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Eric Dumazet 42d9ed4e5d ila: do not generate empty messages in ila_xlat_nl_cmd_get_mapping() 
[ Upstream commit 693aa2c0d9b6d5b1f2745d31b6e70d09dbbaf06e ]

ila_xlat_nl_cmd_get_mapping() generates an empty skb,
triggerring a recent sanity check [1].

Instead, return an error code, so that user space
can get it.

[1]
skb_assert_len
WARNING: CPU: 0 PID: 5923 at include/linux/skbuff.h:2527 skb_assert_len include/linux/skbuff.h:2527 [inline]
WARNING: CPU: 0 PID: 5923 at include/linux/skbuff.h:2527 __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156
Modules linked in:
CPU: 0 PID: 5923 Comm: syz-executor269 Not tainted 6.2.0-syzkaller-18300-g2ebd1fbb946d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : skb_assert_len include/linux/skbuff.h:2527 [inline]
pc : __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156
lr : skb_assert_len include/linux/skbuff.h:2527 [inline]
lr : __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156
sp : ffff80001e0d6c40
x29: ffff80001e0d6e60 x28: dfff800000000000 x27: ffff0000c86328c0
x26: dfff800000000000 x25: ffff0000c8632990 x24: ffff0000c8632a00
x23: 0000000000000000 x22: 1fffe000190c6542 x21: ffff0000c8632a10
x20: ffff0000c8632a00 x19: ffff80001856e000 x18: ffff80001e0d5fc0
x17: 0000000000000000 x16: ffff80001235d16c x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001
x11: ff80800008353a30 x10: 0000000000000000 x9 : 21567eaf25bfb600
x8 : 21567eaf25bfb600 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001e0d6558 x4 : ffff800015c74760 x3 : ffff800008596744
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000000e
Call trace:
skb_assert_len include/linux/skbuff.h:2527 [inline]
__dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156
dev_queue_xmit include/linux/netdevice.h:3033 [inline]
__netlink_deliver_tap_skb net/netlink/af_netlink.c:307 [inline]
__netlink_deliver_tap+0x45c/0x6f8 net/netlink/af_netlink.c:325
netlink_deliver_tap+0xf4/0x174 net/netlink/af_netlink.c:338
__netlink_sendskb net/netlink/af_netlink.c:1283 [inline]
netlink_sendskb+0x6c/0x154 net/netlink/af_netlink.c:1292
netlink_unicast+0x334/0x8d4 net/netlink/af_netlink.c:1380
nlmsg_unicast include/net/netlink.h:1099 [inline]
genlmsg_unicast include/net/genetlink.h:433 [inline]
genlmsg_reply include/net/genetlink.h:443 [inline]
ila_xlat_nl_cmd_get_mapping+0x620/0x7d0 net/ipv6/ila/ila_xlat.c:493
genl_family_rcv_msg_doit net/netlink/genetlink.c:968 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline]
genl_rcv_msg+0x938/0xc1c net/netlink/genetlink.c:1065
netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2574
genl_rcv+0x38/0x50 net/netlink/genetlink.c:1076
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x800/0xae0 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg net/socket.c:734 [inline]
____sys_sendmsg+0x558/0x844 net/socket.c:2479
___sys_sendmsg net/socket.c:2533 [inline]
__sys_sendmsg+0x26c/0x33c net/socket.c:2562
__do_sys_sendmsg net/socket.c:2571 [inline]
__se_sys_sendmsg net/socket.c:2569 [inline]
__arm64_sys_sendmsg+0x80/0x94 net/socket.c:2569
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
irq event stamp: 136484
hardirqs last enabled at (136483): [<ffff800008350244>] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:345
hardirqs last disabled at (136484): [<ffff800012358d60>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (136418): [<ffff800008020ea8>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last enabled at (136418): [<ffff800008020ea8>] __do_softirq+0xd4c/0xfa4 kernel/softirq.c:600
softirqs last disabled at (136371): [<ffff80000802b4a4>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
skb len=0 headroom=0 headlen=0 tailroom=192
mac=(0,0) net=(0,-1) trans=-1
shinfo(txflags=0 nr_frags=0 gso(size=0 type=0 segs=0))
csum(0x0 ip_summed=0 complete_sw=0 valid=0 level=0)
hash(0x0 sw=0 l4=0) proto=0x0010 pkttype=6 iif=0
dev name=nlmon0 feat=0x0000000000005861

Fixes: 7f00feaf10 ("ila: Add generic ILA translation facility")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-17 08:45:10 +01:00
..
