------------[ cut here ]------------
WARNING: CPU: 1 PID: 11506 at net/mac80211/tx.c:5033 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
WARNING: CPU: 1 PID: 11506 at net/mac80211/tx.c:5033 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5444
Modules linked in:
CPU: 1 PID: 11506 Comm: syz.9.868 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5444
Code: 24 4c 89 e7 e8 fe 74 c0 f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 f9 b2 82 f7 0f 0b e9 f6 f7 ff ff e8 ed b2 82 f7 <0f> 0b e9 48 fb ff ff e8 e1 b2 82 f7 48 c7 c7 20 89 64 8e 4c 89 e6
RSP: 0018:ffffc900001f0a18 EFLAGS: 00010246
RAX: ffffffff8a046f13 RBX: ffffffff8a045d16 RCX: ffff888026ef1e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888026ef1e00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805bffa3c0
R13: dffffc0000000000 R14: ffff88805bffa8b0 R15: ffff888021fb0024
FS:  00007f0597cf86c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb286d8cf10 CR3: 000000002ce13000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5571
 ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
 mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1750 [inline]
 __hrtimer_run_queues+0x520/0xc40 kernel/time/hrtimer.c:1814
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:do_select+0x1204/0x1920 fs/select.c:-1
Code: 89 df 44 89 ee e8 cc 3e 93 ff 49 83 fe 3e 77 4e 44 39 eb 7d 49 4d 89 ef 4c 8b 6c 24 38 4d 01 ed e8 31 3d 93 ff 48 ff 44 24 10 <48> 8b 5c 24 28 e9 cf fc ff ff e8 1d 3d 93 ff 41 bd 45 01 00 00 e9
RSP: 0018:ffffc900037c7660 EFLAGS: 00000202
RAX: ffffffff81f3e4cf RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffffc9000db4e000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900037c7b90 R08: ffff88802bbf405f R09: 1ffff1100577e80b
R10: dffffc0000000000 R11: ffffed100577e80c R12: 0000000000000000
R13: 0000000000000100 R14: 0000000000000007 R15: 000000000000000a
 core_sys_select+0x8c9/0xaa0 fs/select.c:678
 do_pselect fs/select.c:760 [inline]
 __do_sys_pselect6 fs/select.c:801 [inline]
 __se_sys_pselect6+0x272/0x340 fs/select.c:792
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0596d9cdd9
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:00007f0597cf8028 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: ffffffffffffffda RBX: 00007f0597016090 RCX: 00007f0596d9cdd9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000040
RBP: 00007f0596e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0597016128 R14: 00007f0597016090 R15: 00007fffadd29808
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 df                	mov    %ebx,%edi
   2:	44 89 ee             	mov    %r13d,%esi
   5:	e8 cc 3e 93 ff       	call   0xff933ed6
   a:	49 83 fe 3e          	cmp    $0x3e,%r14
   e:	77 4e                	ja     0x5e
  10:	44 39 eb             	cmp    %r13d,%ebx
  13:	7d 49                	jge    0x5e
  15:	4d 89 ef             	mov    %r13,%r15
  18:	4c 8b 6c 24 38       	mov    0x38(%rsp),%r13
  1d:	4d 01 ed             	add    %r13,%r13
  20:	e8 31 3d 93 ff       	call   0xff933d56
  25:	48 ff 44 24 10       	incq   0x10(%rsp)
* 2a:	48 8b 5c 24 28       	mov    0x28(%rsp),%rbx <-- trapping instruction
  2f:	e9 cf fc ff ff       	jmp    0xfffffd03
  34:	e8 1d 3d 93 ff       	call   0xff933d56
  39:	41 bd 45 01 00 00    	mov    $0x145,%r13d
  3f:	e9                   	.byte 0xe9