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9f08bb6500
android_kernel_samsung_sm8650/net
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Marcelo Ricardo Leitner 9f08bb6500 sctp: fail if no bound addresses can be used for a given scope 
[ Upstream commit 458e279f861d3f61796894cd158b780765a1569f ]

Currently, if you bind the socket to something like:
        servaddr.sin6_family = AF_INET6;
        servaddr.sin6_port = htons(0);
        servaddr.sin6_scope_id = 0;
        inet_pton(AF_INET6, "::1", &servaddr.sin6_addr);

And then request a connect to:
        connaddr.sin6_family = AF_INET6;
        connaddr.sin6_port = htons(20000);
        connaddr.sin6_scope_id = if_nametoindex("lo");
        inet_pton(AF_INET6, "fe88::1", &connaddr.sin6_addr);

What the stack does is:
 - bind the socket
 - create a new asoc
 - to handle the connect
   - copy the addresses that can be used for the given scope
   - try to connect

But the copy returns 0 addresses, and the effect is that it ends up
trying to connect as if the socket wasn't bound, which is not the
desired behavior. This unexpected behavior also allows KASLR leaks
through SCTP diag interface.

The fix here then is, if when trying to copy the addresses that can
be used for the scope used in connect() it returns 0 addresses, bail
out. This is what TCP does with a similar reproducer.