6lowpan 6lowpan: iphc: Fix an off-by-one check of array index 2021-09-15 09:50:34 +02:00
9p 9p/rdma: unmap receive dma buffer in rdma_request()/post_recv() 2023-03-11 16:40:13 +01:00
802 mrp: introduce active flags to prevent UAF when applicant uninit 2023-01-14 10:16:18 +01:00
8021q net: make free_netdev() more lenient with unregistering devices 2022-07-29 17:19:07 +02:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-04-07 15:00:08 +02:00
atm net/atm: fix proc_mpc_write incorrect return value 2022-10-30 09:41:16 +01:00
ax25 net: ax25: Fix deadlock caused by skb_recv_datagram in ax25_recvmsg 2022-06-22 14:13:17 +02:00
batman-adv batman-adv: Don't skb_split skbuffs with frag_list 2022-05-18 10:23:42 +02:00
bluetooth Bluetooth: hci_sock: purge socket queues in the destruct() callback 2023-03-11 16:40:19 +01:00
bpf bpf: Move skb->len == 0 checks into __bpf_redirect 2023-01-14 10:15:31 +01:00
bpfilter bpfilter: Specify the log level for the kmsg message 2021-07-14 16:56:29 +02:00
bridge netfilter: ebtables: fix table blob use-after-free 2023-03-11 16:40:12 +01:00
caif net: Remove WARN_ON_ONCE(sk->sk_forward_alloc) from sk_stream_kill_queues(). 2023-03-03 11:44:51 +01:00
can can: j1939: do not wait 250 ms if the same addr was already claimed 2023-02-15 17:22:23 +01:00
ceph libceph: fix potential use-after-free on linger ping and resends 2022-05-25 09:17:56 +02:00
core net: fix __dev_kfree_skb_any() vs drop monitor 2023-03-11 16:40:12 +01:00
dcb net: dcb: disable softirqs in dcbnl_flush_dev() 2022-03-08 19:09:37 +01:00
dccp dccp/tcp: Avoid negative sk_forward_alloc by ipv6_pinfo.pktoptions. 2023-02-22 12:55:57 +01:00
decnet net: Fix data-races around sysctl_[rw]mem(_offset)?. 2022-08-31 17:15:19 +02:00
dns_resolver docs: networking: convert dns_resolver.txt to ReST 2020-04-28 14:39:46 -07:00
dsa net: dsa: ksz: Check return value 2022-12-14 11:32:01 +01:00
ethernet net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
ethtool net/ethtool/ioctl: return -EOPNOTSUPP if we have no phy stats 2023-01-24 07:19:55 +01:00
hsr hsr: Synchronize sequence number updates. 2023-01-14 10:15:37 +01:00
ieee802154 net: ieee802154: fix error return code in dgram_bind() 2022-11-03 23:57:51 +09:00
ife
ipv4 tcp: Fix listen() regression in 5.10.163 2023-03-11 16:40:19 +01:00
ipv6 ila: do not generate empty messages in ila_xlat_nl_cmd_get_mapping() 2023-03-17 08:45:10 +01:00
iucv net/af_iucv: remove WARN_ONCE on malformed RX packets 2021-03-07 12:34:05 +01:00
kcm kcm: close race conditions on sk_receive_queue 2022-11-25 17:45:56 +01:00
key af_key: Fix send_acquire race with pfkey_register 2022-12-02 17:39:58 +01:00
l2tp l2tp: Avoid possible recursive deadlock in l2tp_tunnel_register() 2023-03-11 16:39:29 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-27 13:53:50 +02:00
lapb net: lapb: Copy the skb before sending a packet 2021-02-10 09:29:14 +01:00
llc llc: only change llc->dev when bind() succeeds 2022-03-28 09:57:10 +02:00
mac80211 wifi: mac80211: make rate u32 in sta_set_rate_info_rx() 2023-03-11 16:39:28 +01:00
mac802154 mac802154: fix missing INIT_LIST_HEAD in ieee802154_if_add() 2022-12-14 11:32:01 +01:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-22 12:55:58 +01:00
