linux/include/net
Sven Stegemann 52565a9352 net: kcm: Fix race condition in kcm_unattach()
syzbot found a race condition when kcm_unattach(psock)
and kcm_release(kcm) are executed at the same time.

kcm_unattach() is missing a check of the flag
kcm->tx_stopped before calling queue_work().

If the kcm has a reserved psock, kcm_unattach() might get executed
between cancel_work_sync() and unreserve_psock() in kcm_release(),
requeuing kcm->tx_work right before kcm gets freed in kcm_done().

Remove kcm->tx_stopped and replace it by the less
error-prone disable_work_sync().

Fixes: ab7ac4eb98 ("kcm: Kernel Connection Multiplexor module")
Reported-by: syzbot+e62c9db591c30e174662@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=e62c9db591c30e174662
Reported-by: syzbot+d199b52665b6c3069b94@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=d199b52665b6c3069b94
Reported-by: syzbot+be6b1fdfeae512726b4e@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=be6b1fdfeae512726b4e
Signed-off-by: Sven Stegemann <sven@stegemann.de>
Link: https://patch.msgid.link/20250812191810.27777-1-sven@stegemann.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-08-13 18:18:33 -07:00
..
9p
bluetooth
caif
iucv
libeth
mana
netfilter netfilter: nft_set: remove indirection from update API call 2025-07-25 18:40:23 +02:00
netns
nfc
page_pool net: page_pool: allow enabling recycling late, fix false positive warning 2025-08-08 12:54:42 -07:00
phonet
sctp sctp: Replace sockaddr with sockaddr_inet in sctp_addr union 2025-07-25 15:29:58 -07:00
tc_act
6lowpan.h
Space.h
act_api.h
addrconf.h
af_ieee802154.h
af_rxrpc.h
af_unix.h
af_vsock.h
ah.h
aligned_data.h
amt.h
arp.h
atmclip.h
ax25.h
ax88796.h
bareudp.h
bond_3ad.h
bond_alb.h
bond_options.h
bonding.h
bpf_sk_storage.h
busy_poll.h
calipso.h
cfg80211-wext.h
cfg80211.h
cfg802154.h
checksum.h
cipso_ipv4.h
cls_cgroup.h
codel.h
codel_impl.h
codel_qdisc.h
compat.h
datalink.h
dcbevent.h
dcbnl.h
devlink.h devlink: let driver opt out of automatic phys_port_name generation 2025-08-12 13:23:39 -07:00
dropreason-core.h
dropreason.h
dsa.h
dsa_stubs.h
dscp.h
dsfield.h
dst.h net: Add locking to protect skb->dev access in ip_output 2025-08-01 15:17:52 -07:00
dst_cache.h
dst_metadata.h
dst_ops.h
eee.h
erspan.h
esp.h
espintcp.h
ethoc.h
failover.h
fib_notifier.h
fib_rules.h
firewire.h
flow.h
flow_dissector.h
flow_offload.h
fou.h
fq.h
fq_impl.h
garp.h
gen_stats.h
genetlink.h
geneve.h
gre.h
gro.h net: Create separate gro_flush_normal function 2025-07-24 18:34:55 -07:00
gro_cells.h
gso.h
gtp.h
gue.h
handshake.h
hotdata.h
hwbm.h
icmp.h
ieee8021q.h
ieee80211_radiotap.h
ieee802154_netdev.h
if_inet6.h
ife.h
inet6_connection_sock.h
inet6_hashtables.h
inet_common.h
inet_connection_sock.h
inet_dscp.h
inet_ecn.h
inet_frag.h
inet_hashtables.h
inet_sock.h
inet_timewait_sock.h
inetpeer.h
ioam6.h
ip.h
ip6_checksum.h
ip6_fib.h
ip6_route.h
ip6_tunnel.h
ip_fib.h
ip_tunnels.h
ip_vs.h ipvs: Fix estimator kthreads preferred affinity 2025-08-13 08:34:33 +02:00
ipcomp.h
ipconfig.h
ipv6.h
ipv6_frag.h
ipv6_stubs.h
iw_handler.h
kcm.h net: kcm: Fix race condition in kcm_unattach() 2025-08-13 18:18:33 -07:00
l3mdev.h
lag.h
lapb.h
llc.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
lwtunnel.h
mac80211.h
mac802154.h
macsec.h
mctp.h
mctpdevice.h
mip6.h
mld.h
mpls.h
mpls_iptunnel.h
mptcp.h
mrp.h
ncsi.h
ndisc.h
neighbour.h
neighbour_tables.h
net_debug.h
net_failover.h
net_namespace.h
net_ratelimit.h
net_shaper.h
net_trackers.h
netdev_lock.h
netdev_netlink.h
netdev_queues.h
netdev_rx_queue.h
netevent.h
netkit.h
netlabel.h
netlink.h
netmem.h
netprio_cgroup.h
netrom.h
nexthop.h
nl802154.h
nsh.h
pfcp.h
pie.h
ping.h
pkt_cls.h
pkt_sched.h
pptp.h
proto_memory.h
protocol.h
psample.h
psnap.h
raw.h
rawv6.h
red.h
regulatory.h
request_sock.h
rose.h
route.h
rpl.h
rps.h
rsi_91x.h
rstreason.h
rtnetlink.h
rtnh.h
sch_generic.h
scm.h
secure_seq.h
seg6.h
seg6_hmac.h
seg6_local.h
selftests.h
slhc_vj.h
smc.h
snmp.h
sock.h
sock_reuseport.h
stp.h
strparser.h
switchdev.h
tc_wrapper.h
tcp.h Kbuild updates for v6.17 2025-08-06 07:32:52 +03:00
tcp_ao.h
tcp_states.h
tcx.h
timewait_sock.h
tipc.h
tls.h
tls_prot.h
tls_toe.h
transp_v6.h
tso.h
tun_proto.h
udp.h net: drop UFO packets in udp_rcv_segment() 2025-08-01 15:14:51 -07:00
udp_tunnel.h
udplite.h
vsock_addr.h
vxlan.h
wext.h
x25.h
x25device.h
xdp.h
xdp_priv.h
xdp_sock.h
xdp_sock_drv.h
xfrm.h
xsk_buff_pool.h