rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=261/1/0x4000000000000002 softirq=58773/58774 fqs=5246 (detected by 1, t=10502 jiffies, g=87577, q=1627) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 16329 Comm: syz.4.3377 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:perf_trace_preemptirq_template+0x2b5/0x380 include/trace/events/preemptirq.h:14 Code: 0f 85 c1 00 00 00 41 89 54 24 0c 8b 94 24 80 00 00 00 41 b8 01 00 00 00 4c 89 e7 be 14 00 00 00 48 8b 4c 24 28 4d 89 e9 6a 00 74 24 28 e8 f2 f8 18 00 48 83 c4 10 eb 0c e8 f7 e4 f9 ff eb 05 RSP: 0018:ffffc900000078f8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8c1674c0 RDX: 0000000000000001 RSI: 0000000000000014 RDI: ffffe8ffffa18000 RBP: ffffc900000079e8 R08: 0000000000000001 R09: ffff8880b90351c8 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffffe8ffffa18000 R13: ffff8880b90351c8 R14: ffffe8ffffa1800c R15: ffffffff8c1674c0 FS: 00007fc2775756c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007d1ea000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0100000000000000 DR2: 0000000000000000 DR3: 0000200000000500 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: 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+0x18/0x480 kernel/rcu/tree_plugin.h:625 Code: f7 e8 7c d6 57 00 4c 89 ef eb 84 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 49 bd 00 00 00 RSP: 0018:ffffc90000007ae0 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff88802249bfbc RCX: ffff88802249bb80 RDX: 0000000000000100 RSI: ffffffff8a59a860 RDI: ffff88802249bb80 RBP: ffffc90000007bb8 R08: dffffc0000000000 R09: fffffbfff1ad334e R10: fffffbfff1ad334e R11: 1ffffffff1ad334d R12: 1ffff110044937f7 R13: 0000000000019000 R14: ffff88802249bfc0 R15: dffffc0000000000 __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+0x53d/0xc40 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x328/0x820 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x12f/0x220 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:rol32 include/linux/bitops.h:109 [inline] RIP: 0010:jhash2 include/linux/jhash.h:129 [inline] RIP: 0010:hash_stack lib/stackdepot.c:180 [inline] RIP: 0010:stack_depot_save+0x76/0x440 lib/stackdepot.c:272 Code: 04 0f 82 83 00 00 00 89 e9 89 ee 49 89 f8 41 03 30 41 03 48 04 41 03 68 08 41 89 ea 41 c1 c2 04 29 ee 41 31 f2 01 cd 44 29 d1 <45> 89 d3 41 c1 c3 06 41 31 cb 41 01 ea 45 89 de 41 c1 c6 08 44 29 RSP: 0018:ffffc90002dbf6c0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000003e65b12 RDX: 0000000000002800 RSI: 00000000505df9fc RDI: ffffc90002dbf760 RBP: 00000000bd1ed4c9 R08: ffffc90002dbf76c R09: 000000000000001d R10: 00000000a99c5f4c R11: 000000006c73d3de R12: dffffc0000000000 R13: 1ffff920005b7ee8 R14: 00000000b3514a70 R15: 1ffff11004493820 save_stack+0x101/0x1e0 mm/page_owner.c:120 __reset_page_owner+0x51/0x180 mm/page_owner.c:140 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 free_slab mm/slub.c:2020 [inline] discard_slab mm/slub.c:2026 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2512 put_cpu_partial+0x12d/0x190 mm/slub.c:2592 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] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 sock_alloc_inode+0x17/0xb0 net/socket.c:303 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x5f/0x210 fs/inode.c:1001 sock_alloc net/socket.c:626 [inline] __sock_create+0x129/0x900 net/socket.c:1450 sock_create net/socket.c:1542 [inline] __sys_socketpair+0x232/0x540 net/socket.c:1646 __do_sys_socketpair net/socket.c:1695 [inline] __se_sys_socketpair net/socket.c:1692 [inline] __x64_sys_socketpair+0x97/0xb0 net/socket.c:1692 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: 0033:0x7fc27930dfc9 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:00007fc277575038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007fc279564fa0 RCX: 00007fc27930dfc9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001 RBP: 00007fc279390f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc279565038 R14: 00007fc279564fa0 R15: 00007ffe65ffc108