------------[ cut here ]------------ WARNING: CPU: 1 PID: 8023 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline] WARNING: CPU: 1 PID: 8023 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083 Modules linked in: CPU: 1 PID: 8023 Comm: syz.0.755 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline] RIP: 0010:__ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083 Code: f8 0f 0b e9 f1 fa ff ff e8 51 b6 3a f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 40 b6 3a f8 0f 0b e9 3c ef ff ff e8 34 b6 3a f8 <0f> 0b e9 b8 f2 ff ff e8 48 d9 6b 00 44 89 e1 80 e1 07 80 c1 03 38 RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246 RAX: ffffffff893d147c RBX: ffff88805ee94c80 RCX: ffff88802a7f9dc0 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000dd0ae8 R08: ffff88802a7f9dc0 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880622f1e00 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128 FS: 00005555830c9500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3bcd55c5c0 CR3: 000000007a670000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5202 ieee80211_beacon_get include/net/mac80211.h:4983 [inline] mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865 __run_hrtimer kernel/time/hrtimer.c:1690 [inline] __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194 Code: 74 05 e8 6e 8d cb f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 26 16 9f f7 65 8b 05 27 14 50 76 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900036efb20 EFLAGS: 00000206 RAX: 6995085cbc089400 RBX: 0000000000000a02 RCX: 6995085cbc089400 RDX: dffffc0000000000 RSI: ffffffff8a0b1620 RDI: 0000000000000001 RBP: ffffc900036efbb0 R08: dffffc0000000000 R09: fffffbfff2c5eb20 R10: fffffbfff2c5eb20 R11: 1ffffffff2c5eb1f R12: dffffc0000000000 R13: ffff8880618dd6d8 R14: ffffffff962f58f8 R15: 1ffff920006ddf64 __debug_object_init+0x217/0xa40 lib/debugobjects.c:633 hrtimer_init_sleeper_on_stack kernel/time/hrtimer.c:435 [inline] hrtimer_nanosleep+0x144/0x520 kernel/time/hrtimer.c:2100 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1314 [inline] __se_sys_clock_nanosleep+0x2e6/0x370 kernel/time/posix-timers.c:1291 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: 0033:0x7fa691d764a5 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8 RSP: 002b:00007fffa1eed0e0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 00007fa691f6afa0 RCX: 00007fa691d764a5 RDX: 00007fffa1eed120 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fa691f6cda0 R08: 0000000000000000 R09: 003509f8384dbbc0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000031eb3 R13: 00007fa691f6b090 R14: ffffffffffffffff R15: 00007fffa1eed260 ---------------- Code disassembly (best guess): 0: 74 05 je 0x7 2: e8 6e 8d cb f7 call 0xf7cb8d75 7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp) e: 00 00 10: 9c pushf 11: 8f 44 24 20 pop 0x20(%rsp) 15: f6 44 24 21 02 testb $0x2,0x21(%rsp) 1a: 75 4b jne 0x67 1c: f7 c3 00 02 00 00 test $0x200,%ebx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 26 16 9f f7 call 0xf79f1655 <-- trapping instruction 2f: 65 8b 05 27 14 50 76 mov %gs:0x76501427(%rip),%eax # 0x7650145d 36: 85 c0 test %eax,%eax 38: 74 3c je 0x76 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss