rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4081 1-.... } 4341 jiffies s: 5577 root: 0x2/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4081 Comm: syz.0.40 Not tainted 6.1.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x28/0x80 kernel/kcov.c:304
Code: 1f 00 4c 8b 04 24 65 48 8b 15 44 d0 77 7e 65 8b 05 45 d0 77 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 5b 83 ba 1c 16 00 00 00 <74> 52 8b 82 f8 15 00 00 83 f8 03 75 47 48 8b 8a 00 16 00 00 44 8b
RSP: 0018:ffffc900001dfb78 EFLAGS: 00000046
RAX: 0000000000010102 RBX: 0000000000000001 RCX: 0000000000010102
RDX: ffff888024b79dc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001dfcb0 R08: ffffffff81b43698 R09: fffffbfff20e7245
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200003bf80 R14: 0000000000000008 R15: ffffc900001dfd00
FS:  00007f71cb8976c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020034000 CR3: 0000000054752000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __perf_output_begin kernel/events/ring_buffer.c:170 [inline]
 perf_output_begin_forward+0x1c8/0xaf0 kernel/events/ring_buffer.c:271
 __perf_event_output kernel/events/core.c:7670 [inline]
 perf_event_output_forward+0x1e5/0x330 kernel/events/core.c:7688
 __perf_event_overflow+0x45e/0x640 kernel/events/core.c:9436
 perf_swevent_hrtimer+0x38e/0x4f0 kernel/events/core.c:10844
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:preempt_count_sub+0x0/0x160 kernel/sched/core.c:5732
Code: ff 48 c7 c1 a8 f1 99 8e 80 e1 07 80 c1 03 38 c1 7c 80 48 c7 c7 a8 f1 99 8e e8 5c c0 83 00 e9 6f ff ff ff 0f 1f 80 00 00 00 00 <41> 56 53 89 fb 48 c7 c0 60 11 f3 91 48 c1 e8 03 49 be 00 00 00 00
RSP: 0018:ffffc900001e03f8 EFLAGS: 00000206
RAX: ffffc900001e1000 RBX: ffffc900001e04f0 RCX: ffffc900001e0ea8
RDX: dffffc0000000000 RSI: ffffc900001d9000 RDI: 0000000000000001
RBP: ffffc900001e04e0 R08: ffffc900001e0e90 R09: ffffc900001e0530
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001e04e0
R13: ffffffff8f18dd54 R14: ffffc900001d9000 R15: ffffc900001e0ea0
 unwind_next_frame+0x1a3f/0x2220 arch/x86/kernel/unwind_orc.c:629
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:556 [inline]
 dst_cow_metrics_generic+0x52/0x1b0 net/core/dst.c:195
 dst_metrics_write_ptr include/net/dst.h:119 [inline]
 dst_metric_set include/net/dst.h:180 [inline]
 icmp6_dst_alloc+0x2bf/0x470 net/ipv6/route.c:3282
 ndisc_send_skb+0x344/0x14e0 net/ipv6/ndisc.c:489
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3962
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 do_softirq+0x162/0x240 kernel/softirq.c:472
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1b1/0x1f0 kernel/softirq.c:396
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 __icmp_send+0xd8b/0x1530 net/ipv4/icmp.c:774
 icmp_send include/net/icmp.h:43 [inline]
 ip_fragment+0x181/0x220 net/ipv4/ip_output.c:587
 ip_finish_output_gso net/ipv4/ip_output.c:279 [inline]
 __ip_finish_output+0x2bd/0x4b0 net/ipv4/ip_output.c:301
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x11b1/0x1b60 net/ipv4/ip_output.c:532
 __tcp_transmit_skb+0x1e33/0x33a0 net/ipv4/tcp_output.c:1403
 tcp_transmit_skb net/ipv4/tcp_output.c:1421 [inline]
 tcp_write_xmit+0x1a60/0x64c0 net/ipv4/tcp_output.c:2709
 __tcp_push_pending_frames+0x97/0x350 net/ipv4/tcp_output.c:2894
 tcp_sendmsg_locked+0x21de/0x4100 net/ipv4/tcp.c:1440
 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1489
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2597
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f71cab77299
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71cb897048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f71cad05f80 RCX: 00007f71cab77299
RDX: 00000000000052cc RSI: 0000000020000040 RDI: 000000000000000d
RBP: 00007f71cabe48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f71cad05f80 R15: 00007ffd0555b218
 </TASK>