vkms_vblank_simulate: vblank timer overrun
------------[ cut here ]------------
WARNING: CPU: 0 PID: 11045 at net/mac80211/tx.c:4883 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4883 [inline]
WARNING: CPU: 0 PID: 11045 at net/mac80211/tx.c:4883 __ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5107
Modules linked in:
CPU: 0 PID: 11045 Comm: syz.2.1646 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4883 [inline]
RIP: 0010:__ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5107
Code: 1d f8 0f 0b 4f 89 64 2f 04 4f 89 64 2f 0c 43 c6 44 2f 14 f8 e9 19 fe ff ff e8 12 8f 1d f8 0f 0b e9 16 ef ff ff e8 06 8f 1d f8 <0f> 0b e9 7c f2 ff ff e8 ba ec 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900000078c0 EFLAGS: 00010246
RAX: ffffffff895b9e8a RBX: ffff88807739c200 RCX: ffff88802ad40000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007af8 R08: ffff88802ad40000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: f8f8f8f8f8f8f8f8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000f28
FS: 00007f3a739d46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000327030 CR3: 0000000060bf1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5226
ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
mac80211_hwsim_beacon_tx+0x104/0x900 drivers/net/wireless/mac80211_hwsim.c:1812
__iterate_interfaces+0x225/0x4c0 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+0x4ea/0xb60 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
handle_softirqs+0x336/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 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:rmqueue_pcplist mm/page_alloc.c:3711 [inline]
RIP: 0010:rmqueue mm/page_alloc.c:3742 [inline]
RIP: 0010:get_page_from_freelist+0x1f20/0x2670 mm/page_alloc.c:4189
Code: 8f 84 24 c0 01 00 00 f7 84 24 c0 01 00 00 00 02 00 00 c6 44 08 04 f8 0f 85 89 02 00 00 41 f7 c5 00 02 00 00 74 01 fb 4d 85 f6 <44> 8b 6c 24 2c 0f 84 d5 00 00 00 4c 89 f0 48 c1 e8 03 80 3c 08 00
RSP: 0018:ffffc90005fef060 EFLAGS: 00000286
RAX: 1ffff92000bfde40 RBX: ffffffff8be64820 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: ffffc90005fef2b0 R08: ffffffff910470f7 R09: 1ffffffff2208e1e
R10: dffffc0000000000 R11: fffffbfff2208e1f R12: ffff88813fffd310
R13: 0000000000000202 R14: ffffea0001616400 R15: 0000000001100dca
__alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
alloc_pages_vma+0x2bc/0x790 mm/mempolicy.c:2146
wp_page_copy+0x225/0x2090 mm/memory.c:3051
handle_pte_fault mm/memory.c:4668 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x1fbd/0x4440 mm/memory.c:4883
do_user_addr_fault+0x494/0xc90 arch/x86/mm/fault.c:1355
handle_page_fault arch/x86/mm/fault.c:1443 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0010:__put_user_nocheck_4+0x3/0x11
Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 90 90 90 90 90 90 48 bb f9 ef ff ff ff 7f
RSP: 0018:ffffc90005fef8f8 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000200000327030
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc90005fefa90 R08: ffffc90005fef707 R09: 1ffff92000bfdee0
R10: dffffc0000000000 R11: fffff52000bfdee1 R12: dffffc0000000000
R13: 0000200000327000 R14: 0000000000000000 R15: ffffc90005fefd90
____sys_recvmsg+0x38d/0x5b0 net/socket.c:2678
___sys_recvmsg+0x213/0x5c0 net/socket.c:2707
do_recvmmsg+0x360/0x7f0 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+0x195/0x250 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: 0033:0x7f3a7579eb19
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:00007f3a739d4028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f3a75a25090 RCX: 00007f3a7579eb19
RDX: 0000000000010106 RSI: 00002000000021c0 RDI: 0000000000000004
vkms_vblank_simulate: vblank timer overrun
RBP: 00007f3a75836b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a75a25128 R14: 00007f3a75a25090 R15: 00007ffdc72a8c78
----------------
Code disassembly (best guess):
0: 8f 84 24 c0 01 00 00 pop 0x1c0(%rsp)
7: f7 84 24 c0 01 00 00 testl $0x200,0x1c0(%rsp)
e: 00 02 00 00
12: c6 44 08 04 f8 movb $0xf8,0x4(%rax,%rcx,1)
17: 0f 85 89 02 00 00 jne 0x2a6
1d: 41 f7 c5 00 02 00 00 test $0x200,%r13d
24: 74 01 je 0x27
26: fb sti
27: 4d 85 f6 test %r14,%r14
* 2a: 44 8b 6c 24 2c mov 0x2c(%rsp),%r13d <-- trapping instruction
2f: 0f 84 d5 00 00 00 je 0x10a
35: 4c 89 f0 mov %r14,%rax
38: 48 c1 e8 03 shr $0x3,%rax
3c: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)