------------[ cut here ]------------
WARNING: CPU: 1 PID: 4495 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 1 PID: 4495 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Modules linked in:
CPU: 1 PID: 4495 Comm: syz.4.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
RIP: 0010:__ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Code: f8 0f 0b e9 f1 fa ff ff e8 f1 c2 41 f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 e0 c2 41 f8 0f 0b e9 3c ef ff ff e8 d4 c2 41 f8 <0f> 0b e9 b8 f2 ff ff e8 f8 dd 6b 00 44 89 e1 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff8936093c RBX: ffff88805b4b0c80 RCX: ffff8880257b5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0ae8 R08: ffff8880257b5940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88807999bc00
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS: 00007f94c067b6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000225030 CR3: 000000006f75f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5202
ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__unix_dgram_recvmsg+0x94/0xd50 net/unix/af_unix.c:2296
Code: b4 24 80 00 00 00 49 c1 ee 03 43 c7 04 26 f1 f1 f1 f1 48 b8 f2 f2 f2 f2 00 f2 f2 f2 4b 89 44 26 08 43 c7 44 26 11 f2 f2 f2 04 <66> 43 c7 44 26 15 f2 04 43 c6 44 26 17 f3 e8 e9 c6 f6 f8 49 8d 9f
RSP: 0018:ffffc90003c5f760 EFLAGS: 00000a06
RAX: f2f2f200f2f2f2f2 RBX: ffffc90003c5fd40 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffc90003c5fd40 RDI: ffff888024e3e800
RBP: ffffc90003c5f8f0 R08: dffffc0000000000 R09: ffffc90003c5f9a0
R10: fffff5200078bf44 R11: 1ffff9200078bf34 R12: dffffc0000000000
R13: 0000000000000002 R14: 1ffff9200078befc R15: ffff888024e3e800
____sys_recvmsg+0x291/0x580 net/socket.c:-1
___sys_recvmsg+0x1af/0x4f0 net/socket.c:2707
do_recvmmsg+0x344/0x7a0 net/socket.c:2801
__sys_recvmmsg net/socket.c:2880 [inline]
__do_sys_recvmmsg net/socket.c:2903 [inline]
__se_sys_recvmmsg net/socket.c:2896 [inline]
__x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2896
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f94c102d749
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:00007f94c067b038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f94c1284090 RCX: 00007f94c102d749
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f94c10b1f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94c1284128 R14: 00007f94c1284090 R15: 00007ffdaeac8b28
----------------
Code disassembly (best guess):
0: b4 24 mov $0x24,%ah
2: 80 00 00 addb $0x0,(%rax)
5: 00 49 c1 add %cl,-0x3f(%rcx)
8: ee out %al,(%dx)
9: 03 43 c7 add -0x39(%rbx),%eax
c: 04 26 add $0x26,%al
e: f1 int1
f: f1 int1
10: f1 int1
11: f1 int1
12: 48 b8 f2 f2 f2 f2 00 movabs $0xf2f2f200f2f2f2f2,%rax
19: f2 f2 f2
1c: 4b 89 44 26 08 mov %rax,0x8(%r14,%r12,1)
21: 43 c7 44 26 11 f2 f2 movl $0x4f2f2f2,0x11(%r14,%r12,1)
28: f2 04
* 2a: 66 43 c7 44 26 15 f2 movw $0x4f2,0x15(%r14,%r12,1) <-- trapping instruction
31: 04
32: 43 c6 44 26 17 f3 movb $0xf3,0x17(%r14,%r12,1)
38: e8 e9 c6 f6 f8 call 0xf8f6c726
3d: 49 rex.WB
3e: 8d .byte 0x8d
3f: 9f lahf