syzbot

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WARNING: CPU: 1 PID: 4633 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 1 PID: 4633 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Modules linked in:
CPU: 1 PID: 4633 Comm: syz.3.53 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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 9e d3 0a f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 39 3d d2 f7 0f 0b e9 f6 f7 ff ff e8 2d 3d d2 f7 <0f> 0b e9 48 fb ff ff e8 21 3d d2 f7 48 c7 c7 50 d6 fa 8d 4c 89 e6
RSP: 0018:ffffc900001e0a30 EFLAGS: 00010246
RAX: ffffffff89b03583 RBX: ffffffff89b02386 RCX: ffff888024ce5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888024ce5940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88807d232228
R13: dffffc0000000000 R14: ffff88807d232760 R15: ffff888077482c24
FS:  00007f434d3776c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000264030 CR3: 0000000057150000 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:memory_is_nonzero mm/kasan/generic.c:101 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x5e/0x290 mm/kasan/generic.c:189
Code: bc 01 00 00 00 00 fc ff df 49 89 fe 49 c1 ee 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c 8d 44 3e ff 4d 89 c1 49 c1 e9 03 <4b> 8d 1c 21 49 89 df 4d 29 df 49 83 ff 10 7f 29 4d 85 ff 0f 84 38
RSP: 0018:ffffc90003a774f0 EFLAGS: 00000a07
RAX: 0000000000000001 RBX: ffffc90003a77560 RCX: ffffffff81639268
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff888023655530
RBP: ffffc90003a775d0 R08: ffff888023655537 R09: 1ffff110046caaa6
R10: dffffc0000000000 R11: ffffed10046caaa6 R12: dffffc0000000001
R13: 1ffff9200074eea8 R14: 1ffff110046caaa6 R15: ffff888024ce5940
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1779 [inline]
 __mutex_trylock_common+0x148/0x260 kernel/locking/mutex.c:129
 __mutex_trylock kernel/locking/mutex.c:152 [inline]
 __mutex_lock_common kernel/locking/mutex.c:606 [inline]
 __mutex_lock+0x148/0xaf0 kernel/locking/mutex.c:747
 __unix_dgram_recvmsg+0x205/0xdc0 net/unix/af_unix.c:2448
 ____sys_recvmsg+0x2cb/0x5e0 net/socket.c:-1
 ___sys_recvmsg+0x212/0x590 net/socket.c:2779
 do_recvmmsg+0x393/0x870 net/socket.c:2873
 __sys_recvmmsg net/socket.c:2952 [inline]
 __do_sys_recvmmsg net/socket.c:2975 [inline]
 __se_sys_recvmmsg net/socket.c:2968 [inline]
 __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2968
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f434c59c799
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:00007f434d377028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f434c816090 RCX: 00007f434c59c799
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f434c632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f434c816128 R14: 00007f434c816090 R15: 00007ffd1db15648
 </TASK>
----------------
Code disassembly (best guess):
   0:	bc 01 00 00 00       	mov    $0x1,%esp
   5:	00 fc                	add    %bh,%ah
   7:	ff                   	lcall  (bad)
   8:	df 49 89             	fisttps -0x77(%rcx)
   b:	fe 49 c1             	decb   -0x3f(%rcx)
   e:	ee                   	out    %al,(%dx)
   f:	03 49 ba             	add    -0x46(%rcx),%ecx
  12:	00 00                	add    %al,(%rax)
  14:	00 00                	add    %al,(%rax)
  16:	00 fc                	add    %bh,%ah
  18:	ff                   	lcall  (bad)
  19:	df 4f 8d             	fisttps -0x73(%rdi)
  1c:	1c 16                	sbb    $0x16,%al
  1e:	4c 8d 44 3e ff       	lea    -0x1(%rsi,%rdi,1),%r8
  23:	4d 89 c1             	mov    %r8,%r9
  26:	49 c1 e9 03          	shr    $0x3,%r9
* 2a:	4b 8d 1c 21          	lea    (%r9,%r12,1),%rbx <-- trapping instruction
  2e:	49 89 df             	mov    %rbx,%r15
  31:	4d 29 df             	sub    %r11,%r15
  34:	49 83 ff 10          	cmp    $0x10,%r15
  38:	7f 29                	jg     0x63
  3a:	4d 85 ff             	test   %r15,%r15
  3d:	0f                   	.byte 0xf
  3e:	84 38                	test   %bh,(%rax)