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Davide Caratti a089369346 net/sched: unregister lockdep keys in qdisc_create/qdisc_alloc error path 
commit 86735b57c9 upstream.

Naresh and Eric report several errors (corrupted elements in the dynamic
key hash list), when running tdc.py or syzbot. The error path of
qdisc_alloc() and qdisc_create() frees the qdisc memory, but it forgets
to unregister the lockdep key, thus causing use-after-free like the
following one:

 ==================================================================
 BUG: KASAN: slab-use-after-free in lockdep_register_key+0x5f2/0x700
 Read of size 8 at addr ffff88811236f2a8 by task ip/7925

 CPU: 26 PID: 7925 Comm: ip Kdump: loaded Not tainted 6.9.0-rc2+ #648
 Hardware name: Supermicro SYS-6027R-72RF/X9DRH-7TF/7F/iTF/iF, BIOS 3.0  07/26/2013
 Call Trace:
  <TASK>
  dump_stack_lvl+0x7c/0xc0
  print_report+0xc9/0x610
  kasan_report+0x89/0xc0
  lockdep_register_key+0x5f2/0x700
  qdisc_alloc+0x21d/0xb60
  qdisc_create_dflt+0x63/0x3c0
  attach_one_default_qdisc.constprop.37+0x8e/0x170
  dev_activate+0x4bd/0xc30
  __dev_open+0x275/0x380
  __dev_change_flags+0x3f1/0x570
  dev_change_flags+0x7c/0x160
  do_setlink+0x1ea1/0x34b0
  __rtnl_newlink+0x8c9/0x1510
  rtnl_newlink+0x61/0x90
  rtnetlink_rcv_msg+0x2f0/0xbc0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x420/0x630
  netlink_sendmsg+0x732/0xbc0
  __sock_sendmsg+0x1ea/0x280
  ____sys_sendmsg+0x5a9/0x990
  ___sys_sendmsg+0xf1/0x180
  __sys_sendmsg+0xd3/0x180
  do_syscall_64+0x96/0x180
  entry_SYSCALL_64_after_hwframe+0x71/0x79
 RIP: 0033:0x7f9503f4fa07
 Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
 RSP: 002b:00007fff6c729068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
 RAX: ffffffffffffffda RBX: 000000006630c681 RCX: 00007f9503f4fa07
 RDX: 0000000000000000 RSI: 00007fff6c7290d0 RDI: 0000000000000003
 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000078
 R10: 000000000000009b R11: 0000000000000246 R12: 0000000000000001
 R13: 00007fff6c729180 R14: 0000000000000000 R15: 000055bf67dd9040
  </TASK>

 Allocated by task 7745:
  kasan_save_stack+0x1c/0x40
  kasan_save_track+0x10/0x30
  __kasan_kmalloc+0x7b/0x90
  __kmalloc_node+0x1ff/0x460
  qdisc_alloc+0xae/0xb60
  qdisc_create+0xdd/0xfb0
  tc_modify_qdisc+0x37e/0x1960
  rtnetlink_rcv_msg+0x2f0/0xbc0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x420/0x630
  netlink_sendmsg+0x732/0xbc0
  __sock_sendmsg+0x1ea/0x280
  ____sys_sendmsg+0x5a9/0x990
  ___sys_sendmsg+0xf1/0x180
  __sys_sendmsg+0xd3/0x180
  do_syscall_64+0x96/0x180
  entry_SYSCALL_64_after_hwframe+0x71/0x79

 Freed by task 7745:
  kasan_save_stack+0x1c/0x40
  kasan_save_track+0x10/0x30
  kasan_save_free_info+0x36/0x60
  __kasan_slab_free+0xfe/0x180
  kfree+0x113/0x380
  qdisc_create+0xafb/0xfb0
  tc_modify_qdisc+0x37e/0x1960
  rtnetlink_rcv_msg+0x2f0/0xbc0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x420/0x630
  netlink_sendmsg+0x732/0xbc0
  __sock_sendmsg+0x1ea/0x280
  ____sys_sendmsg+0x5a9/0x990
  ___sys_sendmsg+0xf1/0x180
  __sys_sendmsg+0xd3/0x180
  do_syscall_64+0x96/0x180
  entry_SYSCALL_64_after_hwframe+0x71/0x79

Fix this ensuring that lockdep_unregister_key() is called before the
qdisc struct is freed, also in the error path of qdisc_create() and
qdisc_alloc().

