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Paolo Abeni ffd4917c1e tipc: fix UAF in error path 
commit 080cbb8902 upstream.

Sam Page (sam4k) working with Trend Micro Zero Day Initiative reported
a UAF in the tipc_buf_append() error path:

BUG: KASAN: slab-use-after-free in kfree_skb_list_reason+0x47e/0x4c0
linux/net/core/skbuff.c:1183
Read of size 8 at addr ffff88804d2a7c80 by task poc/8034

CPU: 1 PID: 8034 Comm: poc Not tainted 6.8.2 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.0-debian-1.16.0-5 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack linux/lib/dump_stack.c:88
 dump_stack_lvl+0xd9/0x1b0 linux/lib/dump_stack.c:106
 print_address_description linux/mm/kasan/report.c:377
 print_report+0xc4/0x620 linux/mm/kasan/report.c:488
 kasan_report+0xda/0x110 linux/mm/kasan/report.c:601
 kfree_skb_list_reason+0x47e/0x4c0 linux/net/core/skbuff.c:1183
 skb_release_data+0x5af/0x880 linux/net/core/skbuff.c:1026
 skb_release_all linux/net/core/skbuff.c:1094
 __kfree_skb linux/net/core/skbuff.c:1108
 kfree_skb_reason+0x12d/0x210 linux/net/core/skbuff.c:1144
 kfree_skb linux/./include/linux/skbuff.h:1244
 tipc_buf_append+0x425/0xb50 linux/net/tipc/msg.c:186
 tipc_link_input+0x224/0x7c0 linux/net/tipc/link.c:1324
 tipc_link_rcv+0x76e/0x2d70 linux/net/tipc/link.c:1824
 tipc_rcv+0x45f/0x10f0 linux/net/tipc/node.c:2159
 tipc_udp_recv+0x73b/0x8f0 linux/net/tipc/udp_media.c:390
 udp_queue_rcv_one_skb+0xad2/0x1850 linux/net/ipv4/udp.c:2108
 udp_queue_rcv_skb+0x131/0xb00 linux/net/ipv4/udp.c:2186
 udp_unicast_rcv_skb+0x165/0x3b0 linux/net/ipv4/udp.c:2346
 __udp4_lib_rcv+0x2594/0x3400 linux/net/ipv4/udp.c:2422
 ip_protocol_deliver_rcu+0x30c/0x4e0 linux/net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2e4/0x520 linux/net/ipv4/ip_input.c:233
 NF_HOOK linux/./include/linux/netfilter.h:314
 NF_HOOK linux/./include/linux/netfilter.h:308
 ip_local_deliver+0x18e/0x1f0 linux/net/ipv4/ip_input.c:254
 dst_input linux/./include/net/dst.h:461
 ip_rcv_finish linux/net/ipv4/ip_input.c:449
 NF_HOOK linux/./include/linux/netfilter.h:314
 NF_HOOK linux/./include/linux/netfilter.h:308
 ip_rcv+0x2c5/0x5d0 linux/net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x199/0x1e0 linux/net/core/dev.c:5534
 __netif_receive_skb+0x1f/0x1c0 linux/net/core/dev.c:5648
 process_backlog+0x101/0x6b0 linux/net/core/dev.c:5976
