rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=d9f/1/0x4000000000000002 softirq=11532/11533 fqs=2098 
	(detected by 1, t=10502 jiffies, g=14705, q=2614)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6173 Comm: syz.2.478 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x80 kernel/kcov.c:294
Code: 28 4d 39 ca 77 22 89 ff 89 f6 4a c7 44 02 08 03 00 00 00 4a 89 7c 02 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a c3 90 <48> 8b 04 24 65 48 8b 0d 44 36 89 7e 65 8b 15 45 36 89 7e 81 e2 00
RSP: 0018:ffffc90000006ff0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff88804d030000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff203ac18
R10: dffffc0000000000 R11: fffffbfff203ac19 R12: dffffc0000000000
R13: ffff888018984280 R14: 0000000000000010 R15: ffff888018984368
FS:  00007f2b8e1476c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557418f4e8 CR3: 000000002a86e000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_read_unlock include/linux/rcupdate.h:769 [inline]
 __task_pid_nr_ns+0x2df/0x420 kernel/pid.c:501
 perf_event_pid_type kernel/events/core.c:1446 [inline]
 perf_event_tid kernel/events/core.c:1460 [inline]
 __perf_event_header__init_id+0x20b/0x500 kernel/events/core.c:7106
 perf_prepare_sample+0x158/0x1cd0 kernel/events/core.c:7624
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 d2 df 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900000077a0 EFLAGS: 00000206
RAX: 24ef6394a827ec00 RBX: 1ffff92000000ef8 RCX: 24ef6394a827ec00
RDX: dffffc0000000000 RSI: ffffffff8a2b3100 RDI: ffffffff8a7a0700
RBP: ffffc90000007880 R08: ffffffff901d60f7 R09: 1ffffffff203ac1e
R10: dffffc0000000000 R11: fffffbfff203ac1f R12: ffffffff8c323800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 netif_receive_skb_list_internal+0x961/0xbd0 net/core/dev.c:5786
 gro_normal_list net/core/dev.c:5939 [inline]
 napi_complete_done+0x378/0x850 net/core/dev.c:6677
 virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
 virtnet_poll+0x955/0xf40 drivers/net/virtio_net.c:1624
 __napi_poll+0xc0/0x430 net/core/dev.c:7101
 napi_poll net/core/dev.c:7168 [inline]
 net_rx_action+0x4d4/0xa10 net/core/dev.c:7258
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 common_interrupt+0xb5/0xd0 arch/x86/kernel/irq.c:242
 </IRQ>
 <TASK>
 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:finish_lock_switch+0x134/0x280 kernel/sched/core.c:4804
Code: be ff ff ff ff e8 dc 50 68 08 85 c0 74 4a 4d 85 ff 75 66 0f 1f 44 00 00 48 89 df e8 86 bc 71 08 e8 81 e6 2a 00 fb 48 83 c4 08 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 c9 09 fe ff 43 80 3c
RSP: 0018:ffffc90002fbeb08 EFLAGS: 00000282
RAX: 24ef6394a827ec00 RBX: ffff8880b903a340 RCX: 24ef6394a827ec00
RDX: dffffc0000000000 RSI: ffffffff8a2b3100 RDI: ffffffff8a7a0700
RBP: 1ffff11017207613 R08: ffffffff901d60f7 R09: 1ffffffff203ac1e
R10: dffffc0000000000 R11: fffffbfff203ac1f R12: 1ffff110172075c1
R13: dffffc0000000000 R14: ffff8880b903ae08 R15: 0000000000000000
 finish_task_switch+0x12f/0x640 kernel/sched/core.c:4921
 context_switch kernel/sched/core.c:5052 [inline]
 __schedule+0x11f7/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__handle_mm_fault mm/memory.c:4755 [inline]
RIP: 0010:handle_mm_fault+0xc34/0x4410 mm/memory.c:4883
Code: ff ff 4c 89 e7 e8 6c e8 0f 00 e9 8d fe ff ff e8 a2 c9 ca ff bb 01 00 00 00 e9 d8 1d 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <4c> 8b 74 24 08 74 08 48 89 df e8 4d e8 0f 00 48 8b 1b 48 89 de 48
RSP: 0018:ffffc90002fbeee0 EFLAGS: 00000246
RAX: 1ffff1100ce43800 RBX: ffff88806721c000 RCX: ffff88804d030000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002fbf0a0 R08: ffffc90002fbf007 R09: ffffc90002fbefc4
R10: dffffc0000000000 R11: fffff520005f7e01 R12: 000000006721c001
R13: dffffc0000000000 R14: 000000006721c067 R15: 0000000000000000
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
 handle_page_fault arch/x86/mm/fault.c:1443 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0010:csum_partial_copy_generic+0x6b/0x1e0 arch/x86/lib/csum-copy_64.S:85
Code: 7b f8 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 1f 4c 8b 47 08 4c 8b 5f 10 48 8b 57 18 4c 8b 57 20 4c 8b 7f 28 4c 8b 77 30 <4c> 8b 6f 38 0f 18 8f 40 01 00 00 48 11 d8 4c 11 c0 4c 11 d8 48 11
RSP: 0018:ffffc90002fbf238 EFLAGS: 00050206
RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000598
RDX: 0000000000000000 RSI: ffff8880262e01d0 RDI: 0000200000003fc8
RBP: 0000200000004460 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000012
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 csum_and_copy_from_user+0xdf/0x120 arch/x86/lib/csum-wrappers_64.c:31
 csum_and_copy_from_iter+0x247/0x1120 lib/iov_iter.c:1705
 csum_and_copy_from_iter_full include/linux/uio.h:299 [inline]
 ip_generic_getfrag+0x14f/0x2d0 net/ipv4/ip_output.c:946
 __ip6_append_data+0x2ada/0x38c0 net/ipv6/ip6_output.c:1704
 ip6_append_data+0x1d4/0x310 net/ipv6/ip6_output.c:1837
 rawv6_sendmsg+0x1222/0x1700 net/ipv6/raw.c:954
 sock_sendmsg_nosec net/socket.c:706 [inline]
 __sock_sendmsg net/socket.c:718 [inline]
 ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2499
 __sys_sendmsg net/socket.c:2528 [inline]
 __do_sys_sendmsg net/socket.c:2537 [inline]
 __se_sys_sendmsg+0x1af/0x290 net/socket.c:2535
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2b8feede59
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:00007f2b8e147028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2b90166fa0 RCX: 00007f2b8feede59
RDX: 0000000000000060 RSI: 0000200000000080 RDI: 0000000000000005
RBP: 00007f2b8ff83d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2b90167038 R14: 00007f2b90166fa0 R15: 00007fffb1580c58
 </TASK>