rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=c55/1/0x4000000000000002 softirq=5560/5561 fqs=5247 (detected by 1, t=10502 jiffies, g=5401, q=1109) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3647 Comm: syz.2.3 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:check_preemption_disabled+0x2/0x110 lib/smp_processor_id.c:13 Code: 48 c7 c7 c0 fc 92 8a e8 2c 01 00 00 65 ff 0d 01 f3 ce 75 5b c3 cc cc cc 48 c7 c7 60 04 d9 8a 48 c7 c6 a0 04 d9 8a eb 00 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 RSP: 0018:ffffc90000007698 EFLAGS: 00000006 RAX: ffffffff818cbb79 RBX: 0000000000000000 RCX: ffff88801e715940 RDX: 0000000000010100 RSI: ffffffff8ad904a0 RDI: ffffffff8ad90460 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1bd2c16 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f0a6f9fa6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32f12ff8 CR3: 00000000619c5000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irq_work_run+0xe/0xe0 kernel/irq_work.c:186 __sysvec_irq_work+0x9a/0x250 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x3b/0xb0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:664 RIP: 0010:rcu_read_unlock_special+0x84/0x520 kernel/rcu/tree_plugin.h:671 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 9d a2 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a RSP: 0018:ffffc900000077a0 EFLAGS: 00000206 RAX: 16bccc6c2bab6500 RBX: 1ffff92000000efc RCX: ffffffff81631ae8 RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: ffffffff8ad904c0 RBP: ffffc90000007878 R08: dffffc0000000000 R09: fffffbfff20e2437 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8c923c00 R13: ffff88801e715d98 R14: ffffc900000077e0 R15: 1ffff92000000ef8 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:771 [inline] ndisc_send_skb+0xc9c/0x13c0 net/ipv6/ndisc.c:519 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1767 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558 __do_softirq kernel/softirq.c:592 [inline] invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:stack_trace_consume_entry+0x2b/0x270 kernel/stacktrace.c:86 Code: 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 fb 48 ba 00 00 00 00 00 fc ff df 4c 8d 4f 10 4d 89 cf 49 c1 ef 03 41 0f b6 04 17 <84> c0 0f 85 02 01 00 00 44 8b 43 10 48 8d 6b 08 49 89 ec 49 c1 ec RSP: 0018:ffffc9000115ef50 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffffc9000115f080 RCX: 0000000080000000 RDX: dffffc0000000000 RSI: ffffffff81c98661 RDI: ffffc9000115f080 RBP: ffffc9000115f030 R08: ffffc9000115f3f8 R09: ffffc9000115f090 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801e715940 R13: ffffffff816df9a0 R14: ffffc9000115f080 R15: 1ffff9200022be12 arch_stack_walk+0x101/0x140 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0xf1/0x270 mm/slub.c:4559 do_check_common+0x877/0x1070 kernel/bpf/verifier.c:13488 do_check_main kernel/bpf/verifier.c:13545 [inline] bpf_check+0xcb80/0x12d00 kernel/bpf/verifier.c:14116 bpf_prog_load+0x12b3/0x1b60 kernel/bpf/syscall.c:2353 __sys_bpf+0x343/0x670 kernel/bpf/syscall.c:4651 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline] __se_sys_bpf kernel/bpf/syscall.c:4753 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f0a71581ff9 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:00007f0a6f9fa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0a71739f80 RCX: 00007f0a71581ff9 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007f0a715f4296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0a71739f80 R15: 00007ffc4305ed88