------------[ cut here ]------------
WARNING: CPU: 0 PID: 5995 at net/mac80211/tx.c:5033 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
WARNING: CPU: 0 PID: 5995 at net/mac80211/tx.c:5033 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5444
Modules linked in:
CPU: 0 PID: 5995 Comm: syz.0.43 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5444
Code: f7 4c 89 ef e8 b0 a4 c2 f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 7b c6 84 f7 0f 0b e9 61 f8 ff ff e8 6f c6 84 f7 <0f> 0b e9 85 fb ff ff e8 63 c6 84 f7 48 c7 c7 40 50 64 8e 4c 89 e6
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff8a021ee1 RBX: dffffc0000000000 RCX: ffff888025d48000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888025d48000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805cd4e440
R13: ffff888029c98824 R14: ffff88805cd4e930 R15: ffff888029c98800
FS:  00007fb67860e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6785ecff8 CR3: 0000000077a41000 CR4: 00000000003506f0
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+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
 __iterate_interfaces+0x225/0x4c0 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:1754 [inline]
 __hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835
 handle_softirqs+0x27d/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:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:244 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x80 kernel/kcov.c:320
Code: 08 05 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d a0 ce 7c 7e 65 8b 15 a1 ce 7c 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90004eff028 EFLAGS: 00000246
RAX: ffffffff81c0ceef RBX: 0000000000000000 RCX: ffff888025d48000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000010 R08: ffffffff8e8ae5ef R09: 1ffffffff1d15cbd
R10: dffffc0000000000 R11: fffffbfff1d15cbe R12: 0000000000000000
R13: dffffc0000000000 R14: ffffea0001d1ba48 R15: 1ffffd40003a3749
 PageTail include/linux/page-flags.h:285 [inline]
 folio_flags include/linux/page-flags.h:312 [inline]
 folio_test_head include/linux/page-flags.h:798 [inline]
 folio_test_large include/linux/page-flags.h:819 [inline]
 folio_nr_pages include/linux/mm.h:2056 [inline]
 shmem_get_folio_gfp+0x114f/0x2b40 mm/shmem.c:2078
 shmem_get_folio mm/shmem.c:2164 [inline]
 shmem_write_begin+0xf2/0x430 mm/shmem.c:2706
 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4036
 shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2883
 __kernel_write_iter+0x29f/0x6d0 fs/read_write.c:517
 dump_emit_page fs/coredump.c:957 [inline]
 dump_user_range+0x418/0x840 fs/coredump.c:984
 elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
 do_coredump+0x1791/0x24a0 fs/coredump.c:833
 get_signal+0x10da/0x1390 kernel/signal.c:2889
 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fb67779ce61
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fb677a16180 RCX: 00007fb67779ce59
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fb677832e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fb677a16218 R14: 00007fb677a16180 R15: 00007fff66879d78
 </TASK>
----------------
Code disassembly (best guess):
   0:	08 05 00 00 00 48    	or     %al,0x48000000(%rip)        # 0x48000006
   6:	89 7c 11 10          	mov    %edi,0x10(%rcx,%rdx,1)
   a:	48 89 74 11 18       	mov    %rsi,0x18(%rcx,%rdx,1)
   f:	48 89 44 11 20       	mov    %rax,0x20(%rcx,%rdx,1)
  14:	c3                   	ret
  15:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1c:	00 00 00
  1f:	0f 1f 00             	nopl   (%rax)
  22:	f3 0f 1e fa          	endbr64
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 0d a0 ce 7c 	mov    %gs:0x7e7ccea0(%rip),%rcx        # 0x7e7cced2 <-- trapping instruction
  31:	7e
  32:	65 8b 15 a1 ce 7c 7e 	mov    %gs:0x7e7ccea1(%rip),%edx        # 0x7e7cceda
  39:	81 e2 00 01 ff 00    	and    $0xff0100,%edx
  3f:	74                   	.byte 0x74