rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-....: (1 GPs behind) idle=dbb/1/0x4000000000000000 softirq=35959/35960 fqs=2096 (detected by 0, t=10503 jiffies, g=47221, q=46749) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13034 Comm: syz.0.1614 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 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 44 4e 89 7e 65 8b RSP: 0018:ffffc90000dd07d8 EFLAGS: 00000046 RAX: ffffffff818286ef RBX: ffff8880253bd928 RCX: ffff888027d43b80 RDX: 0000000000000100 RSI: 0000000000000267 RDI: ffffffff8a3042c0 RBP: ffffc90000dd08d8 R08: dffffc0000000000 R09: 1ffffffff203a818 R10: dffffc0000000000 R11: fffffbfff203a819 R12: ffff8880253bd918 R13: ffffc900011a8000 R14: 0000000000000001 R15: ffff888027d45388 FS: 00007f73444b26c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2e2722 CR3: 0000000078c3c000 CR4: 00000000003506e0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] BPF_PROG_RUN_ARRAY include/linux/bpf.h:1439 [inline] trace_call_bpf+0x27f/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 12 f2 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: a56e8f30b5e6ff00 RBX: 1ffff920001ba164 RCX: a56e8f30b5e6ff00 RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f980 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+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:__phys_addr+0x0/0x170 arch/x86/mm/physaddr.c:16 Code: 48 89 df e8 a2 25 00 00 4c 89 ff 31 f6 e8 e8 b4 7e 00 b8 01 00 00 00 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 00 00 cc cc <41> 57 41 56 53 48 89 fb e8 63 25 43 00 48 bf ff ff ff 7f ff ff ff RSP: 0018:ffffc9000368f990 EFLAGS: 00000286 RAX: dead000000000100 RBX: ffff888065d208c0 RCX: ffffea0000000000 RDX: 0000000000000001 RSI: ffffc9000368f9f8 RDI: ffff888065d208c0 RBP: 0000000000000000 R08: ffff88807c9ec000 R09: 0000000080040002 R10: dffffc0000000000 R11: ffffed1017227662 R12: ffffc9000368f9f8 R13: 0000000000000001 R14: ffffffff81be3b77 R15: ffff88801bbe5140 virt_to_head_page include/linux/mm.h:911 [inline] memcg_slab_free_hook+0x89/0x1f0 mm/slab.h:348 do_slab_free mm/slub.c:3437 [inline] ___cache_free+0x63/0x120 mm/slub.c:3511 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 getname_flags+0xb5/0x500 fs/namei.c:138 do_sys_openat2+0xdd/0x4b0 fs/open.c:1249 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 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: 0033:0x7f7346218fce Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007f73444b1ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f73444b26c0 RCX: 00007f7346218fce RDX: 0000000000000000 RSI: 00007f73444b1f90 RDI: ffffffffffffff9c RBP: 00007f73462eec99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f73464d2038 R14: 00007f73464d1fa0 R15: 00007fff0ffb2178