Fixes: af0cb3fa3f ("net/sched: fix false lockdep warning on qdisc root lock")
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Closes: https://lore.kernel.org/netdev/20240429221706.1492418-1-naresh.kamboju@linaro.org/
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/2aa1ca0c0a3aa0acc15925c666c777a4b5de553c.1714496886.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2024-06-27 13:49:15 +02:00
..
6lowpan
…
9p net/9p: fix uninit-value in p9_client_rpc() 2024-06-16 13:47:41 +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: Replace kfree() in ax25_dev_free() with ax25_dev_put() 2024-06-21 14:38:14 +02:00
batman-adv batman-adv: bypass empty buckets in batadv_purge_orig_ref() 2024-06-27 13:49:01 +02:00
bluetooth Bluetooth: fix connection setup in l2cap_connect 2024-06-21 14:38:34 +02:00
bpf bpf: Set run context for rawtp test_run callback 2024-06-21 14:38:16 +02:00
bpfilter
…
bridge net: bridge: mst: fix suspicious rcu usage in br_mst_set_state 2024-06-21 14:38:36 +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: do not leave a dangling sk pointer, when socket creation fails 2024-06-27 13:49:11 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
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 net: dsa: mark parsed interface mode for legacy switch drivers 2023-08-09 13:08:09 -07:00
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 net: ethtool: fix the error condition in ethtool_get_phy_stats_ethtool() 2024-06-21 14:38:20 +02:00
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 sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:42:30 +00:00
ipv4 tcp: clear tp->retrans_stamp in tcp_rcv_fastopen_synack() 2024-06-27 13:49:13 +02:00
ipv6 seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors 2024-06-27 13:49:08 +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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
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: correctly parse Spatial Reuse Parameter Set element 2024-06-21 14:38:13 +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: pm: update add_addr counters after connect 2024-06-21 14:38:38 +02:00
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-06-21 14:38:14 +02:00
netfilter netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core 2024-06-27 13:49:08 +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 a memory leak in nr_heartbeat_expiry() 2024-06-27 13:49:06 +02:00
nfc nfc: nci: Fix handling of zero-length payload packets in nci_rx_work() 2024-06-12 11:12:51 +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 openvswitch: Set the skbuff pkt_type for proper pmtud support. 2024-06-12 11:12:49 +02:00
packet af_packet: avoid a false positive warning in packet_setsockopt() 2024-06-27 13:49:01 +02:00
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: Fix module refcnt 2024-06-12 11:12:12 +02:00
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: unregister lockdep keys in qdisc_create/qdisc_alloc error path 2024-06-27 13:49:15 +02:00
sctp sctp: fix busy polling 2024-01-25 15:35:30 -08:00
smc net/smc: avoid overwriting when adjusting sock bufsizes 2024-06-21 14:38:16 +02:00
strparser
…
sunrpc SUNRPC: return proper error from gss_wrap_req_priv 2024-06-21 14:38:28 +02:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:35:06 +01:00
tipc tipc: force a dst refcount before doing decryption 2024-06-27 13:49:07 +02:00
tls tls: fix missing memory barrier in tls_init 2024-06-12 11:12:50 +02:00
unix af_unix: Read with MSG_PEEK loops if the first unread byte is OOB 2024-06-21 14:38:36 +02:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-10 16:35:50 +02:00
wireless wifi: cfg80211: pmsr: use correct nla_get_uX functions 2024-06-21 14:38:12 +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 net: fix __dst_negative_advice() race 2024-06-16 13:47:44 +02:00
Kconfig
…
Kconfig.debug
…
Makefile
…
compat.c
…
devres.c
…
socket.c net: Save and restore msg_namelen in sock_sendmsg 2024-01-10 17:16:51 +01:00
sysctl_net.c sysctl: Add size to register_net_sysctl function 2023-08-15 15:26:17 -07:00