rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 3694 jiffies s: 1513 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3771 Comm: syz.3.16 Not tainted 6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:seqcount_lockdep_reader_access+0x1b8/0x220
Code: 68 00 4c 8b 74 24 20 bb 00 02 00 00 be 00 02 00 00 4c 21 f6 31 ff e8 77 8f 10 00 4c 21 f3 75 11 e8 8d 8b 10 00 4d 85 ed 75 16 <e8> 83 8b 10 00 eb 15 e8 7c 8b 10 00 e8 17 53 2b 09 4d 85 ed 74 ea
RSP: 0018:ffffc900001dfe60 EFLAGS: 00000046
RAX: ffffffff817a1833 RBX: 0000000000000000 RCX: ffff888027ee9dc0
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001dff20 R08: ffffffff817a1829 R09: fffffbfff1d33a7e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000046 R15: 1ffff9200003bfcc
FS:  00007f49f867f6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002008a000 CR3: 0000000019f5e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
 ktime_get+0x7f/0x270 kernel/time/timekeeping.c:848
 clockevents_program_event+0xe1/0x310 kernel/time/clockevents.c:326
 hrtimer_interrupt+0x546/0x980 kernel/time/hrtimer.c:1825
 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:unwind_next_frame+0x6ef/0x2220
Code: 03 80 3c 38 00 74 0e 49 89 fe 48 89 df e8 79 73 a5 00 4c 89 f7 48 8b 1b 48 85 db 0f 84 1c 0b 00 00 48 83 c3 70 e9 e8 01 00 00 <4c> 8b 24 24 49 8d 5c 24 40 48 89 d8 48 c1 e8 03 80 3c 38 00 74 0e
RSP: 0018:ffffc900001e01a0 EFLAGS: 00000293
RAX: 0000000000000002 RBX: 0000000000000004 RCX: ffffffff8ef71068
RDX: ffffffff8f8a1e88 RSI: ffffffff8891bb54 RDI: dffffc0000000000
RBP: ffffffff8f8a1e88 R08: 0000000000000003 R09: ffffc900001e0370
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffff8f8a1e8c R14: ffffffff8ef71064 R15: 1ffffffff1f143d1
 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]
 kzalloc include/linux/slab.h:692 [inline]
 ref_tracker_alloc+0x13c/0x470 lib/ref_tracker.c:85
 __netdev_tracker_alloc include/linux/netdevice.h:4008 [inline]
 netdev_hold include/linux/netdevice.h:4037 [inline]
 dst_init+0xee/0x440 net/core/dst.c:52
 dst_alloc+0x155/0x190 net/core/dst.c:92
 ip6_dst_alloc net/ipv6/route.c:345 [inline]
 icmp6_dst_alloc+0x7b/0x470 net/ipv6/route.c:3269
 ndisc_send_skb+0x344/0x14e0 net/ipv6/ndisc.c:491
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3963
 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 kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:rcu_read_unlock_special+0x84/0x540 kernel/rcu/tree_plugin.h:682
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 1d 48 8e 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0018:ffffc900046df2e0 EFLAGS: 00000206
RAX: 359b22fa79e20700 RBX: 1ffff920008dbe64 RCX: ffffffff816ae04a
RDX: dffffc0000000000 RSI: ffffffff8b0c0260 RDI: ffffffff8b5d62c0
RBP: ffffc900046df3a8 R08: dffffc0000000000 R09: fffffbfff20e7645
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8d32fe00
R13: ffff888027eea218 R14: ffffc900046df320 R15: 1ffff920008dbe60
 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 page_ext_put+0x91/0xb0 mm/page_ext.c:182
 page_table_check_pte_set include/linux/page_table_check.h:83 [inline]
 set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline]
 do_anonymous_page mm/memory.c:4214 [inline]
 handle_pte_fault mm/memory.c:5011 [inline]
 __handle_mm_fault mm/memory.c:5155 [inline]
 handle_mm_fault+0x5203/0x5340 mm/memory.c:5276
 do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
 handle_page_fault arch/x86/mm/fault.c:1431 [inline]
 exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 <f3> a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900046df7d8 EFLAGS: 00050206
RAX: ffffffff8436f501 RBX: 0000000000008000 RCX: 0000000000006140
RDX: 0000000000008000 RSI: 000000002008a000 RDI: ffff888076211ec0
RBP: ffffc900046df930 R08: dffffc0000000000 R09: ffffed100ec43000
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888076210000
R13: 1ffff920008dbf7b R14: 0000000000008000 R15: dffffc0000000000
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
 copyin lib/iov_iter.c:183 [inline]
 _copy_from_iter+0x2c2/0xff0 lib/iov_iter.c:631
 copy_from_iter include/linux/uio.h:187 [inline]
 copy_from_iter_full include/linux/uio.h:194 [inline]
 skb_do_copy_data_nocache include/net/sock.h:2311 [inline]
 skb_copy_to_page_nocache include/net/sock.h:2337 [inline]
 kcm_sendmsg+0xb8a/0x2580 net/kcm/kcmsock.c:995
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x394/0x4e0 net/socket.c:1143
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x857/0xbc0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 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: 0033:0x7f49f7979e79
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:00007f49f867f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f49f7b15f80 RCX: 00007f49f7979e79
RDX: 00000000fffffdef RSI: 0000000020000140 RDI: 0000000000000007
RBP: 00007f49f79e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f49f7b15f80 R15: 00007ffe8fbdd638
 </TASK>