Reported-by: Pietro Borrello <borrello@diag.uniroma1.it>
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/9fcd182f1099f86c6661f3717f63712ddd1c676c.1674496737.git.marcelo.leitner@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-02-01 08:34:46 +01:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p 9p/client: fix data race on req->status 2023-01-12 12:02:36 +01:00
802 mrp: introduce active flags to prevent UAF when applicant uninit 2022-12-31 13:33:02 +01:00
8021q net: gro: skb_gro_header helper function 2022-08-25 10:33:21 +02:00
appletalk net: remove noblock parameter from skb_recv_datagram() 2022-04-06 13:45:26 +01:00
atm net/atm: fix proc_mpc_write incorrect return value 2022-10-15 11:08:36 +01:00
ax25 ax25: move from strlcpy with unused retval to strscpy 2022-08-22 17:55:50 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-09-22 13:02:10 -07:00
bluetooth Bluetooth: hci_sync: cancel cmd_timer if hci_open failed 2023-02-01 08:34:35 +01:00
bpf bpf: Move skb->len == 0 checks into __bpf_redirect 2022-12-31 13:32:14 +01:00
bpfilter uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
bridge bridge: switchdev: Fix memory leaks when changing VLAN protocol 2022-11-15 13:38:11 +01:00
caif caif: fix memory leak in cfctrl_linkup_request() 2023-01-12 12:02:33 +01:00
can can: af_can: fix NULL pointer dereference in can_rcv_filter 2022-12-07 10:30:47 +01:00
ceph Random number generator fixes for Linux 6.1-rc1. 2022-10-16 15:27:07 -07:00
core net: fix UaF in netns ops registration error path 2023-02-01 08:34:43 +01:00
dcb net: dcb: disable softirqs in dcbnl_flush_dev() 2022-03-03 08:01:55 -08:00
dccp dccp/tcp: Fixup bhash2 bucket when connect() fails. 2022-11-22 20:15:37 -08:00
dns_resolver
dsa net: dsa: tag_8021q: avoid leaking ctx on dsa_tag_8021q_register() error path 2022-12-31 13:32:29 +01:00
ethernet net: gro: skb_gro_header helper function 2022-08-25 10:33:21 +02:00
ethtool net/ethtool/ioctl: return -EOPNOTSUPP if we have no phy stats 2023-01-24 07:24:31 +01:00
hsr hsr: Synchronize sequence number updates. 2022-12-31 13:32:22 +01:00
ieee802154 net: ieee802154: fix error return code in dgram_bind() 2022-10-07 09:29:17 +02:00
ife
ipv4 ipv4: prevent potential spectre v1 gadget in fib_metrics_match() 2023-02-01 08:34:45 +01:00
ipv6 ipv6: fix reachability confirmation with proxy_ndp 2023-02-01 08:34:39 +01:00
iucv net: keep sk->sk_forward_alloc as small as possible 2022-06-10 16:21:27 -07:00
kcm kcm: close race conditions on sk_receive_queue 2022-11-15 12:42:26 +01:00
key xfrm: Fix oops in __xfrm_state_delete() 2022-11-22 07:14:55 +01:00
l2tp l2tp: prevent lockdep issue in l2tp_tunnel_register() 2023-02-01 08:34:24 +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
llc net: rename reference+tracking helpers 2022-06-09 21:52:55 -07:00
mac80211 wifi: mac80211: Fix iTXQ AMPDU fragmentation handling 2023-02-01 08:34:36 +01:00
mac802154 mac802154: fix missing INIT_LIST_HEAD in ieee802154_if_add() 2022-12-05 09:53:08 +01:00
mctp mctp: Remove device type check at unregister 2022-12-31 13:32:56 +01:00
mpls net: Use u64_stats_fetch_begin_irq() for stats fetch. 2022-08-29 13:02:27 +01:00
mptcp mptcp: netlink: respect v4/v6-only sockets 2023-01-24 07:24:37 +01:00
ncsi genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
netfilter netfilter: conntrack: fix vtag checks for ABORT/SHUTDOWN_COMPLETE 2023-02-01 08:34:45 +01:00
netlabel genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
netlink netlink: annotate data races around sk_state 2023-02-01 08:34:45 +01:00
netrom netrom: Fix use-after-free of a listening socket. 2023-02-01 08:34:45 +01:00
nfc net: nfc: Fix use-after-free in local_cleanup() 2023-02-01 08:34:17 +01:00
nsh
openvswitch openvswitch: Use kmalloc_size_roundup() to match ksize() usage 2022-12-31 13:32:59 +01:00
packet packet: do not set TP_STATUS_CSUM_VALID on CHECKSUM_COMPLETE 2022-11-29 08:30:18 -08:00
phonet net: remove noblock parameter from recvmsg() entities 2022-04-12 15:00:25 +02:00
psample genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
qrtr net: qrtr: start MHI channel after endpoit creation 2022-08-15 11:21:42 +01:00
rds treewide: use get_random_{u8,u16}() when possible, part 2 2022-10-11 17:42:58 -06:00
rfkill rfkill: make new event layout opt-in 2022-03-18 13:09:17 +02:00
rose rose: Fix NULL pointer dereference in rose_send_frame() 2022-11-02 11:57:30 +00:00
rxrpc rxrpc: Fix missing unlock in rxrpc_do_sendmsg() 2022-12-31 13:32:55 +01:00
sched net/sched: sch_taprio: do not schedule in taprio_reset() 2023-02-01 08:34:46 +01:00
sctp sctp: fail if no bound addresses can be used for a given scope 2023-02-01 08:34:46 +01:00
smc net/smc: Fix possible leaked pernet namespace in smc_init() 2022-11-02 20:42:09 -07:00
strparser strparser: pad sk_skb_cb to avoid straddling cachelines 2022-07-08 18:38:44 -07:00
sunrpc Revert "SUNRPC: Use RMW bitops in single-threaded hot paths" 2023-01-14 10:33:42 +01:00
switchdev net: rename reference+tracking helpers 2022-06-09 21:52:55 -07:00
tipc tipc: fix unexpected link reset due to discovery messages 2023-01-18 11:58:24 +01:00
tls bpf, sockmap: Fix missing BPF_F_INGRESS flag when using apply_bytes 2022-12-31 13:32:20 +01:00
unix unix: Fix race in SOCK_SEQPACKET's unix_dgram_sendmsg() 2022-12-31 13:32:54 +01:00
vmw_vsock net: vmw_vsock: vmci: Check memcpy_from_msg() 2022-12-31 13:32:26 +01:00
wireless wifi: cfg80211: Fix not unregister reg_pdev when load_builtin_regdb_keys() fails 2022-12-31 13:32:20 +01:00
x25 net/x25: Fix skb leak in x25_lapb_receive_frame() 2022-11-15 20:22:19 -08:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-10-03 17:44:18 -07:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 2022-11-23 19:18:59 -08:00
compat.c net: clear msg_get_inq in __get_compat_msghdr() 2022-09-20 08:23:20 -07:00
devres.c
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 Remove DECnet support from kernel 2022-08-22 14:26:30 +01:00
socket.c d_path pile 2022-10-06 16:55:41 -07:00
sysctl_net.c