rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (0 ticks this GP) idle=f1a4/1/0x4000000000000000 softirq=19294/19294 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0        52527   ==> 52510(ms)
rcu: 	(detected by 0, t=10502 jiffies, g=14921, q=1952 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6450 Comm: syz-executor Not tainted 6.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4842 [inline]
RIP: 0010:__lock_acquire+0x762/0x8080 kernel/locking/lockdep.c:5152
Code: 4c 8b 7c 24 50 41 89 dd ff cb 0f 88 b2 00 00 00 41 89 de 83 fb 31 0f 83 88 00 00 00 4b 8d 04 b6 48 8b 4c 24 30 4c 8d 74 c1 20 <4c> 89 f0 48 c1 e8 03 42 0f b6 04 00 84 c0 75 24 45 8b 36 48 8b 44
RSP: 0018:ffffc90000a087e0 EFLAGS: 00000087
RAX: 000000000000000a RBX: 0000000000000002 RCX: ffff88807fd9c6e0
RDX: 000000000000000f RSI: 0000000000000008 RDI: ffffffff93850700
RBP: ffffc90000a08aa8 R08: dffffc0000000000 R09: 1ffffffff270a0e0
R10: dffffc0000000000 R11: fffffbfff270a0e1 R12: ffff88807fd9c6d8
R13: 0000000000000003 R14: ffff88807fd9c750 R15: ffff88807fd9bc00
FS:  000055556f14e500(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0d36c6f98 CR3: 0000000027098000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x540 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x67/0x3a0 lib/debugobjects.c:763
 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
 debug_deactivate+0x1b/0x210 kernel/time/hrtimer.c:484
 __run_hrtimer kernel/time/hrtimer.c:1659 [inline]
 __hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x410 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:arch_stack_walk+0x102/0x150 arch/x86/kernel/stacktrace.c:27
Code: ff ff 4c 89 e6 4c 89 fa e8 9b aa 09 00 83 bd 70 ff ff ff 00 74 37 48 8d 9d 70 ff ff ff 48 89 df e8 43 81 09 00 48 85 c0 74 23 <4c> 89 f7 48 89 c6 4d 89 eb 41 ff d3 66 90 84 c0 74 11 48 89 df e8
RSP: 0018:ffffc900044f6100 EFLAGS: 00000282
RAX: ffffffff89663e16 RBX: ffffc900044f6100 RCX: ffffffff90e26000
RDX: ffffffff90fd0b01 RSI: ffffc900044f0000 RDI: ffffffff89663e16
RBP: ffffc900044f6190 R08: ffffc900044f7a50 R09: 0000000000000000
R10: ffffc900044f6150 R11: fffff5200089ec2c R12: ffff88807fd9bc00
R13: ffffffff817ea150 R14: ffffc900044f61e0 R15: 0000000000000000
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x4b/0x60 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_noprof+0x12a/0x270 mm/slub.c:4141
 node_alloc net/ipv6/ip6_fib.c:188 [inline]
 fib6_add_1+0x685/0x1390 net/ipv6/ip6_fib.c:843
 fib6_add+0x1ff/0x43c0 net/ipv6/ip6_fib.c:1410
 __ip6_ins_rt net/ipv6/route.c:1314 [inline]
 ip6_route_add+0x88/0x130 net/ipv6/route.c:3857
 addrconf_prefix_route net/ipv6/addrconf.c:2486 [inline]
 add_v4_addrs+0xb5a/0x1160 net/ipv6/addrconf.c:3271
 addrconf_sit_config net/ipv6/addrconf.c:3521 [inline]
 addrconf_init_auto_addrs+0x363/0xea0 net/ipv6/addrconf.c:3558
 addrconf_notify+0xaff/0x1010 net/ipv6/addrconf.c:3745
 notifier_call_chain+0x19f/0x3d0 kernel/notifier.c:93
 __dev_notify_flags+0x207/0x400
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
 do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
 __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
 rtnl_newlink+0x180b/0x20a0 net/core/rtnetlink.c:3772
 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8dd/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f479d7805ac
Code: 2a 5a 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5a 02 00 48 8b
RSP: 002b:00007ffe524bdd10 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f479e464620 RCX: 00007f479d7805ac
RDX: 0000000000000020 RSI: 00007f479e464670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe524bdd64 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f479e464670 R15: 0000000000000000
 </TASK>