rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...0: (0 ticks this GP) idle=e19c/1/0x4000000000000000 softirq=14485/14485 fqs=2100 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 0 0 0 ==> 52550(ms) rcu: (detected by 0, t=10506 jiffies, g=11089, q=419 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: events_unbound linkwatch_event RIP: 0010:_raw_spin_lock_irq+0x0/0x120 kernel/locking/spinlock.c:169 Code: 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 44 26 18 f5 e8 94 3d fd ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc90000a18d38 EFLAGS: 00000006 RAX: ffffffff81acd153 RBX: ffff8880b872c648 RCX: ffff88801d2bbc00 RDX: 0000000000010000 RSI: ffffffff8c608040 RDI: ffff8880b872c500 RBP: ffffc90000a18ea0 R08: ffffffff81acd136 R09: 1ffffffff203680e R10: dffffc0000000000 R11: fffffbfff203680f R12: 1ffff110170e58cb R13: 0000000000000001 R14: ffff888020f5a340 R15: ffff8880b872c500 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000600 CR3: 00000000281b8000 CR4: 0000000000350ef0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1742 [inline] __hrtimer_run_queues+0x670/0xd30 kernel/time/hrtimer.c:1802 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1864 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_count_sub+0x67/0x170 kernel/sched/core.c:5895 Code: 81 e1 ff ff ff 7f 39 d9 7c 27 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 5f 65 8b 05 db 2c 76 7e f7 db 65 01 1d d2 2c 76 7e 5b <41> 5e e9 8d 97 82 ff 90 e8 dc 46 57 03 85 c0 74 3a 48 c7 c0 14 73 RSP: 0018:ffffc90000106b00 EFLAGS: 00000293 RAX: 0000000080000202 RBX: ffffc90000106bf0 RCX: 0000000000000202 RDX: dffffc0000000000 RSI: ffffc90000100000 RDI: 0000000000000001 RBP: ffffc90000106be0 R08: ffffc90000107610 R09: ffffc90000106c30 R10: dffffc0000000000 R11: fffff52000020d88 R12: dffffc0000000000 R13: ffffc90000106be0 R14: dffffc0000000000 R15: ffffc90000107620 unwind_next_frame+0x18e6/0x22d0 arch/x86/kernel/unwind_orc.c:672 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 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 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kfree+0x196/0x430 mm/slub.c:4757 skb_kfree_head net/core/skbuff.c:1086 [inline] skb_free_head net/core/skbuff.c:1098 [inline] skb_release_data+0x6a0/0x8a0 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1436 netlink_broadcast_filtered+0x116d/0x12a0 net/netlink/af_netlink.c:1533 nlmsg_multicast_filtered include/net/netlink.h:1128 [inline] nlmsg_multicast include/net/netlink.h:1147 [inline] nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2586 fib6_add_rt2node net/ipv6/ip6_fib.c:1259 [inline] fib6_add+0x1e33/0x4420 net/ipv6/ip6_fib.c:1488 __ip6_ins_rt net/ipv6/route.c:1317 [inline] ip6_route_add+0x8b/0x160 net/ipv6/route.c:3857 addrconf_add_mroute net/ipv6/addrconf.c:2549 [inline] addrconf_add_dev+0x35b/0x540 net/ipv6/addrconf.c:2567 addrconf_dev_config net/ipv6/addrconf.c:3475 [inline] addrconf_init_auto_addrs+0x85f/0xeb0 net/ipv6/addrconf.c:3563 addrconf_notify+0xaff/0x1020 net/ipv6/addrconf.c:3736 notifier_call_chain+0x1a7/0x3f0 kernel/notifier.c:85 netdev_state_change+0x11f/0x1a0 net/core/dev.c:1506 linkwatch_do_dev+0x112/0x170 net/core/link_watch.c:186 __linkwatch_run_queue+0x44f/0x6c0 net/core/link_watch.c:243 linkwatch_event+0x4c/0x60 net/core/link_watch.c:286 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7ab/0x920 kernel/kthread.c:464 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244