mptcp mptcp: use proper req destructor for IPv6 2023-01-14 10:16:52 +01:00
ncsi net/ncsi: check for error return from call to nla_put_u32 2022-01-05 12:40:32 +01:00
netfilter netfilter: ctnetlink: fix possible refcount leak in ctnetlink_create_conntrack() 2023-03-11 16:40:12 +01:00
netlabel netlabel: fix out-of-bounds memory accesses 2022-04-13 21:01:00 +02:00
netlink netlink: annotate data races around sk_state 2023-02-01 08:23:24 +01:00
netrom netrom: Fix use-after-free caused by accept on already connected socket 2023-02-15 17:22:12 +01:00
nfc nfc: change order inside nfc_se_io error path 2023-03-17 08:45:07 +01:00
nsh treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
openvswitch net: openvswitch: fix possible memory leak in ovs_meter_cmd_set() 2023-02-22 12:55:57 +01:00
packet net/af_packet: make sure to pull mac header 2023-01-14 10:16:29 +01:00
phonet phonet: refcount leak in pep_sock_accep 2022-01-11 15:25:01 +01:00
psample net: psample: Fix netlink skb length with tunnel info 2021-03-07 12:34:07 +01:00
qrtr net: qrtr: free memory on error path in radix_tree_insert() 2023-02-15 17:22:16 +01:00
rds rds: rds_rm_zerocopy_callback() correct order for list_add_tail() 2023-03-11 16:39:26 +01:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2020-11-12 09:18:06 +01:00
rose net/rose: Fix to not accept on connected socket 2023-02-22 12:55:53 +01:00
rxrpc rxrpc: Fix missing unlock in rxrpc_do_sendmsg() 2023-01-14 10:16:12 +01:00
sched net/sched: act_sample: fix action bind logic 2023-03-11 16:40:13 +01:00
sctp sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop 2023-03-11 16:40:12 +01:00
smc net/smc: Stop the CLC flow if no link to map buffers on 2022-09-28 11:10:36 +02:00
strparser bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding 2021-11-18 14:04:27 +01:00
sunrpc NFS: fix disabling of swap 2023-03-11 16:39:38 +01:00
switchdev net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP 2021-02-07 15:37:12 +01:00
tipc tipc: fix unexpected link reset due to discovery messages 2023-01-18 11:44:58 +01:00
tls net: tls: avoid hanging tasks on the tx_lock 2023-03-11 16:40:19 +01:00
unix af_unix: Get user_ns from in_skb in unix_diag_get_exact(). 2022-12-14 11:32:01 +01:00
vmw_vsock net: vmw_vsock: vmci: Check memcpy_from_msg() 2023-01-14 10:15:42 +01:00
wimax genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
wireless wifi: cfg80211: Partial revert "wifi: cfg80211: Fix use after free for wext" 2023-03-13 10:19:36 +01:00
x25 net/x25: Fix to not accept on connected socket 2023-02-15 17:22:15 +01:00
xdp xsk: Inherit need_wakeup flag for shared sockets 2022-10-15 07:55:51 +02:00
xfrm Fix XFRM-I support for nested ESP tunnels 2023-03-03 11:44:50 +01:00
compat.c net: Return the correct errno code 2021-06-18 10:00:06 +02:00
devres.c net: devres: rename the release callback of devm_register_netdev() 2020-06-30 15:57:34 -07:00
Kconfig drop_monitor: Convert to using devlink tracepoint 2020-09-30 18:01:26 -07:00
Makefile net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
socket.c net: remove cmsg restriction from io_uring based send/recvmsg calls 2023-01-04 11:39:24 +01:00
sysctl_net.c