rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10763 ticks this GP) idle=fffc/1/0x4000000000000000 softirq=40572/40575 fqs=5212 rcu: hardirqs softirqs csw/system rcu: number: 1595505 0 0 rcu: cputime: 17370 35119 38 ==> 52500(ms) rcu: (t=10501 jiffies g=48177 q=1319 ncpus=2) CPU: 0 PID: 10994 Comm: syz.2.1351 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:unwind_next_frame+0x130/0x2970 arch/x86/kernel/unwind_orc.c:-1 Code: 89 de 83 e6 03 31 ff e8 8e ef 4a 00 83 e3 03 74 1b e8 64 ec 4a 00 e9 f7 20 00 00 e8 5a ec 4a 00 e9 26 21 00 00 e8 50 ec 4a 00 05 e8 49 ec 4a 00 4c 89 7c 24 78 4d 8d 74 24 35 4c 89 f0 48 c1 RSP: 0018:ffffc90000006f98 EFLAGS: 00000246 RAX: ffffffff813aa470 RBX: 1ffff92000000e0d RCX: ffff88805c4a5a00 RDX: 0000000000000100 RSI: 0000000000000002 RDI: 0000000000000001 RBP: ffffc900000070b8 R08: ffffc90000007130 R09: 0000000000000009 R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000007068 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff81754427 FS: 00007f6bf494a6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 0000000066c3c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2721 [inline] call_rcu+0x158/0x930 kernel/rcu/tree.c:2837 refdst_drop include/net/dst.h:270 [inline] skb_dst_drop include/net/dst.h:282 [inline] __dev_queue_xmit+0x90b/0x35a0 net/core/dev.c:4380 neigh_output include/net/neighbour.h:543 [inline] ip6_finish_output2+0xe2e/0x1650 net/ipv6/ip6_output.c:141 dst_output include/net/dst.h:467 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] ndisc_send_skb+0xbed/0x14b0 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x52d/0x7d0 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:unwind_next_frame+0x14d/0x2970 arch/x86/kernel/unwind_orc.c:494 Code: ec 4a 00 e9 26 21 00 00 e8 50 ec 4a 00 eb 05 e8 49 ec 4a 00 4c 89 7c 24 78 4d 8d 74 24 35 4c 89 f0 48 c1 e8 03 48 89 44 24 38 <42> 0f b6 04 28 84 c0 48 8b 5c 24 20 0f 85 64 21 00 00 45 0f b6 3e RSP: 0018:ffffc9000472f1d8 EFLAGS: 00000a03 RAX: 1ffff920008e5e5b RBX: 1ffff920008e5e55 RCX: ffff88805c4a5a00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff813aa3fe RBP: ffffc9000472f2f8 R08: ffffc9000472f370 R09: 000000000000000a R10: 0000000000000004 R11: 0000000000000000 R12: ffffc9000472f2a8 R13: dffffc0000000000 R14: ffffc9000472f2dd R15: ffffffff81949718 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] kmem_cache_alloc_node+0x150/0x330 mm/slub.c:3540 alloc_vmap_area+0x1c4/0x1c70 mm/vmalloc.c:1611 __get_vm_area_node+0x162/0x370 mm/vmalloc.c:2620 __vmalloc_node_range+0x36e/0x1320 mm/vmalloc.c:3299 __vmalloc_node mm/vmalloc.c:3404 [inline] __vmalloc+0x7a/0x90 mm/vmalloc.c:3418 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2681 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5473 __do_sys_bpf kernel/bpf/syscall.c:5577 [inline] __se_sys_bpf kernel/bpf/syscall.c:5575 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f6bf3b8f749 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:00007f6bf494a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6bf3de5fa0 RCX: 00007f6bf3b8f749 RDX: 0000000000000090 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007f6bf3c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6bf3de6038 R14: 00007f6bf3de5fa0 R15: 00007ffefa032838