopback packets 2025-08-21 10:02:00 -07:00
iucv s390/drivers: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
kcm net: kcm: Fix race condition in kcm_unattach() 2025-08-13 18:18:33 -07:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-07-24 11:10:46 -07:00
l2tp net: annotate races around sk->sk_uid 2025-06-23 17:04:03 -07:00
l3mdev net: fib_rules: Fix iif / oif matching on L3 master device 2025-04-15 17:54:56 -07:00
lapb treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
llc net: make sk->sk_rcvtimeo lockless 2025-06-23 17:05:12 -07:00
mac80211 wifi: mac80211: fix WARN_ON for monitor mode on some devices 2025-07-23 12:29:07 +02:00
mac802154 mac802154: Switch to use hrtimer_setup() 2025-02-18 10:35:44 +01:00
mctp net: mctp: Fix bad kfree_skb in bind lookup test 2025-08-13 17:07:34 -07:00
mpls net: s/dev_get_flags/netif_get_flags/ 2025-07-18 17:27:47 -07:00
mptcp mptcp: disable add_addr retransmission when timeout is 0 2025-08-18 17:39:58 -07:00
ncsi net: ncsi: Fix buffer overflow in fetching version id 2025-06-12 18:21:59 -07:00
netfilter netfilter: nf_tables: reject duplicate device on updates 2025-08-13 08:34:55 +02:00
netlabel calipso: unlock rcu before returning -EAFNOSUPPORT 2025-06-05 08:03:38 -07:00
netlink netlink: avoid infinite retry looping in netlink_unicast() 2025-07-30 19:16:49 -07:00
netrom treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-06-19 13:00:24 -07:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-04-26 12:20:01 +02:00
openvswitch net: openvswitch: allow providing upcall pid for the 'execute' command 2025-07-07 14:30:39 -07:00
packet net/packet: fix a race in packet_set_ring() and packet_notifier() 2025-08-04 17:21:27 -07:00
phonet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-07-17 11:00:33 -07:00
psample psample: adjust size if rate_as_probability is set 2024-12-18 19:23:04 -08:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-09-24 10:48:16 +02:00
rds don't open-code kernel_accept() in rds_tcp_accept_one() 2025-07-15 16:19:54 -07:00
rfkill net: rfkill: gpio: allow booting in blocked state 2025-02-11 11:55:55 +01:00
rose net: rose: include node references in rose_neigh refcount 2025-08-27 07:43:09 -07:00
rxrpc rxrpc: Fix to use conn aborts for conn-wide failures 2025-07-17 07:50:48 -07:00
sched net/sched: Remove unnecessary WARNING condition for empty child qdisc in htb_activate 2025-08-20 19:27:08 -07:00
sctp sctp: initialize more fields in sctp_v6_from_sk() 2025-08-27 17:15:21 -07:00
shaper net: add netdev_lock() / netdev_unlock() helpers 2025-01-15 19:13:33 -08:00
smc net/smc: fix UAF on smcsk after smc_listen_out() 2025-08-19 18:27:16 -07:00
strparser net: make sk->sk_rcvtimeo lockless 2025-06-23 17:05:12 -07:00
sunrpc nfsd-6.17 fixes: 2025-08-11 07:38:55 -07:00
switchdev net: switchdev: Convert blocking notification chain to a raw one 2025-03-11 11:30:28 +01:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-07-10 10:10:49 -07:00
tls tls: fix handling of zero-length records on the rx_list 2025-08-21 07:52:30 -07:00
unix Networking changes for 6.17. 2025-07-30 08:58:55 -07:00
vmw_vsock vsock/virtio: Fix message iterator handling on transmit path 2025-08-21 17:49:19 -07:00
wireless Another wireless update: 2025-07-24 17:25:42 -07:00
x25 net/x25: Remove unused x25_terminate_link() 2025-07-14 17:19:13 -07:00
xdp net: xsk: introduce XDP_MAX_TX_SKB_BUDGET setsockopt 2025-07-10 14:48:29 +02:00
xfrm xfrm: bring back device check in validate_xmit_xfrm 2025-08-07 08:07:01 +02:00
compat.c file: stop exposing receive_fd_user() 2023-12-12 14:24:14 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig net: Kconfig: add endif/endmenu comments 2025-07-22 18:17:23 -07:00
Kconfig.debug rtnetlink: Add per-netns RTNL. 2024-10-08 15:16:59 +02:00
Makefile net: Retire DCCP socket. 2025-04-11 18:58:10 -07:00
socket.c net: annotate races around sk->sk_uid 2025-06-23 17:04:03 -07:00
sysctl_net.c sysctl: Remove check for sentinel element in ctl_table arrays 2024-06-13 10:50:52 +02:00