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platform_kernel-5.15
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Xin Long 5a4da2e233 sctp: check asoc strreset_chunk in sctp_generate_reconf_event 
[ Upstream commit 165e3e17fe8fe6a8aab319bc6e631a2e23b9a857 ]

A null pointer reference issue can be triggered when the response of a
stream reconf request arrives after the timer is triggered, such as:

  send Incoming SSN Reset Request --->
  CPU0:
   reconf timer is triggered,
   go to the handler code before hold sk lock
                            <--- reply with Outgoing SSN Reset Request
  CPU1:
   process Outgoing SSN Reset Request,
   and set asoc->strreset_chunk to NULL
  CPU0:
   continue the handler code, hold sk lock,
   and try to hold asoc->strreset_chunk, crash!

In Ying Xu's testing, the call trace is:

  [ ] BUG: kernel NULL pointer dereference, address: 0000000000000010
  [ ] RIP: 0010:sctp_chunk_hold+0xe/0x40 [sctp]
  [ ] Call Trace:
  [ ]  <IRQ>
  [ ]  sctp_sf_send_reconf+0x2c/0x100 [sctp]
  [ ]  sctp_do_sm+0xa4/0x220 [sctp]
  [ ]  sctp_generate_reconf_event+0xbd/0xe0 [sctp]
  [ ]  call_timer_fn+0x26/0x130

This patch is to fix it by returning from the timer handler if asoc
strreset_chunk is already set to NULL.

Fixes: 7b9438de0c ("sctp: add stream reconf timer")
Reported-by: Ying Xu <yinxu@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2022-05-09 09:14:35 +02:00
..
6lowpan 6lowpan: iphc: Fix an off-by-one check of array index 2021-07-22 16:19:03 +02:00
9p xen/9p: use alloc/free_pages_exact() 2022-03-11 12:22:36 +01:00
802 net: 802: remove dead leftover after ipx driver removal 2021-08-13 16:30:35 -07:00
8021q net: vlan: fix underflow for the real_dev refcnt 2021-12-01 09:04:53 +01:00
appletalk net: socket: rework compat_ifreq_ioctl() 2021-07-23 14:20:25 +01:00
atm atm: Use list_for_each_entry() to simplify code in resources.c 2021-06-10 14:08:09 -07:00
ax25 ax25: Fix UAF bugs in ax25 timers 2022-04-20 09:34:22 +02:00
batman-adv ipv6: make mc_forwarding atomic 2022-04-13 20:59:03 +02:00
bluetooth Bluetooth: Fix use after free in hci_send_acl 2022-04-13 20:59:09 +02:00
bpf bpf: Make remote_port field in struct bpf_sk_lookup 16-bit wide 2022-04-13 20:59:25 +02:00
bpfilter bpfilter: Specify the log level for the kmsg message 2021-06-25 13:13:50 +02:00
bridge net: bridge: multicast: notify switchdev driver whenever MC processing gets disabled 2022-02-23 12:03:13 +01:00
caif net-caif: avoid user-triggerable WARN_ON(1) 2021-09-14 12:51:15 +01:00
can can: isotp: stop timeout monitoring when no first frame was sent 2022-04-27 14:38:54 +02:00
ceph Networking changes for 5.14. 2021-06-30 15:51:09 -07:00
core bpf, lwt: Fix crash when using bpf_skb_set_tunnel_key() from bpf_xmit lwt hook 2022-05-09 09:14:35 +02:00
dcb net: dcb: disable softirqs in dcbnl_flush_dev() 2022-03-08 19:12:52 +01:00
dccp tcp: switch orphan_count to bare per-cpu counters 2021-11-18 19:16:33 +01:00
decnet net: Remove redundant if statements 2021-08-05 13:27:50 +01:00
dns_resolver
…
dsa net: dsa: Add missing of_node_put() in dsa_port_link_register_of 2022-05-09 09:14:34 +02:00
ethernet move netdev_boot_setup into Space.c 2021-08-03 13:05:26 +01:00
ethtool ethtool: do not perform operations on net devices being unregistered 2021-12-14 10:57:09 +01:00
hsr net: hsr: don't check sequence number if tag removal is offloaded 2021-06-16 12:13:01 -07:00
ieee802154 net: ieee802154: Return meaningful error codes from the netlink helpers 2022-02-08 18:34:09 +01:00
ife
…
ipv4 tcp: ensure to use the most recently sent skb when filling the rate sample 2022-05-09 09:14:35 +02:00
ipv6 ipv6: make ip6_rt_gc_expire an atomic_t 2022-04-27 14:38:54 +02:00
iucv net/iucv: Replace deprecated CPU-hotplug functions. 2021-08-09 10:13:32 +01:00
kcm net: sock: introduce sk_error_report 2021-06-29 11:28:21 -07:00
key af_key: add __GFP_ZERO flag for compose_sadb_supported in function pfkey_register 2022-04-08 14:22:47 +02:00
l2tp net/l2tp: Fix reference count leak in l2tp_udp_recv_core 2021-09-09 11:00:20 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-27 14:38:53 +02:00
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: only change llc->dev when bind() succeeds 2022-03-28 09:58:46 +02:00
mac80211 mac80211: limit bandwidth in HE capabilities 2022-04-08 14:23:28 +02:00
mac802154 ieee802154: Remove redundant initialization of variable ret 2021-09-07 14:06:08 +01:00
mctp mctp: Fix check for dev_hard_header() result 2022-04-13 20:59:16 +02:00
mpls net: mpls: Fix notifications when deleting a device 2021-12-08 09:04:47 +01:00
mptcp mptcp: Correctly set DATA_FIN timeout when number of retransmits is large 2022-03-08 19:12:48 +01:00
ncsi net/ncsi: check for error return from call to nla_put_u32 2022-01-05 12:42:37 +01:00
netfilter netfilter: nft_set_rbtree: overlap detection with element re-addition after deletion 2022-05-09 09:14:35 +02:00
netlabel netlabel: fix out-of-bounds memory accesses 2022-04-13 20:59:10 +02:00
netlink netlink: reset network and mac headers in netlink_dump() 2022-04-27 14:38:54 +02:00
netrom netrom: fix api breakage in nr_setsockopt() 2022-01-27 11:04:00 +01:00
nfc nfc: nci: add flush_workqueue to prevent uaf 2022-04-20 09:34:13 +02:00
nsh
…
openvswitch netfilter: conntrack: convert to refcount_t api 2022-04-27 14:39:01 +02:00
packet net/packet: fix packet_sock xmit return value checking 2022-04-27 14:38:53 +02:00
phonet phonet: refcount leak in pep_sock_accep 2022-01-11 15:35:16 +01:00
psample
…
qrtr net: qrtr: revert check in qrtr_endpoint_post() 2021-09-02 11:37:02 +01:00
rds rds: memory leak in __rds_conn_create() 2021-12-22 09:32:42 +01:00
rfkill rfkill: make new event layout opt-in 2022-04-08 14:23:00 +02:00
rose
…
rxrpc rxrpc: Restore removed timer deletion 2022-04-27 14:38:53 +02:00
sched netfilter: conntrack: convert to refcount_t api 2022-04-27 14:39:01 +02:00
sctp sctp: check asoc strreset_chunk in sctp_generate_reconf_event 2022-05-09 09:14:35 +02:00
smc net/smc: Fix sock leak when release after smc_shutdown() 2022-04-27 14:38:53 +02:00
strparser bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding 2021-11-18 19:17:11 +01:00
sunrpc SUNRPC: Fix NFSD's request deferral on RDMA transports 2022-04-20 09:34:18 +02:00
switchdev net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge 2021-08-04 12:35:07 +01:00
tipc tipc: fix the timer expires after interval 100ms 2022-04-08 14:23:43 +02:00
tls net/tls: fix slab-out-of-bounds bug in decrypt_internal 2022-04-13 20:59:15 +02:00
unix af_unix: Support POLLPRI for OOB. 2022-04-08 14:24:14 +02:00
vmw_vsock vsock/virtio: enable VQs early on probe 2022-04-08 14:23:51 +02:00
wireless nl80211: correctly check NL80211_ATTR_REG_ALPHA2 size 2022-04-20 09:34:19 +02:00
x25 net/x25: Fix null-ptr-deref caused by x25_disconnect 2022-04-08 14:23:53 +02:00
xdp xsk: Fix l2fwd for copy mode + busy poll combo 2022-05-09 09:14:32 +02:00
xfrm xfrm: fix tunnel model fragmentation behavior 2022-04-08 14:22:46 +02:00
Kconfig mctp: Add MCTP base 2021-07-29 15:06:49 +01:00
Makefile mctp: Add MCTP base 2021-07-29 15:06:49 +01:00
compat.c net: Return the correct errno code 2021-06-03 15:13:56 -07:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
socket.c net: fix SOF_TIMESTAMPING_BIND_PHC to work with multiple sockets 2022-01-27 11:03:52 +01:00
sysctl_net.c
…