------------[ cut here ]------------
WARNING: CPU: 1 PID: 16477 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 1 PID: 16477 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Modules linked in:
CPU: 1 PID: 16477 Comm: kworker/u4:21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound nsim_dev_trap_report_work
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 8e 2e 0a f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 a9 8f d1 f7 0f 0b e9 f6 f7 ff ff e8 9d 8f d1 f7 <0f> 0b e9 48 fb ff ff e8 91 8f d1 f7 48 c7 c7 90 dc fa 8d 4c 89 e6
RSP: 0018:ffffc900001e0a30 EFLAGS: 00010246
RAX: ffffffff89b0e4f3 RBX: ffffffff89b0d2f6 RCX: ffff888077f59dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888077f59dc0 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880563d2228
R13: dffffc0000000000 R14: ffff8880563d2760 R15: ffff8880574a5c24
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f270b944000 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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+0x54a/0xd50 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:crng_make_state+0x618/0xb00 drivers/char/random.c:354
Code: 41 b2 05 e9 e1 fc ff ff e8 25 d9 fc fc e8 b0 29 a8 05 4d 85 f6 0f 84 39 ff ff ff e8 12 d9 fc fc fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 4b c7 44 3c 08 00 00 00 00 4b c7 44 3c 10
RSP: 0018:ffffc900063f7840 EFLAGS: 00000293
RAX: ffffffff84859b7e RBX: 0000000000000000 RCX: ffff888077f59dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900063f79f0 R08: ffffffff90af732f R09: 1ffffffff215ee65
R10: dffffc0000000000 R11: fffffbfff215ee66 R12: 1ffff92000c7ef10
R13: ffff8880b8f379d0 R14: 0000000000000200 R15: dffffc0000000000
 _get_random_bytes+0xfc/0x250 drivers/char/random.c:366
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:776 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
 nsim_dev_trap_report_work+0x650/0xaf0 drivers/net/netdevsim/dev.c:851
 process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	41 b2 05             	mov    $0x5,%r10b
   3:	e9 e1 fc ff ff       	jmp    0xfffffce9
   8:	e8 25 d9 fc fc       	call   0xfcfcd932
   d:	e8 b0 29 a8 05       	call   0x5a829c2
  12:	4d 85 f6             	test   %r14,%r14
  15:	0f 84 39 ff ff ff    	je     0xffffff54
  1b:	e8 12 d9 fc fc       	call   0xfcfcd932
  20:	fb                   	sti
  21:	48 c7 44 24 40 0e 36 	movq   $0x45e0360e,0x40(%rsp)
  28:	e0 45
* 2a:	4b c7 04 3c 00 00 00 	movq   $0x0,(%r12,%r15,1) <-- trapping instruction
  31:	00
  32:	4b c7 44 3c 08 00 00 	movq   $0x0,0x8(%r12,%r15,1)
  39:	00 00
  3b:	4b                   	rex.WXB
  3c:	c7                   	.byte 0xc7
  3d:	44 3c 10             	rex.R cmp $0x10,%al