------------[ cut here ]------------ WARNING: CPU: 1 PID: 8807 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline] WARNING: CPU: 1 PID: 8807 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083 Modules linked in: CPU: 1 PID: 8807 Comm: syz.2.1102 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 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 81 83 3a f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 70 83 3a f8 0f 0b e9 3c ef ff ff e8 64 83 3a f8 <0f> 0b e9 b8 f2 ff ff e8 88 e7 6b 00 44 89 e1 80 e1 07 80 c1 03 38 RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246 RAX: ffffffff893d46ec RBX: ffff8880785c8c80 RCX: ffff88801ded8000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000dd0ae8 R08: ffff88801ded8000 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880631fbe00 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128 FS: 00007f707a6726c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000026000 CR3: 0000000074876000 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: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:finish_lock_switch+0x134/0x280 kernel/sched/core.c:4804 Code: be ff ff ff ff e8 7c bd 55 08 85 c0 74 4a 4d 85 ff 75 66 e9 fe 00 00 00 48 89 df e8 36 28 5f 08 e8 a1 74 2a 00 fb 48 83 c4 08 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 d9 0f fe ff 43 80 3c RSP: 0018:ffffc90004837368 EFLAGS: 00000282 RAX: 3ddf5cbae7893a00 RBX: ffff8880b903a340 RCX: 3ddf5cbae7893a00 RDX: dffffc0000000000 RSI: ffffffff8a0b1820 RDI: ffffffff8a59a4c0 RBP: 1ffff11017227613 R08: dffffc0000000000 R09: fffffbfff1ff7a2f R10: fffffbfff1ff7a2f R11: 1ffffffff1ff7a2e R12: ffff8880b913b088 R13: dffffc0000000000 R14: ffff8880b913ae08 R15: 0000000000000000 finish_task_switch+0x12f/0x640 kernel/sched/core.c:4921 context_switch kernel/sched/core.c:5052 [inline] __schedule+0x11c3/0x4390 kernel/sched/core.c:6395 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6799 irqentry_exit+0x63/0x70 kernel/entry/common.c:432 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681 RIP: 0010:skb_copy_datagram_iter+0xba/0x1f0 net/core/datagram.c:541 Code: a4 f9 4c 89 ff 89 ee 4c 89 f2 89 d9 45 31 c0 49 c7 c1 70 fd d2 87 6a 00 e8 13 f8 ff ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f <5d> c3 e8 0f ce a4 f9 0f 0b e9 7b ff ff ff e8 03 ce a4 f9 0f 0b eb RSP: 0018:ffffc90004837750 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000f033000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff87d2fd70 R10: fffffbfff1ad32b6 R11: 1ffffffff1ad32b5 R12: dffffc0000000000 R13: ffffc90004837d40 R14: 0000000000000000 R15: ffff888055a28500 skb_copy_datagram_msg include/linux/skbuff.h:3773 [inline] __unix_dgram_recvmsg+0x671/0xd50 net/unix/af_unix.c:2354 ____sys_recvmsg+0x291/0x580 net/socket.c:-1 ___sys_recvmsg+0x1af/0x4f0 net/socket.c:2697 do_recvmmsg+0x344/0x7a0 net/socket.c:2791 __sys_recvmmsg net/socket.c:2870 [inline] __do_sys_recvmmsg net/socket.c:2893 [inline] __se_sys_recvmmsg net/socket.c:2886 [inline] __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2886 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: 0033:0x7f707c42bfc9 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:00007f707a672038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f707c683090 RCX: 00007f707c42bfc9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f707c4aef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f707c683128 R14: 00007f707c683090 R15: 00007fff168f5058 ---------------- Code disassembly (best guess): 0: be ff ff ff ff mov $0xffffffff,%esi 5: e8 7c bd 55 08 call 0x855bd86 a: 85 c0 test %eax,%eax c: 74 4a je 0x58 e: 4d 85 ff test %r15,%r15 11: 75 66 jne 0x79 13: e9 fe 00 00 00 jmp 0x116 18: 48 89 df mov %rbx,%rdi 1b: e8 36 28 5f 08 call 0x85f2856 20: e8 a1 74 2a 00 call 0x2a74c6 25: fb sti 26: 48 83 c4 08 add $0x8,%rsp * 2a: 5b pop %rbx <-- trapping instruction 2b: 41 5c pop %r12 2d: 41 5d pop %r13 2f: 41 5e pop %r14 31: 41 5f pop %r15 33: 5d pop %rbp 34: c3 ret 35: 48 89 df mov %rbx,%rdi 38: e8 d9 0f fe ff call 0xfffe1016 3d: 43 rex.XB 3e: 80 .byte 0x80 3f: 3c .byte 0x3c