------------[ cut here ]------------
WARNING: CPU: 0 PID: 7175 at net/mac80211/tx.c:5033 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
WARNING: CPU: 0 PID: 7175 at net/mac80211/tx.c:5033 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5444
Modules linked in:
CPU: 0 PID: 7175 Comm: syz.0.330 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5444
Code: f7 4c 89 ef e8 b0 a4 c2 f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 7b c6 84 f7 0f 0b e9 61 f8 ff ff e8 6f c6 84 f7 <0f> 0b e9 85 fb ff ff e8 63 c6 84 f7 48 c7 c7 40 50 64 8e 4c 89 e6
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff8a021ee1 RBX: dffffc0000000000 RCX: ffff888022b0bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888022b0bc00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805c8e2440
R13: ffff88802c005024 R14: ffff88805c8e2930 R15: ffff88802c005000
FS: 00007fb7dda096c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000004000 CR3: 000000003008e000 CR4: 00000000003506f0
Call Trace:
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5571
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__iterate_interfaces+0x225/0x4c0 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:1754 [inline]
__hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818
hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835
handle_softirqs+0x27d/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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 4b e4 ce f6 65 8b 05 1c 33 76 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9001a0a78a0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: befc3e7b2b3dd400
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: 0000000000000001
RBP: ffffc9001a0a7930 R08: ffffffff8e8ae5ef R09: 1ffffffff1d15cbd
R10: dffffc0000000000 R11: fffffbfff1d15cbe R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802c719030 R15: 1ffff92003414f14
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
snd_rawmidi_kernel_write1+0x33a/0x610 sound/core/rawmidi.c:1617
snd_rawmidi_write+0x5ac/0xb90 sound/core/rawmidi.c:1687
do_loop_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x4e5/0xc50 fs/read_write.c:862
vfs_writev fs/read_write.c:933 [inline]
do_writev+0x27f/0x480 fs/read_write.c:976
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb7dcb9ce59
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:00007fb7dda09028 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fb7dce15fa0 RCX: 00007fb7dcb9ce59
RDX: 0000000000000002 RSI: 0000200000000840 RDI: 0000000000000005
RBP: 00007fb7dcc32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7dce16038 R14: 00007fb7dce15fa0 R15: 00007ffdb5ac3808
----------------
Code disassembly (best guess):
0: c7 44 24 20 00 00 00 movl $0x0,0x20(%rsp)
7: 00
8: 9c pushf
9: 8f 44 24 20 pop 0x20(%rsp)
d: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp)
14: 00
15: 41 c6 04 07 f8 movb $0xf8,(%r15,%rax,1)
1a: 75 4b jne 0x67
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 4b e4 ce f6 call 0xf6cee47a <-- trapping instruction
2f: 65 8b 05 1c 33 76 75 mov %gs:0x7576331c(%rip),%eax # 0x75763352
36: 85 c0 test %eax,%eax
38: 74 3c je 0x76
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss