Eric Dumazet 3e7917c0cd net: linkwatch: use system_unbound_wq ... linkwatch_event() grabs possibly very contended RTNL mutex. system_wq is not suitable for such work. Inspired by many noisy syzbot reports. 3 locks held by kworker/0:7/5266: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003f6fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] , at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fa6f208 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 Reported-by: syzbot <syzkaller@googlegroups.com> Fixes: 1da177e4c3 ("Linux-2.6.12-rc2") Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://patch.msgid.link/20240805085821.1616528-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2024-08-06 12:12:53 -07:00
..
bpf_sk_storage.c	netlink: introduce type-checking attribute iteration	2024-03-29 15:06:02 -07:00
datagram.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2024-07-11 12:58:13 -07:00
dev_addr_lists_test.c	net: dev_addr_lists: move locking out of init/exit in kunit	2024-04-15 10:26:35 +01:00
dev_addr_lists.c
dev_ioctl.c	net: Change the API of PHY default timestamp to MAC	2024-07-15 08:02:26 -07:00
dev.c	tun: Add missing bpf_net_ctx_clear() in do_xdp_generic()	2024-07-29 10:55:15 +01:00
dev.h	net: softnet_data: Make xmit per task.	2024-06-24 16:41:23 -07:00
drop_monitor.c	net: add rx_sk to trace_kfree_skb	2024-06-19 12:44:22 +01:00
dst_cache.c	net: dst_cache: add two DEBUG_NET warnings	2024-06-03 18:50:09 -07:00
dst.c	net: dst: Make dst_destroy() static and return void.	2024-02-06 11:45:53 +01:00
failover.c	net: failover: use IFF_NO_ADDRCONF flag to prevent ipv6 addrconf	2022-12-12 15:18:25 -08:00
fib_notifier.c
fib_rules.c	fib: rules: no longer hold RTNL in fib_nl_dumprule()	2024-04-12 19:09:31 -07:00
filter.c	bpf: Fix a segment issue when downgrading gso_size	2024-07-25 11:50:14 +02:00
flow_dissector.c	net: flow_dissector: use DEBUG_NET_WARN_ON_ONCE	2024-07-18 10:52:17 +02:00
flow_offload.c	tc: flower: Enable offload support IPSEC SPI field.	2023-08-02 10:09:32 +01:00
gen_estimator.c	net: use unrcu_pointer() helper	2024-06-06 11:52:52 +02:00
gen_stats.c
gro_cells.c	net: move netdev_max_backlog to net_hotdata	2024-03-07 21:12:42 -08:00
gro.c	net: gro: move L3 flush checks to tcp_gro_receive and udp_gro_receive_segment	2024-05-13 14:44:06 -07:00
gso.c	net: introduce struct net_hotdata	2024-03-07 21:12:41 -08:00
hotdata.c	net: move sysctl_mem_pcpu_rsv to net_hotdata	2024-04-30 18:46:52 -07:00
hwbm.c
ieee8021q_helpers.c	net: add IEEE 802.1q specific helpers	2024-05-08 10:35:09 +01:00
link_watch.c	net: linkwatch: use system_unbound_wq	2024-08-06 12:12:53 -07:00
lwt_bpf.c	net: Reference bpf_redirect_info via task_struct on PREEMPT_RT.	2024-06-24 16:41:24 -07:00
lwtunnel.c
Makefile	net: add IEEE 802.1q specific helpers	2024-05-08 10:35:09 +01:00
neighbour.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
net_namespace.c	netns: Make get_net_ns() handle zero refcount net	2024-06-18 10:59:52 +02:00
net_test.c	pfcp: always set pfcp metadata	2024-04-01 10:49:28 +01:00
net-procfs.c	net: make softnet_data.dropped an atomic_t	2024-04-01 11:28:32 +01:00
net-sysfs.c	netdevice: define and allocate &net_device _properly_	2024-07-11 18:11:31 -07:00
net-sysfs.h
net-traces.c	udp6: add a missing call into udp_fail_queue_rcv_skb tracepoint	2023-07-07 09:16:52 +01:00
netclassid_cgroup.c	cgroup, netclassid: on modifying netclassid in cgroup, only consider the main process.	2023-10-16 16:36:53 -07:00
netdev-genl-gen.c	netdev: support dumping a single netdev in qstats	2024-04-23 10:09:49 -07:00
netdev-genl-gen.h	netdev: add per-queue statistics	2024-03-07 21:13:25 -08:00
netdev-genl.c	netdev-genl: fix error codes when outputting XDP features	2024-06-14 18:04:29 -07:00
netevent.c
netpoll.c	netpoll: Fix race condition in netpoll_owner_active	2024-04-30 19:03:47 -07:00
netprio_cgroup.c
of_net.c	net: Explicitly include correct DT includes	2023-07-27 20:33:16 -07:00
page_pool_priv.h	net: page_pool: report when page pool was destroyed	2023-11-28 15:48:39 +01:00
page_pool_user.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2024-03-07 10:29:36 -08:00
page_pool.c	page_pool: use __cacheline_group_{begin, end}_aligned()	2024-07-10 10:28:23 -07:00
pktgen.c	net: pktgen: Use wait_event_freezable_timeout() for freezable kthread	2023-12-27 14:34:52 +00:00
ptp_classifier.c
request_sock.c	tcp: make sure init the accept_queue's spinlocks once	2024-01-19 21:13:25 -08:00
rtnetlink.c	rtnetlink: Don't ignore IFLA_TARGET_NETNSID when ifname is specified in rtnl_dellink().	2024-07-29 11:36:48 +01:00
scm.c	af_unix: Add dead flag to struct scm_fp_list.	2024-05-10 18:52:45 -07:00
secure_seq.c
selftests.c	net: fill in MODULE_DESCRIPTION()s under net/core	2023-10-28 11:29:27 +01:00
skbuff.c	page_pool: convert to use netmem	2024-07-02 18:59:33 -07:00
skmsg.c	skmsg: Skip zero length skb in sk_msg_recvmsg	2024-07-09 10:24:50 +02:00
sock_destructor.h
sock_diag.c	net: use unrcu_pointer() helper	2024-06-06 11:52:52 +02:00
sock_map.c	sock_map: avoid race between sock_map_close and sk_psock_put	2024-05-28 12:05:19 +02:00
sock_reuseport.c
sock.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2024-06-20 13:49:59 -07:00
stream.c	net: Return error from sk_stream_wait_connect() if sk_wait_event() fails	2023-12-15 10:48:51 +00:00
sysctl_net_core.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
timestamping.c	net: Change the API of PHY default timestamp to MAC	2024-07-15 08:02:26 -07:00
tso.c	net: tso: inline tso_count_descs()	2022-12-12 15:04:39 -08:00
utils.c
xdp.c	xdp: fix invalid wait context of page_pool_destroy()	2024-07-14 20:40:21 -07:00