------------[ cut here ]------------ WARNING: CPU: 1 PID: 0 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] WARNING: CPU: 1 PID: 0 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345 Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345 Code: 24 4c 89 e7 e8 4e e2 22 f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 b9 c6 ea f7 0f 0b e9 f6 f7 ff ff e8 ad c6 ea f7 <0f> 0b e9 48 fb ff ff e8 a1 c6 ea f7 48 c7 c7 90 25 da 8d 4c 89 e6 RSP: 0018:ffffc900001e0a10 EFLAGS: 00010246 RAX: ffffffff89964313 RBX: ffffffff89963116 RCX: ffff88813fef1dc0 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88813fef1dc0 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880764aa258 R13: dffffc0000000000 R14: ffff8880764aa790 R15: ffff888023cc2c24 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f514ec25f98 CR3: 00000000481d1000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5472 ieee80211_beacon_get include/net/mac80211.h:5335 [inline] mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1747 [inline] __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1811 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:742 Code: 48 89 df e8 17 1e b6 f7 e9 4c ff ff ff e8 9d 0e f6 ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 66 90 0f 00 2d c7 80 4b 00 fb f4 0f 1f 40 00 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48 RSP: 0018:ffffc90000177de8 EFLAGS: 000002c6 RAX: 0761d1592fb5d500 RBX: ffffffff8a1b2267 RCX: 0761d1592fb5d500 RDX: 0000000000000001 RSI: ffffffff8a6c0600 RDI: ffffffff8abefec0 RBP: ffffc90000177f20 R08: dffffc0000000000 R09: ffffed10171e6b02 R10: ffffed10171e6b02 R11: 1ffff110171e6b01 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff88813fef1dc0 R15: 1ffffffff1bfe4ce default_idle_call+0x84/0xc0 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x1fc/0x570 kernel/sched/idle.c:303 cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401 start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281 secondary_startup_64_no_verify+0xcf/0xdb ---------------- Code disassembly (best guess): 0: 48 89 df mov %rbx,%rdi 3: e8 17 1e b6 f7 call 0xf7b61e1f 8: e9 4c ff ff ff jmp 0xffffff59 d: e8 9d 0e f6 ff call 0xfff60eaf 12: 00 00 add %al,(%rax) 14: cc int3 15: cc int3 16: 00 00 add %al,(%rax) 18: cc int3 19: cc int3 1a: 00 00 add %al,(%rax) 1c: cc int3 1d: cc int3 1e: 00 66 90 add %ah,-0x70(%rsi) 21: 0f 00 2d c7 80 4b 00 verw 0x4b80c7(%rip) # 0x4b80ef 28: fb sti 29: f4 hlt * 2a: c3 ret <-- trapping instruction 2b: 0f 1f 40 00 nopl 0x0(%rax) 2f: 41 57 push %r15 31: 41 56 push %r14 33: 53 push %rbx 34: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 3b: fc ff df 3e: 65 gs 3f: 48 rex.W