rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=9b7c/1/0x4000000000000000 softirq=12737/12737 fqs=0
rcu: 	(t=10500 jiffies g=14193 q=78 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g14193 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=5051
rcu: rcu_preempt kthread starved for 10500 jiffies! g14193 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:26256 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17d3/0x4a20 kernel/sched/core.c:6736
 __schedule_loop kernel/sched/core.c:6813 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6828
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2572
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
CPU: 0 PID: 19836 Comm: syz-executor168 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x35/0x90 kernel/kcov.c:311
Code: 0c 25 80 ce 03 00 65 8b 05 20 d9 6e 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 57 83 b9 14 16 00 00 00 74 4e 8b 81 f0 15 00 00 <83> f8 03 75 43 48 8b 91 f8 15 00 00 44 8b 89 f4 15 00 00 49 c1 e1
RSP: 0018:ffffc9000bd76338 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88802b723c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000bd76430 R08: ffffffff8b0c37ad R09: 1ffffffff2598ea0
R10: dffffc0000000000 R11: fffffbfff2598ea1 R12: ffff88802be219d0
R13: dffffc0000000000 R14: ffff88802a7ad14a R15: ffff88802a7ad14e
FS:  00007f637d23e6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f637d23ed58 CR3: 0000000029942000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 rht_is_a_nulls include/linux/rhashtable.h:110 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:607 [inline]
 rhashtable_lookup include/linux/rhashtable.h:646 [inline]
 tipc_sk_lookup+0x38d/0x940 net/tipc/socket.c:3003
 tipc_sk_rcv+0x434/0x1d10 net/tipc/socket.c:2494
 tipc_node_xmit+0x1e1/0x1010 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x30d/0x450 net/tipc/node.c:1781
 tipc_sk_rcv+0x15e2/0x1d10 net/tipc/socket.c:2503
 tipc_node_xmit+0x1e1/0x1010 net/tipc/node.c:1701
 tipc_sk_push_backlog+0x513/0x930 net/tipc/socket.c:1316
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1370 [inline]
 tipc_sk_proto_rcv+0x9ec/0x1980 net/tipc/socket.c:2160
 tipc_sk_filter_rcv+0x3203/0x3480 net/tipc/socket.c:2354
 tipc_sk_enqueue net/tipc/socket.c:2447 [inline]
 tipc_sk_rcv+0x8b3/0x1d10 net/tipc/socket.c:2499
 tipc_node_xmit+0x1e1/0x1010 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x30d/0x450 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x1a2/0x230 net/tipc/socket.c:2414
 sk_backlog_rcv include/net/sock.h:1106 [inline]
 __release_sock+0x243/0x350 net/core/sock.c:2984
 release_sock+0x61/0x1f0 net/core/sock.c:3550
 sk_setsockopt+0xb19/0x3380
 do_sock_setsockopt+0x2fb/0x720 net/socket.c:2307
 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334
 __do_sys_setsockopt net/socket.c:2343 [inline]
 __se_sys_setsockopt net/socket.c:2340 [inline]
 __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f637d2a43a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f637d23e228 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f637d23e6c0 RCX: 00007f637d2a43a9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f637d32e338 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000020000540 R11: 0000000000000246 R12: 00007f637d32e330
R13: 00007f637d32e33c R14: 00007ffe6ff91bd0 R15: 00007ffe6ff91cb8
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19835 Comm: syz-executor168 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline]
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x603/0xc60 kernel/locking/qspinlock.c:511
Code: 89 dd c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 44 01 00 00 48 8b 04 24 c6 00 01 bb 00 80 ff ff eb 06 f3 90 ff c3 74 5d <41> 0f b6 04 14 84 c0 75 36 41 80 3f 00 75 eb 4c 89 ff be 02 00 00
RSP: 0018:ffffc9000bda7880 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 00000000ffffad08 RCX: ffff88802c298000
RDX: dffffc0000000000 RSI: ffffffff8baac220 RDI: ffffffff8bfec660
RBP: ffffc9000bda7978 R08: ffffffff92cc75cf R09: 1ffffffff2598eb9
R10: dffffc0000000000 R11: fffffbfff2598eba R12: 1ffff110057c42c0
R13: ffff8880b953efd4 R14: 1ffff110172a0001 R15: ffff88802be21600
FS:  00007f637d25f6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000029942000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3538
 lock_sock include/net/sock.h:1671 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1549
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f637d2a43a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f637d25f228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007f637d2a43a9
RDX: 0000000000000000 RSI: 0000000020000780 RDI: 0000000000000004
RBP: 00007f637d32e328 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f637d32e320
R13: 00007f637d32e32c R14: 00007ffe6ff91bd0 R15: 00007ffe6ff91cb8
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.108 msecs