------------[ cut here ]------------
WARNING: CPU: 1 PID: 7396 at net/mac80211/tx.c:5031 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
WARNING: CPU: 1 PID: 7396 at net/mac80211/tx.c:5031 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Modules linked in:
CPU: 1 PID: 7396 Comm: syz.3.387 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Code: 24 4c 89 e7 e8 8e b0 c0 f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 39 ef 82 f7 0f 0b e9 f6 f7 ff ff e8 2d ef 82 f7 <0f> 0b e9 48 fb ff ff e8 21 ef 82 f7 48 c7 c7 80 7c 64 8e 4c 89 e6
RSP: 0018:ffffc900001f0a18 EFLAGS: 00010246
RAX: ffffffff8a0432a3 RBX: ffffffff8a0420a6 RCX: ffff8880272eda00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8880272eda00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805bd823c0
R13: dffffc0000000000 R14: ffff88805bd828b0 R15: ffff88805c265424
FS:  00007fe99e5996c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5a11f05815 CR3: 000000002edcb000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5569
 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:trace_contention_begin+0x32/0xe0 include/trace/events/lock.h:95
Code: 8b 05 2e 32 9c 7e 83 f8 08 73 30 89 c3 c1 e8 06 48 8d 3c c5 28 0c 8b 8e be 08 00 00 00 e8 b6 d6 77 00 48 0f a3 1d 66 88 23 0d <73> 09 e8 e7 60 09 00 84 c0 74 0a 5b 41 5e 41 5f c3 0f 0b eb cc 0f
RSP: 0018:ffffc9000bf575a0 EFLAGS: 00000257
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816783ba
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e8b0c28
RBP: ffffc9000bf57710 R08: ffffffff8e8b0c2f R09: 1ffffffff1d16185
R10: dffffc0000000000 R11: fffffbfff1d16186 R12: 0000000000000000
R13: 1ffff920017eaec8 R14: 0000000000000000 R15: 0000000000000000
 __mutex_lock_common kernel/locking/mutex.c:605 [inline]
 __mutex_lock+0x147/0xcc0 kernel/locking/mutex.c:747
 __unix_dgram_recvmsg+0x1fc/0xd80 net/unix/af_unix.c:2407
 sock_recvmsg_nosec+0x82/0xd0 net/socket.c:1046
 ____sys_recvmsg+0x4e8/0x5e0 net/socket.c:2811
 ___sys_recvmsg+0x216/0x590 net/socket.c:2855
 do_recvmmsg+0x39a/0x870 net/socket.c:2949
 __sys_recvmmsg net/socket.c:3028 [inline]
 __do_sys_recvmmsg net/socket.c:3051 [inline]
 __se_sys_recvmmsg net/socket.c:3044 [inline]
 __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3044
 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: 0033:0x7fe99d79c819
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:00007fe99e599028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fe99da16090 RCX: 00007fe99d79c819
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007fe99d832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe99da16128 R14: 00007fe99da16090 R15: 00007ffdda5870d8
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 05 2e 32 9c 7e    	mov    0x7e9c322e(%rip),%eax        # 0x7e9c3234
   6:	83 f8 08             	cmp    $0x8,%eax
   9:	73 30                	jae    0x3b
   b:	89 c3                	mov    %eax,%ebx
   d:	c1 e8 06             	shr    $0x6,%eax
  10:	48 8d 3c c5 28 0c 8b 	lea    -0x7174f3d8(,%rax,8),%rdi
  17:	8e
  18:	be 08 00 00 00       	mov    $0x8,%esi
  1d:	e8 b6 d6 77 00       	call   0x77d6d8
  22:	48 0f a3 1d 66 88 23 	bt     %rbx,0xd238866(%rip)        # 0xd238890
  29:	0d
* 2a:	73 09                	jae    0x35 <-- trapping instruction
  2c:	e8 e7 60 09 00       	call   0x96118
  31:	84 c0                	test   %al,%al
  33:	74 0a                	je     0x3f
  35:	5b                   	pop    %rbx
  36:	41 5e                	pop    %r14
  38:	41 5f                	pop    %r15
  3a:	c3                   	ret
  3b:	0f 0b                	ud2
  3d:	eb cc                	jmp    0xb
  3f:	0f                   	.byte 0xf