------------[ cut here ]------------ WARNING: CPU: 0 PID: 6482 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] WARNING: CPU: 0 PID: 6482 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345 Modules linked in: CPU: 0 PID: 6482 Comm: syz.4.539 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 ae 73 0b f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 c9 dc d2 f7 0f 0b e9 f6 f7 ff ff e8 bd dc d2 f7 <0f> 0b e9 48 fb ff ff e8 b1 dc d2 f7 48 c7 c7 70 c2 fa 8d 4c 89 e6 RSP: 0018:ffffc90000007a10 EFLAGS: 00010246 RAX: ffffffff89af95b3 RBX: ffffffff89af83b6 RCX: ffff88802dcc3b80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802dcc3b80 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff88807d542258 R13: dffffc0000000000 R14: ffff88807d542790 R15: ffff888018e6e024 FS: 00007fa896bd56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558fff14e8 CR3: 00000000594b1000 CR4: 00000000003526f0 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+0x560/0xd70 kernel/time/hrtimer.c:1811 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 1f 7e 22 f7 65 8b 05 e0 01 cc 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc90004ed75a0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 6cb223cde6558000 RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: 0000000000000001 RBP: ffffc90004ed7630 R08: ffffffff90af32ef R09: 1ffffffff215e65d R10: dffffc0000000000 R11: fffffbfff215e65e R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88807249a6c0 R15: 1ffff920009daeb4 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x128/0x190 kernel/sched/wait.c:208 __unix_dgram_recvmsg+0x4c3/0xdc0 net/unix/af_unix.c:2478 ____sys_recvmsg+0x2cb/0x5e0 net/socket.c:-1 ___sys_recvmsg+0x212/0x590 net/socket.c:2779 do_recvmmsg+0x393/0x870 net/socket.c:2873 __sys_recvmmsg net/socket.c:2952 [inline] __do_sys_recvmmsg net/socket.c:2975 [inline] __se_sys_recvmmsg net/socket.c:2968 [inline] __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2968 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fa89899aeb9 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:00007fa896bd5028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fa898c16090 RCX: 00007fa89899aeb9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007fa898a08c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa898c16128 R14: 00007fa898c16090 R15: 00007ffdd03158f8 ---------------- Code disassembly (best guess): 0: c7 44 24 20 00 00 00 movl $0x0,0x20(%rsp) 7: 00 8: 9c pushf 9: 8f 44 24 20 pop 0x20(%rsp) d: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp) 14: 00 15: 41 c6 04 07 f8 movb $0xf8,(%r15,%rax,1) 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 1f 7e 22 f7 call 0xf7227e4e <-- trapping instruction 2f: 65 8b 05 e0 01 cc 75 mov %gs:0x75cc01e0(%rip),%eax # 0x75cc0216 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