syzbot

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WARNING: CPU: 1 PID: 4695 at net/mac80211/tx.c:4934 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4934 [inline]
WARNING: CPU: 1 PID: 4695 at net/mac80211/tx.c:4934 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5255
Modules linked in:
CPU: 1 PID: 4695 Comm: syz.0.66 Not tainted 6.1.142-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 b4 eb f7 0f 0b 48 8b 7c 24 20 e8 e4 94 7f fe e9 dd e9 ff ff e8 8a b4 eb f7 0f 0b e9 f1 ee ff ff e8 7e b4 eb f7 <0f> 0b e9 61 f2 ff ff e8 72 b4 eb f7 48 c7 c7 30 a1 d9 8d 4c 89 f6
RSP: 0018:ffffc900001e08a0 EFLAGS: 00010246
RAX: ffffffff89952302 RBX: 0000000000000000 RCX: ffff88805e575940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0aa8 R08: ffff88805e575940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff9200003c12c
R13: dffffc0000000000 R14: ffff888028d2e258 R15: ffff888075f5f400
FS:  00007f6dfd6226c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000196030 CR3: 000000002471e000 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: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: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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:244 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x80 kernel/kcov.c:313
Code: 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 03 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 48 8b 04 24 <65> 48 8b 15 54 94 81 7e 65 8b 0d 55 94 81 7e 81 e1 00 01 ff 00 74
RSP: 0018:ffffc90003f17a78 EFLAGS: 00000246
RAX: ffffffff881258d7 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88805e575940 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003f17c70 R08: 0000000000000000 R09: ffffc90003f17d30
R10: fffff520007e2fb0 R11: 1ffff920007e2fae R12: ffffc90003f17d20
R13: dffffc0000000000 R14: 0000000000000002 R15: 1ffff920007e2f58
 ___sys_recvmsg+0x187/0x510 net/socket.c:2777
 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: 0033:0x7f6dfc78e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6dfd622038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6dfc9b6080 RCX: 00007f6dfc78e929
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f6dfc810b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6dfc9b6080 R15: 00007ffebcbb0fd8
 </TASK>
----------------
Code disassembly (best guess):
   0:	77 22                	ja     0x24
   2:	89 ff                	mov    %edi,%edi
   4:	89 f6                	mov    %esi,%esi
   6:	49 ff c0             	inc    %r8
   9:	4c 89 01             	mov    %r8,(%rcx)
   c:	48 c7 44 11 08 03 00 	movq   $0x3,0x8(%rcx,%rdx,1)
  13:	00 00
  15:	48 89 7c 11 10       	mov    %rdi,0x10(%rcx,%rdx,1)
  1a:	48 89 74 11 18       	mov    %rsi,0x18(%rcx,%rdx,1)
  1f:	48 89 44 11 20       	mov    %rax,0x20(%rcx,%rdx,1)
  24:	c3                   	ret
  25:	90                   	nop
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 15 54 94 81 	mov    %gs:0x7e819454(%rip),%rdx        # 0x7e819486 <-- trapping instruction
  31:	7e
  32:	65 8b 0d 55 94 81 7e 	mov    %gs:0x7e819455(%rip),%ecx        # 0x7e81948e
  39:	81 e1 00 01 ff 00    	and    $0xff0100,%ecx
  3f:	74                   	.byte 0x74