rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-....: (3 ticks this GP) idle=ecf/1/0x4000000000000000 softirq=14387/14388 fqs=5247 (detected by 0, t=10502 jiffies, g=18577, q=900) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6962 Comm: syz.0.679 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:216 Code: 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d c4 3a 89 7e 65 8b RSP: 0018:ffffc90000dd0a00 EFLAGS: 00000006 RAX: ffffffff81851f22 RBX: 0000000000000001 RCX: ffff88807ead9dc0 RDX: 0000000000010100 RSI: 0000000000000001 RDI: 0000000000000008 RBP: 0000000000000001 R08: ffff8880b913b1fb R09: 1ffff1101722763f R10: dffffc0000000000 R11: ffffed1017227640 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007fe6706406c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe6724344c0 CR3: 0000000073fc4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: irq_work_run+0x82/0xe0 kernel/irq_work.c:187 __sysvec_irq_work+0x98/0x240 arch/x86/kernel/irq_work.c:22 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x4a/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674 Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 32 e1 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc90000dd0b00 EFLAGS: 00000206 RAX: 330f47d492373600 RBX: 1ffff920001ba164 RCX: 330f47d492373600 RDX: dffffc0000000000 RSI: ffffffff8a2b2800 RDI: ffffffff8a79fe00 RBP: ffffc90000dd0bd8 R08: ffff8880b913b30b R09: 1ffff11017227661 R10: dffffc0000000000 R11: ffffed1017227662 R12: ffffffff8c323000 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] ieee80211_iterate_active_interfaces_atomic+0x132/0x140 net/mac80211/util.c:831 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4f2/0xb70 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x339/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:put_cpu_partial+0x15e/0x190 mm/slub.c:2591 Code: 00 00 48 3b 44 24 08 75 4d 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 2f e4 fe 07 41 f7 c5 00 02 00 00 74 c3 fb 4d 85 ff <75> c2 eb cb 48 c7 c7 b0 22 3f 8c 4c 89 e6 e8 8f 36 46 02 e9 e5 fe RSP: 0018:ffffc900041aeec8 EFLAGS: 00000246 RAX: 330f47d492373600 RBX: ffff888016c42140 RCX: 330f47d492373600 RDX: dffffc0000000000 RSI: ffffffff8a2b2800 RDI: ffffffff8a79fe00 RBP: 0000000000000001 R08: ffff8880b913b30b R09: 1ffff11017227661 R10: dffffc0000000000 R11: ffffed1017227662 R12: 0000000000000001 R13: 0000000000000282 R14: ffff8880b913e000 R15: 0000000000000000 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] __kmalloc_node+0x15a/0x3b0 mm/slub.c:4456 kmalloc_node include/linux/slab.h:630 [inline] __vmalloc_area_node mm/vmalloc.c:2918 [inline] __vmalloc_node_range+0x2dd/0x8b0 mm/vmalloc.c:3037 __vmalloc_node mm/vmalloc.c:3087 [inline] vmalloc+0x75/0x80 mm/vmalloc.c:3120 bpf_prog_calc_tag+0xe1/0x710 kernel/bpf/core.c:281 resolve_pseudo_ldimm64+0xdd/0x1040 kernel/bpf/verifier.c:11841 bpf_check+0x4e00/0xf270 kernel/bpf/verifier.c:14131 bpf_prog_load+0xfec/0x1510 kernel/bpf/syscall.c:2354 __sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe6723e6dd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe670640028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe67265ffa0 RCX: 00007fe6723e6dd9 RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007fe67247cd69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe672660038 R14: 00007fe67265ffa0 R15: 00007ffeb46833a8