Pablo Neira Ayuso 120f1c857a net: flow_dissector: use DEBUG_NET_WARN_ON_ONCE ... The following splat is easy to reproduce upstream as well as in -stable kernels. Florian Westphal provided the following commit: d1dab4f71d ("net: add and use __skb_get_hash_symmetric_net") but this complementary fix has been also suggested by Willem de Bruijn and it can be easily backported to -stable kernel which consists in using DEBUG_NET_WARN_ON_ONCE instead to silence the following splat given __skb_get_hash() is used by the nftables tracing infrastructure to to identify packets in traces. [69133.561393] ------------[ cut here ]------------ [69133.561404] WARNING: CPU: 0 PID: 43576 at net/core/flow_dissector.c:1104 __skb_flow_dissect+0x134f/ [...] [69133.561944] CPU: 0 PID: 43576 Comm: socat Not tainted 6.10.0-rc7+ #379 [69133.561959] RIP: 0010:__skb_flow_dissect+0x134f/0x2ad0 [69133.561970] Code: 83 f9 04 0f 84 b3 00 00 00 45 85 c9 0f 84 aa 00 00 00 41 83 f9 02 0f 84 81 fc ff ff 44 0f b7 b4 24 80 00 00 00 e9 8b f9 ff ff <0f> 0b e9 20 f3 ff ff 41 f6 c6 20 0f 84 e4 ef ff ff 48 8d 7b 12 e8 [69133.561979] RSP: 0018:ffffc90000006fc0 EFLAGS: 00010246 [69133.561988] RAX: 0000000000000000 RBX: ffffffff82f33e20 RCX: ffffffff81ab7e19 [69133.561994] RDX: dffffc0000000000 RSI: ffffc90000007388 RDI: ffff888103a1b418 [69133.562001] RBP: ffffc90000007310 R08: 0000000000000000 R09: 0000000000000000 [69133.562007] R10: ffffc90000007388 R11: ffffffff810cface R12: ffff888103a1b400 [69133.562013] R13: 0000000000000000 R14: ffffffff82f33e2a R15: ffffffff82f33e28 [69133.562020] FS: 00007f40f7131740(0000) GS:ffff888390800000(0000) knlGS:0000000000000000 [69133.562027] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [69133.562033] CR2: 00007f40f7346ee0 CR3: 000000015d200001 CR4: 00000000001706f0 [69133.562040] Call Trace: [69133.562044] <IRQ> [69133.562049] ? __warn+0x9f/0x1a0 [ 1211.841384] ? __skb_flow_dissect+0x107e/0x2860 [...] [ 1211.841496] ? bpf_flow_dissect+0x160/0x160 [ 1211.841753] __skb_get_hash+0x97/0x280 [ 1211.841765] ? __skb_get_hash_symmetric+0x230/0x230 [ 1211.841776] ? mod_find+0xbf/0xe0 [ 1211.841786] ? get_stack_info_noinstr+0x12/0xe0 [ 1211.841798] ? bpf_ksym_find+0x56/0xe0 [ 1211.841807] ? __rcu_read_unlock+0x2a/0x70 [ 1211.841819] nft_trace_init+0x1b9/0x1c0 [nf_tables] [ 1211.841895] ? nft_trace_notify+0x830/0x830 [nf_tables] [ 1211.841964] ? get_stack_info+0x2b/0x80 [ 1211.841975] ? nft_do_chain_arp+0x80/0x80 [nf_tables] [ 1211.842044] nft_do_chain+0x79c/0x850 [nf_tables] Fixes: 9b52e3f267 ("flow_dissector: handle no-skb use case") Suggested-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20240715141442.43775-1-pablo@netfilter.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>		2024-07-18 10:52:17 +02:00
..
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	netdevice: define and allocate &net_device _properly_	2024-07-11 18:11:31 -07:00
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: Remove tst_run from lwt_seg6local_prog_ops.	2024-07-10 09:58:52 -07:00
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: add netdev_set_operstate() helper	2024-02-14 11:20:13 +00:00
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	net/neighbour: constify ctl_table arguments of utility function	2024-05-28 19:49:47 -07:00
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	net: reduce rtnetlink_rcv_msg() stack usage	2024-07-11 17:13:58 -07:00
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	net: make net.core.{r,w}mem_{default,max} namespaced	2024-06-01 16:03:21 -07:00
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	net: core: inet[46]_pton strlen len types	2022-11-01 21:14:39 -07:00
xdp.c	xdp: fix invalid wait context of page_pool_destroy()	2024-07-14 20:40:21 -07:00