BUG: MAX_LOCK_DEPTH too low! turning off the locking correctness validator. depth: 48 max: 48! 48 locks held by kworker/u4:1/144: #0: ffff88807c9bd138 ((wq_completion)wg-kex-wg0#7){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1 #1: ffffc900016efd00 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285 #2: ffff88801c36d5d8 (&peer->endpoint_lock){++-.}-{2:2}, at: wg_socket_send_skb_to_peer+0x50/0x1c0 drivers/net/wireguard/socket.c:173 #3: ffffffff8c31efc0 (rcu_read_lock_bh){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:313 #4: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #5: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #6: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #7: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #8: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #9: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #10: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #11: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #12: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #13: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #14: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #15: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #16: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #17: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #18: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #19: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #20: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #21: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #22: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #23: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #24: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #25: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #26: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #27: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #28: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #29: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #30: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #31: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #32: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #33: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #34: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #35: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #36: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #37: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #38: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #39: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #40: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #41: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #42: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #43: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #44: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #45: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #46: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 #47: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:313 INFO: lockdep is turned off. CPU: 1 PID: 144 Comm: kworker/u4:1 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 __lock_acquire+0x1247/0x7b50 kernel/locking/lockdep.c:-1 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313 rcu_read_lock include/linux/rcupdate.h:740 [inline] ip6_dst_check+0xe2/0x7a0 net/ipv6/route.c:2744 dst_cache_per_cpu_get+0x1a3/0x310 net/core/dst_cache.c:51 rpl_output+0x165/0x730 net/ipv6/rpl_iptunnel.c:214 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 dst_output include/net/dst.h:452 [inline] rpl_output+0x31f/0x730 net/ipv6/rpl_iptunnel.c:250 lwtunnel_output+0x27e/0x440 net/core/lwtunnel.c:342 ip6tunnel_xmit include/net/ip6_tunnel.h:160 [inline] udp_tunnel6_xmit_skb+0x4b7/0x8b0 net/ipv6/ip6_udp_tunnel.c:110 send6+0x5a0/0x8d0 drivers/net/wireguard/socket.c:152 wg_socket_send_skb_to_peer+0x10d/0x1c0 drivers/net/wireguard/socket.c:178 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x203/0x360 drivers/net/wireguard/send.c:51 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287