BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 10097, name: syz.3.1114 preempt_count: 1, expected: 0 RCU nest depth: 2, expected: 2 4 locks held by syz.3.1114/10097: #0: ffffffff8e1c8180 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e1c8180 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e1c8180 (rcu_read_lock){....}-{1:3}, at: nf_hook+0xa1/0x3a0 include/linux/netfilter.h:242 #1: ffffffff8e05f300 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163 #2: ffffffff8e1c8180 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163 #3: ffff88803c2c68f0 (&cp->lock#2){+...}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline] #3: ffff88803c2c68f0 (&cp->lock#2){+...}-{3:3}, at: ip_vs_conn_hash net/netfilter/ipvs/ip_vs_conn.c:272 [inline] #3: ffff88803c2c68f0 (&cp->lock#2){+...}-{3:3}, at: ip_vs_conn_new+0x14fe/0x25f0 net/netfilter/ipvs/ip_vs_conn.c:1448 Preemption disabled at: [] bit_spin_lock include/linux/bit_spinlock.h:38 [inline] [] hlist_bl_lock+0x18/0x110 include/linux/list_bl.h:149 CPU: 0 UID: 0 PID: 10097 Comm: syz.3.1114 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x329/0x480 kernel/sched/core.c:9163 __rt_spin_lock kernel/locking/spinlock_rt.c:48 [inline] rt_spin_lock+0xc2/0x400 kernel/locking/spinlock_rt.c:57 spin_lock include/linux/spinlock_rt.h:45 [inline] ip_vs_conn_hash net/netfilter/ipvs/ip_vs_conn.c:272 [inline] ip_vs_conn_new+0x14fe/0x25f0 net/netfilter/ipvs/ip_vs_conn.c:1448 ip_vs_sched_persist net/netfilter/ipvs/ip_vs_core.c:549 [inline] ip_vs_schedule+0x10fd/0x1d70 net/netfilter/ipvs/ip_vs_core.c:686 udp_conn_schedule+0x391/0x7a0 net/netfilter/ipvs/ip_vs_proto_udp.c:78 ip_vs_try_to_schedule net/netfilter/ipvs/ip_vs_core.c:1657 [inline] ip_vs_in_hook+0xc50/0x1bf0 net/netfilter/ipvs/ip_vs_core.c:2229 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook+0x22a/0x3a0 include/linux/netfilter.h:273 __ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120 ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129 ip_send_skb+0x45/0xc0 net/ipv4/ip_output.c:1508 udp_send_skb+0x7e4/0xf70 net/ipv4/udp.c:1161 udp_sendmsg+0x1937/0x21a0 net/ipv4/udp.c:1443 udpv6_sendmsg+0x996/0x25c0 net/ipv6/udp.c:1523 sock_sendmsg_nosec+0x90/0x150 net/socket.c:797 __sock_sendmsg net/socket.c:812 [inline] ____sys_sendmsg+0x55c/0x870 net/socket.c:2716 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2770 __sys_sendmsg net/socket.c:2802 [inline] __do_sys_sendmsg net/socket.c:2807 [inline] __se_sys_sendmsg net/socket.c:2805 [inline] __x64_sys_sendmsg+0x1c3/0x2a0 net/socket.c:2805 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fae19e3cdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae1808e028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fae1a0b5fa0 RCX: 00007fae19e3cdd9 RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000000000000006 RBP: 00007fae19ed2d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae1a0b6038 R14: 00007fae1a0b5fa0 R15: 00007fff79d79608