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Xiang Mei 466e10194a net/sched: sch_qfq: Fix race condition on qfq_aggregate 
[ Upstream commit 5e28d5a3f7 ]

A race condition can occur when 'agg' is modified in qfq_change_agg
(called during qfq_enqueue) while other threads access it
concurrently. For example, qfq_dump_class may trigger a NULL
dereference, and qfq_delete_class may cause a use-after-free.

This patch addresses the issue by:

1. Moved qfq_destroy_class into the critical section.

2. Added sch_tree_lock protection to qfq_dump_class and
qfq_dump_class_stats.

Fixes: 462dbc9101 ("pkt_sched: QFQ Plus: fair-queueing service at DRR cost")
Signed-off-by: Xiang Mei <xmei5@asu.edu>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-07-24 08:51:51 +02:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p 9p/net: fix improper handling of bogus negative read/write replies 2025-05-02 07:47:04 +02:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:34:38 +01:00
8021q net: vlan: don't propagate flags on open 2025-04-25 10:43:31 +02:00
appletalk net: appletalk: Fix device refcount leak in atrtr_create() 2025-07-17 18:32:12 +02:00
atm atm: clip: Fix NULL pointer dereference in vcc_sendmsg() 2025-07-17 18:32:06 +02:00
ax25 ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt 2025-02-21 13:49:56 +01:00
batman-adv batman-adv: Ignore own maximum aggregation size during RX 2025-03-28 21:59:01 +01:00
bluetooth Bluetooth: hci_sync: Fix not disabling advertising instance 2025-07-17 18:32:04 +02:00
bpf bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() 2025-03-07 16:56:37 +01:00
bpfilter uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
bridge net: bridge: mcast: re-implement br_multicast_{enable, disable}_port functions 2025-06-27 11:07:35 +01:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-17 08:50:24 +01:00
can can: bcm: add missing rcu read protection for procfs content 2025-06-04 14:40:20 +02:00
ceph libceph: fix race between delayed_work() and ceph_monc_stop() 2024-07-18 13:18:41 +02:00
core net: selftests: fix TCP packet checksum 2025-07-06 10:58:00 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 12:08:17 +02:00
dccp net: fix data-races around sk->sk_forward_alloc 2025-01-23 17:17:17 +01:00
devlink devlink: bump the instance index directly when iterating 2024-10-22 15:56:43 +02:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:27:38 -08:00
dsa net: dsa: tag_brcm: legacy: fix pskb_may_pull length 2025-06-27 11:07:17 +01:00
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:29:29 +02:00
ethtool net: ethtool: Don't call .cleanup_data when prepare_data fails 2025-04-25 10:43:25 +02:00
hsr net: hsr: fix fill_frame_info() regression vs VLAN packets 2025-02-21 13:49:23 +01:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 19:54:41 +01:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:38:56 +00:00
ipv4 tcp: fix passive TFO socket having invalid NAPI ID 2025-06-27 11:07:39 +01:00
ipv6 gre: Fix IPv6 multicast route creation. 2025-07-17 18:32:07 +02:00
iucv s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() 2024-12-14 19:53:50 +01:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-08-29 17:30:44 +02:00
key net: af_key: fix sadb_x_filter validation 2023-08-23 17:52:32 +02:00
l2tp genetlink: hold RCU in genlmsg_mcast() 2024-11-01 01:56:00 +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 net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: fix data loss when reading from a socket in llc_ui_recvmsg() 2025-06-04 14:40:21 +02:00
mac80211 wifi: mac80211: drop invalid source address OCB frames 2025-07-10 15:59:50 +02:00
mac802154 mac802154: check local interfaces before deleting sdata list 2025-01-23 17:17:11 +01:00
mctp net: mctp: Ensure keys maintain only one ref to corresponding dev 2025-05-22 14:10:02 +02:00
mpls mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). 2025-06-27 11:07:39 +01:00
mptcp mptcp: sockopt: fix getting freebind & transparent 2025-04-25 10:44:00 +02:00
ncsi net: ncsi: Fix GCPS 64-bit member variables 2025-06-27 11:07:09 +01:00
netfilter netfilter: nf_set_pipapo_avx2: fix initial map fill 2025-06-27 11:07:18 +01:00
netlabel calipso: unlock rcu before returning -EAFNOSUPPORT 2025-06-27 11:07:25 +01:00
netlink netlink: make sure we allow at least one dump skb 2025-07-17 18:32:09 +02:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:30:01 +01:00
nfc NFC: nci: uart: Set tty->disc_data only in success path 2025-06-27 11:07:29 +01:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 11:55:59 +02:00
openvswitch net: openvswitch: Fix the dead loop of MPLS parse 2025-06-27 11:07:12 +01:00
packet af_packet: fix soft lockup issue caused by tpacket_snd() 2025-07-24 08:51:49 +02:00
phonet phonet/pep: Move call to pn_skb_get_dst_sockaddr() earlier in pep_sock_accept() 2025-07-24 08:51:48 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:39:11 +01:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-10-17 15:21:13 +02:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-08-29 17:30:20 +02:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-14 19:53:33 +01:00
rose rose: fix dangling neighbour pointers in rose_rt_device_down() 2025-07-10 15:59:48 +02:00
rxrpc rxrpc: Fix oops due to non-existence of prealloc backlog struct 2025-07-17 18:32:06 +02:00
sched net/sched: sch_qfq: Fix race condition on qfq_aggregate 2025-07-24 08:51:51 +02:00
sctp sctp: Do not wake readers in __sctp_write_space() 2025-06-27 11:07:33 +01:00
smc net/smc: use the correct ndev to find pnetid by pnetid table 2025-06-04 14:40:06 +02:00
strparser strparser: Add read_sock callback 2025-03-07 16:56:37 +01:00
sunrpc SUNRPC: rpcbind should never reset the port to the value '0' 2025-06-04 14:40:03 +02:00
switchdev net: switchdev: Convert blocking notification chain to a raw one 2025-03-28 21:58:49 +01:00
tipc tipc: Fix use-after-free in tipc_conn_close(). 2025-07-17 18:32:05 +02:00
tls ktls, sockmap: Fix missing uncharge operation 2025-06-27 11:07:11 +01:00
unix af_unix: Don't set -ECONNRESET for consumed OOB skb. 2025-07-06 10:58:00 +02:00
vmw_vsock vsock: Fix IOCTL_VM_SOCKETS_GET_LOCAL_CID to check also transport_local 2025-07-17 18:32:05 +02:00
wireless wifi: prevent A-MSDU attacks in mesh networks 2025-07-17 18:32:08 +02:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:20:42 -04:00
xdp xsk: fix an integer overflow in xp_create_and_assign_umem() 2025-03-28 21:59:01 +01:00
xfrm xfrm: Sanitize marks before insert 2025-06-04 14:40:19 +02:00
compat.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
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 af_unix: Remove CONFIG_UNIX_SCM. 2025-06-04 14:40:23 +02:00
socket.c net: explicitly clear the sk pointer, when pf->create fails 2024-10-17 15:22:27 +02:00
sysctl_net.c sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00