rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-....: (1 GPs behind) idle=ba1/1/0x4000000000000000 softirq=16491/16492 fqs=5246 (detected by 0, t=10502 jiffies, g=22333, q=503) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7139 Comm: syz.0.867 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:rcu_read_unlock_special+0x106/0x4a0 kernel/rcu/tree_plugin.h:639 Code: c6 44 2b 08 f8 fa 41 f7 c4 00 02 00 00 74 0f e8 90 d2 19 00 66 45 85 f6 0f 84 d8 02 00 00 41 f7 c4 00 02 00 00 0f 94 44 24 08 55 b9 56 08 41 89 c6 83 f8 08 0f 83 ec 02 00 00 4e 8d 34 f5 20 RSP: 0018:ffffc90000dd06c0 EFLAGS: 00000046 RAX: f2f2f2f8f1f1f1f1 RBX: 1ffff920001ba0dc RCX: ffff888021588000 RDX: 0000000000000100 RSI: ffffffff8a79f7e0 RDI: ffff888021588000 RBP: ffffc90000dd07a0 R08: dffffc0000000000 R09: 1ffffffff203a618 R10: dffffc0000000000 R11: fffffbfff203a619 R12: 0000000000000046 R13: dffffc0000000000 R14: 0000000000000101 R15: ffff888021588000 FS: 00007fd0142016c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdbe154e00 CR3: 00000000256dd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] BPF_PROG_RUN_ARRAY include/linux/bpf.h:1444 [inline] trace_call_bpf+0x4f9/0x5b0 kernel/trace/bpf_trace.c:127 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10016 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 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 e2 f0 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: d400f2f2be93f100 RBX: 1ffff920001ba164 RCX: d400f2f2be93f100 RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f800 RBP: ffffc90000dd0bd8 R08: ffff8880b913b30b R09: 1ffff11017227661 R10: dffffc0000000000 R11: ffffed1017227662 R12: ffffffff8c322f00 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+0x4eb/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:__sanitizer_cov_trace_pc+0x55/0x60 kernel/kcov.c:214 Code: 2c 8b 91 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 c3 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d 14 4d 89 RSP: 0018:ffffc900032cf488 EFLAGS: 00000287 RAX: ffffffff8135fc35 RBX: 00000000236fe000 RCX: 0000000000080000 RDX: ffffc90005519000 RSI: 000000000001fbff RDI: 000000000001fc00 RBP: ffffc900032cf738 R08: ffff88802427d140 R09: 0000000080800067 R10: dffffc0000000000 R11: ffffed1017227662 R12: ffffea0000000000 R13: ffff8880236fe000 R14: 000000000000002e R15: ffff8880236fe000 phys_addr_valid arch/x86/mm/physaddr.h:7 [inline] __phys_addr+0x95/0x170 arch/x86/mm/physaddr.c:28 virt_to_head_page include/linux/mm.h:911 [inline] qlink_to_cache mm/kasan/quarantine.c:120 [inline] qlist_free_all+0x4d/0x90 mm/kasan/quarantine.c:173 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] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc_trace+0x103/0x2a0 mm/slub.c:3250 kmalloc include/linux/slab.h:607 [inline] kzalloc include/linux/slab.h:738 [inline] bpf_int_jit_compile+0x1e2/0xcd80 arch/x86/net/bpf_jit_comp.c:2388 bpf_prog_select_runtime+0x46f/0x7c0 kernel/bpf/core.c:1977 bpf_prog_load+0x1017/0x1510 kernel/bpf/syscall.c:2358 __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: 0033:0x7fd015fa7799 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:00007fd014201028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fd016220fa0 RCX: 00007fd015fa7799 RDX: 0000000000000075 RSI: 0000200000000780 RDI: 0000000000000005 RBP: 00007fd01603dbd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd016221038 R14: 00007fd016220fa0 R15: 00007fffb484c2b8