 __napi_poll.constprop.0+0xba/0x550 linux/net/core/dev.c:6576
 napi_poll linux/net/core/dev.c:6645
 net_rx_action+0x95a/0xe90 linux/net/core/dev.c:6781
 __do_softirq+0x21f/0x8e7 linux/kernel/softirq.c:553
 do_softirq linux/kernel/softirq.c:454
 do_softirq+0xb2/0xf0 linux/kernel/softirq.c:441
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 linux/kernel/softirq.c:381
 local_bh_enable linux/./include/linux/bottom_half.h:33
 rcu_read_unlock_bh linux/./include/linux/rcupdate.h:851
 __dev_queue_xmit+0x871/0x3ee0 linux/net/core/dev.c:4378
 dev_queue_xmit linux/./include/linux/netdevice.h:3169
 neigh_hh_output linux/./include/net/neighbour.h:526
 neigh_output linux/./include/net/neighbour.h:540
 ip_finish_output2+0x169f/0x2550 linux/net/ipv4/ip_output.c:235
 __ip_finish_output linux/net/ipv4/ip_output.c:313
 __ip_finish_output+0x49e/0x950 linux/net/ipv4/ip_output.c:295
 ip_finish_output+0x31/0x310 linux/net/ipv4/ip_output.c:323
 NF_HOOK_COND linux/./include/linux/netfilter.h:303
 ip_output+0x13b/0x2a0 linux/net/ipv4/ip_output.c:433
 dst_output linux/./include/net/dst.h:451
 ip_local_out linux/net/ipv4/ip_output.c:129
 ip_send_skb+0x3e5/0x560 linux/net/ipv4/ip_output.c:1492
 udp_send_skb+0x73f/0x1530 linux/net/ipv4/udp.c:963
 udp_sendmsg+0x1a36/0x2b40 linux/net/ipv4/udp.c:1250
 inet_sendmsg+0x105/0x140 linux/net/ipv4/af_inet.c:850
 sock_sendmsg_nosec linux/net/socket.c:730
 __sock_sendmsg linux/net/socket.c:745
 __sys_sendto+0x42c/0x4e0 linux/net/socket.c:2191
 __do_sys_sendto linux/net/socket.c:2203
 __se_sys_sendto linux/net/socket.c:2199
 __x64_sys_sendto+0xe0/0x1c0 linux/net/socket.c:2199
 do_syscall_x64 linux/arch/x86/entry/common.c:52
 do_syscall_64+0xd8/0x270 linux/arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77 linux/arch/x86/entry/entry_64.S:120
RIP: 0033:0x7f3434974f29
Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48
89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 8b 0d 37 8f 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007fff9154f2b8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3434974f29
RDX: 00000000000032c8 RSI: 00007fff9154f300 RDI: 0000000000000003
RBP: 00007fff915532e0 R08: 00007fff91553360 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000212 R12: 000055ed86d261d0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

