------------[ cut here ]------------
WARNING: CPU: 0 PID: 13661 at net/mac80211/tx.c:5031 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
WARNING: CPU: 0 PID: 13661 at net/mac80211/tx.c:5031 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Modules linked in:
CPU: 0 PID: 13661 Comm: syz.3.2342 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:5031 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Code: 24 4c 89 e7 e8 0e 25 db f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 59 f6 9d f7 0f 0b e9 f6 f7 ff ff e8 4d f6 9d f7 <0f> 0b e9 48 fb ff ff e8 41 f6 9d f7 48 c7 c7 e0 96 23 8e 4c 89 e6
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff89e79a73 RBX: ffffffff89e78876 RCX: ffff88807ecf3c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807ecf3c00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805ccb63c0
R13: dffffc0000000000 R14: ffff88805ccb68b0 R15: ffff88807d2c2024
FS: 00007f3e441786c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000007388c000 CR4: 00000000003506f0
Call Trace:
ieee80211_beacon_get_tim+0xb8/0x560 net/mac80211/tx.c:5569
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__iterate_interfaces+0x243/0x500 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:1750 [inline]
__hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 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:snd_rawmidi_write+0x398/0xb10 sound/core/rawmidi.c:1674
Code: 48 8d 7b 18 be 04 00 00 00 e8 44 ea af f9 b8 01 00 00 00 87 43 18 48 8b 7c 24 18 e8 f2 04 44 02 bf b8 0b 00 00 e8 68 e9 43 02 <49> 89 c5 48 8b 7c 24 48 48 8d b4 24 c0 00 00 00 e8 c3 48 37 f9 48
RSP: 0018:ffffc90004e4fa00 EFLAGS: 00000246
RAX: 0000000000000bb8 RBX: ffff88807ecf3c00 RCX: 0000000000080000
RDX: ffffc9000d12a000 RSI: 000000000007e5a9 RDI: 000000000007e5aa
RBP: ffffc90004e4fbb0 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: ffffffff882d161d
R13: ffff88805de11c30 R14: ffff8880251d3640 R15: dffffc0000000000
do_loop_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x50e/0xc70 fs/read_write.c:862
vfs_writev fs/read_write.c:933 [inline]
do_writev+0x252/0x410 fs/read_write.c:976
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3e4338f749
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:00007f3e44178038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f3e435e5fa0 RCX: 00007f3e4338f749
RDX: 0000000000000002 RSI: 0000200000000840 RDI: 0000000000000006
RBP: 00007f3e43413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3e435e6038 R14: 00007f3e435e5fa0 R15: 00007ffc82a75728
----------------
Code disassembly (best guess):
0: 48 8d 7b 18 lea 0x18(%rbx),%rdi
4: be 04 00 00 00 mov $0x4,%esi
9: e8 44 ea af f9 call 0xf9afea52
e: b8 01 00 00 00 mov $0x1,%eax
13: 87 43 18 xchg %eax,0x18(%rbx)
16: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi
1b: e8 f2 04 44 02 call 0x2440512
20: bf b8 0b 00 00 mov $0xbb8,%edi
25: e8 68 e9 43 02 call 0x243e992
* 2a: 49 89 c5 mov %rax,%r13 <-- trapping instruction
2d: 48 8b 7c 24 48 mov 0x48(%rsp),%rdi
32: 48 8d b4 24 c0 00 00 lea 0xc0(%rsp),%rsi
39: 00
3a: e8 c3 48 37 f9 call 0xf9374902
3f: 48 rex.W