rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P13821 P13823 0-.... } 3806 jiffies s: 80173 root: 0x1/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13817 Comm: syz.3.2364 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:mark_lock+0x7/0x320 kernel/locking/lockdep.c:4589
Code: 28 a7 1f 8e e8 6a 42 6d 00 4c 89 f7 41 89 d9 e9 79 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 41 57 41 56 41 55 <41> 54 53 50 89 d5 49 89 f6 48 89 fb 49 bd 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000006e18 EFLAGS: 00000002
RAX: ffff888055c7e404 RBX: ffffffff9046d7b9 RCX: 0000000000000000
RDX: 0000000000000005 RSI: ffff888055c7e5b0 RDI: ffff888055c7d940
RBP: ffffc90000007090 R08: dffffc0000000000 R09: fffffbfff215c44a
R10: fffffbfff215c44a R11: 1ffffffff215c449 R12: ffff888055c7d940
R13: 0000000000000008 R14: ffff888055c7e5b0 R15: ffff888055c7e5d0
FS:  00007faac12e36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32323ffc CR3: 000000006530d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 mark_usage kernel/locking/lockdep.c:-1 [inline]
 __lock_acquire+0xc69/0x7c50 kernel/locking/lockdep.c:5003
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 seqcount_lockdep_reader_access+0x108/0x1c0 include/linux/seqlock.h:102
 ktime_get_with_offset+0x90/0x320 kernel/time/timekeeping.c:889
 ktime_get_real include/linux/timekeeping.h:79 [inline]
 netif_rx_internal+0x398/0x560 net/core/dev.c:5023
 __netif_rx+0x74/0xb0 net/core/dev.c:5066
 veth_forward_skb drivers/net/veth.c:290 [inline]
 veth_xmit+0x650/0xb00 drivers/net/veth.c:343
 __netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 xmit_one net/core/dev.c:3670 [inline]
 dev_hard_start_xmit+0x262/0x870 net/core/dev.c:3686
 __dev_queue_xmit+0x1bf1/0x3760 net/core/dev.c:4346
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xda2/0x1590 net/ipv6/ip6_output.c:138
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbfb/0x1510 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:copy_from_kernel_nofault+0x0/0x310 mm/maccess.c:25
Code: 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 00 00 cc cc 00 00 cc cc 00 00 cc cc e8 1b 93 d4 ff b0 01 c3 0f 1f 84 00 00 00 00 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 10 49 89 d4 49 89 f7 49 89
RSP: 0018:ffffc90005597448 EFLAGS: 00000286
RAX: ffffffff81ec963c RBX: ffff88804822b680 RCX: 0000000000000ff0
RDX: 000000000000000d RSI: ffff888049e28360 RDI: ffff8880612a0ff0
RBP: ffff888073ed42f0 R08: dffffc0000000000 R09: fffffbfff215c45d
R10: fffffbfff215c45d R11: 1ffffffff215c45c R12: 0000000000000ff0
R13: 000000000000000d R14: ffff8880612a0ff0 R15: ffff888049e28360
 prepend_copy fs/d_path.c:49 [inline]
 prepend fs/d_path.c:75 [inline]
 prepend_name fs/d_path.c:100 [inline]
 __prepend_path fs/d_path.c:132 [inline]
 prepend_path+0x565/0xc20 fs/d_path.c:171
 d_absolute_path+0x9e/0x140 fs/d_path.c:233
 tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
 tomoyo_realpath_from_path+0x2d5/0x5d0 security/tomoyo/realpath.c:271
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1e3/0x600 security/tomoyo/file.c:723
 tomoyo_path_mknod+0x13f/0x180 security/tomoyo/tomoyo.c:239
 security_path_mknod+0xec/0x140 security/security.c:1166
 may_o_create fs/namei.c:3304 [inline]
 lookup_open fs/namei.c:3445 [inline]
 open_last_lookups fs/namei.c:3550 [inline]
 path_openat+0xb29/0x2e70 fs/namei.c:3780
 do_filp_open+0x1c1/0x3c0 fs/namei.c:3810
 do_sys_openat2+0x142/0x490 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faac038ebe9
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:00007faac12e3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007faac05c5fa0 RCX: 00007faac038ebe9
RDX: 00000000000026e1 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007faac0411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faac05c6038 R14: 00007faac05c5fa0 R15: 00007ffde8db3588
 </TASK>