In the critical scenario, either the relevant skb is freed or its
ownership is transferred into a frag_lists. In both cases, the cleanup
code must not free it again: we need to clear the skb reference earlier.

Fixes: 1149557d64 ("tipc: eliminate unnecessary linearization of incoming buffers")
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-23852
Acked-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/752f1ccf762223d109845365d07f55414058e5a3.1714484273.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-05-17 12:02:32 +02:00
..
6lowpan
9p 9p: Fix read/write debug statements to report server reply 2024-04-10 16:35:57 +02:00
802
8021q net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-17 12:02:07 +02:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:01:50 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 17:01:48 +01:00
ax25 ax25: Fix netdev refcount issue 2024-05-02 16:32:36 +02:00
batman-adv batman-adv: Avoid infinite loop trying to resize local TT 2024-04-17 11:19:25 +02:00
bluetooth Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout 2024-05-17 12:02:21 +02:00
bpf bpf: Fix a few selftest failures due to llvm18 change 2024-02-05 20:14:20 +00:00
bpfilter
bridge net-sysfs: convert dev->operstate reads to lockless ones 2024-05-17 12:02:23 +02:00
caif
can can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER) 2024-02-23 09:25:17 +01:00
ceph libceph: fail sparse-read if the data length doesn't match 2024-03-01 13:34:56 +01:00
core net-sysfs: convert dev->operstate reads to lockless ones 2024-05-17 12:02:23 +02:00
dcb
dccp dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses. 2023-11-20 11:59:35 +01:00
devlink devlink: fix port new reply cmd type 2024-03-26 18:20:11 -04:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:35:41 -08:00
dsa
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:32:46 +02:00
ethtool ethtool: netlink: Add missing ethnl_ops_begin/complete 2024-01-25 15:36:00 -08:00
handshake net/handshake: Fix handshake_req_destroy_test1 2024-02-23 09:24:50 +01:00
hsr hsr: Simplify code for announcing HSR nodes timer setup 2024-05-17 12:02:24 +02:00
ieee802154
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:42:30 +00:00
ipv4 tcp: Use refcount_inc_not_zero() in tcp_twsk_unique(). 2024-05-17 12:02:20 +02:00
ipv6 ipv6: prevent NULL dereference in ip6_output() 2024-05-17 12:02:24 +02:00
iucv net/iucv: fix the allocation size of iucv_path_table array 2024-03-26 18:19:12 -04:00
kcm net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function 2024-03-26 18:19:40 -04:00
key
l2tp net l2tp: drop flow hash on forward 2024-05-17 12:02:02 +02:00
l3mdev
lapb
llc llc: call sock_orphan() at release time 2024-02-05 20:14:36 +00:00
mac80211 wifi: mac80211: fix prep_connection error path 2024-05-17 12:02:10 +02:00
mac802154 mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-04-03 15:28:27 +02:00
mctp net: mctp: copy skb ext data when fragmenting 2024-03-26 18:19:34 -04:00
mpls net: mpls: error out if inner headers are not set 2024-04-13 13:07:41 +02:00
mptcp mptcp: only allow set existing scheduler for net.mptcp.scheduler 2024-05-17 12:02:30 +02:00
ncsi net/ncsi: Fix netlink major/minor version numbers 2024-01-25 15:35:20 -08:00
netfilter netfilter: nf_tables: honor table dormant flag from netdev release event path 2024-05-02 16:32:39 +02:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:35:14 -08:00
netlink netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter 2024-03-06 14:48:34 +00:00
netrom netrom: Fix data-races around sysctl_net_busy_read 2024-03-15 10:48:21 -04:00
nfc nfc: nci: Fix kcov check in nci_rx_work() 2024-05-17 12:02:22 +02:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 12:02:02 +02:00
openvswitch net: openvswitch: Fix Use-After-Free in ovs_ct_exit 2024-05-02 16:32:38 +02:00
packet packet: annotate data-races around ignore_outgoing 2024-03-26 18:20:10 -04:00
phonet phonet: fix rtm_phonet_notify() skb allocation 2024-05-17 12:02:22 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:45:10 +01:00
qrtr net: qrtr: ns: Return 0 if server port is not present 2024-01-20 11:51:47 +01:00
rds net/rds: fix possible cp null dereference 2024-04-10 16:35:49 +02:00
rfkill net: rfkill: gpio: set GPIO direction 2024-01-01 12:42:41 +00:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:42:31 +00:00
rxrpc rxrpc: Only transmit one ACK per jumbo packet received 2024-05-17 12:02:23 +02:00
sched net/sched: fix lockdep splat in qdisc_tree_reduce_backlog() 2024-04-10 16:35:51 +02:00
sctp sctp: fix busy polling 2024-01-25 15:35:30 -08:00
smc net/smc: fix neighbour and rtable leak in smc_ib_find_route() 2024-05-17 12:02:24 +02:00
strparser
sunrpc SUNRPC: add a missing rpc_stat for TCP TLS 2024-05-17 12:02:20 +02:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:35:06 +01:00
tipc tipc: fix UAF in error path 2024-05-17 12:02:32 +02:00
tls tls: fix lockless read of strp->msg_ready in ->poll 2024-05-02 16:32:40 +02:00
unix af_unix: Suppress false-positive lockdep splat for spin_lock() in __unix_gc(). 2024-05-02 16:32:40 +02:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-10 16:35:50 +02:00
wireless wifi: cfg80211: fix rdev_dump_mpp() arguments order 2024-05-17 12:02:10 +02:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:19:41 -04:00
xdp xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING 2024-04-17 11:19:28 +02:00
xfrm xfrm: Preserve vlan tags for transport mode software GRO 2024-05-17 12:02:20 +02:00
compat.c
devres.c
Kconfig
Kconfig.debug
Makefile
socket.c net: Save and restore msg_namelen in sock_sendmsg 2024-01-10 17:16:51 +01:00
sysctl_net.c