syzbot

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WARNING: CPU: 1 PID: 4495 at net/mac80211/tx.c:4934 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4934 [inline]
WARNING: CPU: 1 PID: 4495 at net/mac80211/tx.c:4934 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5255
Modules linked in:
CPU: 1 PID: 4495 Comm: syz-executor302 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4934 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5255
Code: ff ff ff e8 a0 f6 eb f7 0f 0b 48 8b 7c 24 20 e8 b4 ae 7f fe e9 dd e9 ff ff e8 8a f6 eb f7 0f 0b e9 f1 ee ff ff e8 7e f6 eb f7 <0f> 0b e9 61 f2 ff ff e8 72 f6 eb f7 48 c7 c7 f0 99 d9 8d 4c 89 f6
RSP: 0018:ffffc900001e08a0 EFLAGS: 00010246
RAX: ffffffff8994dff2 RBX: 0000000000000000 RCX: ffff8880728d8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0aa8 R08: ffff8880728d8000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff9200003c12c
R13: dffffc0000000000 R14: ffff88807cf12258 R15: ffff888076150600
FS:  00007fc7418436c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000029d030 CR3: 000000002379f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5342
 ieee80211_beacon_get include/net/mac80211.h:5262 [inline]
 mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2086
 __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:2142
 __run_hrtimer kernel/time/hrtimer.c:1752 [inline]
 __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1816
 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 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:check_kcov_mode kernel/kcov.c:193 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x32/0x80 kernel/kcov.c:313
Code: 64 95 81 7e 65 8b 0d 65 95 81 7e 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 1c 16 00 00 00 74 52 8b 8a f8 15 00 00 <83> f9 03 75 47 48 8b 8a 00 16 00 00 44 8b 8a fc 15 00 00 49 c1 e1
RSP: 0018:ffffc900040778d8 EFLAGS: 00000246
RAX: ffffffff881228d2 RBX: ffffc90004077d20 RCX: 0000000000000000
RDX: ffff8880728d8000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004077a70 R08: dffffc0000000000 R09: fffff5200080eed9
R10: fffff5200080eed9 R11: 1ffff9200080eed8 R12: ffffffff8b76b5b0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
 ____sys_recvmsg+0x2a2/0x580 net/socket.c:2740
 ___sys_recvmsg+0x1b2/0x510 net/socket.c:2780
 do_recvmmsg+0x359/0x7d0 net/socket.c:2874
 __sys_recvmmsg net/socket.c:2953 [inline]
 __do_sys_recvmmsg net/socket.c:2976 [inline]
 __se_sys_recvmmsg net/socket.c:2969 [inline]
 __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2969
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc7418a5829
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1a 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc741843218 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fc74192f438 RCX: 00007fc7418a5829
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007fc74192f430 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 00007fc7418fc38c
R13: 00002000000001c0 R14: 0000200000000200 R15: 0000200000000210
 </TASK>
----------------
Code disassembly (best guess):
   0:	64 95                	fs xchg %eax,%ebp
   2:	81 7e 65 8b 0d 65 95 	cmpl   $0x95650d8b,0x65(%rsi)
   9:	81 7e 81 e1 00 01 ff 	cmpl   $0xff0100e1,-0x7f(%rsi)
  10:	00 74 11 81          	add    %dh,-0x7f(%rcx,%rdx,1)
  14:	f9                   	stc
  15:	00 01                	add    %al,(%rcx)
  17:	00 00                	add    %al,(%rax)
  19:	75 5b                	jne    0x76
  1b:	83 ba 1c 16 00 00 00 	cmpl   $0x0,0x161c(%rdx)
  22:	74 52                	je     0x76
  24:	8b 8a f8 15 00 00    	mov    0x15f8(%rdx),%ecx
* 2a:	83 f9 03             	cmp    $0x3,%ecx <-- trapping instruction
  2d:	75 47                	jne    0x76
  2f:	48 8b 8a 00 16 00 00 	mov    0x1600(%rdx),%rcx
  36:	44 8b 8a fc 15 00 00 	mov    0x15fc(%rdx),%r9d
  3d:	49                   	rex.WB
  3e:	c1                   	.byte 0xc1
  3f:	e1                   	.byte 0xe1