rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (9892 ticks this GP) idle=973c/1/0x4000000000000000 softirq=35462/35462 fqs=4853 rcu: hardirqs softirqs csw/system rcu: number: 1149033 0 0 rcu: cputime: 18663 33816 46 ==> 52500(ms) rcu: (t=10502 jiffies g=45205 q=2548 ncpus=2) CPU: 0 PID: 10415 Comm: syz.4.1279 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212 Code: 00 0f 0b 0f 1f 80 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d dc ef c4 0c 48 89 de 5b e9 13 9e 56 00 cc cc cc 0f 1e fa 48 8b 04 24 65 48 8b 0d 30 15 7e 7e 65 8b 15 31 15 7e RSP: 0018:ffffc90000007470 EFLAGS: 00000293 RAX: ffffffff8e5d1368 RBX: ffffffff8e5d1384 RCX: ffff888018f0bc00 RDX: 0000000000000100 RSI: ffffffff81747cdb RDI: ffffffff81747c2c RBP: ffffffff8e5d136c R08: ffffc90000007610 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8e5d1370 R13: ffffffff81747c2c R14: ffffffff81747cdb R15: ffffffff8e5d136c FS: 00007f7ed9f796c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 0000000066f16000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __orc_find arch/x86/kernel/unwind_orc.c:99 [inline] orc_find arch/x86/kernel/unwind_orc.c:227 [inline] unwind_next_frame+0x4d9/0x2970 arch/x86/kernel/unwind_orc.c:494 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 kmalloc_reserve+0x95/0x240 net/core/skbuff.c:562 __alloc_skb+0x138/0x2c0 net/core/skbuff.c:653 alloc_skb include/linux/skbuff.h:1284 [inline] ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423 ndisc_send_rs+0x2a6/0x610 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x52d/0x7d0 kernel/time/timer.c:2022 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 aa 1b 13 f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c2 96 e2 f6 65 8b 05 b3 cd 8a 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900034975c0 EFLAGS: 00000206 RAX: f3bfc66633caf000 RBX: 0000000000000a06 RCX: f3bfc66633caf000 RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001 RBP: ffffc90003497648 R08: ffffffff90da952f R09: 1ffffffff21b52a5 R10: dffffc0000000000 R11: fffffbfff21b52a6 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8880178409c0 R15: 1ffff92000692eb8 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __unfreeze_partials+0x190/0x210 mm/slub.c:2660 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x31d/0x410 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305 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+0x13e/0x260 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node+0xa4/0x230 mm/slab_common.c:1014 kmalloc_node include/linux/slab.h:620 [inline] __vmalloc_area_node mm/vmalloc.c:3144 [inline] __vmalloc_node_range+0x59a/0x1320 mm/vmalloc.c:3339 __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: 0033:0x7f7ed918f749 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:00007f7ed9f79038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7ed93e5fa0 RCX: 00007f7ed918f749 RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005 RBP: 00007f7ed9213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7ed93e6038 R14: 00007f7ed93e5fa0 R15: 00007fffb0168e28