------------[ cut here ]------------
!atomic_long_inc_not_zero(&event->refcount)
WARNING: kernel/events/core.c:10447 at __perf_event_overflow+0xb9e/0xec0 kernel/events/core.c:10447, CPU#0: syz.7.2100/14168
Modules linked in:
CPU: 0 UID: 0 PID: 14168 Comm: syz.7.2100 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__perf_event_overflow+0xb9e/0xec0 kernel/events/core.c:10447
Code: 90 36 00 4d 89 3e 4c 8b 7c 24 10 e9 c2 fc ff ff e8 27 43 ce ff 49 bd 00 00 00 00 00 fc ff df e9 08 fe ff ff e8 13 43 ce ff 90 <0f> 0b 90 e9 21 ff ff ff e8 05 43 ce ff 48 c7 c7 e0 11 b7 8b e8 f9
RSP: 0000:ffffc900039df780 EFLAGS: 00010283
RAX: ffffffff81f6343d RBX: ffff88807e4193d8 RCX: 0000000000080000
RDX: ffffc90023011000 RSI: 0000000000000388 RDI: 0000000000000389
RBP: ffffc900039df890 R08: ffff88807e41952f R09: 1ffff1100fc832a5
R10: dffffc0000000000 R11: ffffed100fc832a6 R12: ffff88807e4192d8
R13: dffffc0000000000 R14: ffff88807e419528 R15: 0000000000000000
FS:  00007f34a1ede6c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f34a1ede660 CR3: 0000000070b08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 perf_swevent_overflow kernel/events/core.c:10545 [inline]
 perf_swevent_event+0x323/0x650 kernel/events/core.c:-1
 do_perf_sw_event kernel/events/core.c:10685 [inline]
 ___perf_sw_event+0x4a6/0x730 kernel/events/core.c:10712
 __perf_sw_event+0xf9/0x1a0 kernel/events/core.c:10724
 perf_sw_event include/linux/perf_event.h:1596 [inline]
 mm_account_fault mm/memory.c:-1 [inline]
 handle_mm_fault+0x3128/0x32a0 mm/memory.c:6609
 do_user_addr_fault+0xa73/0x1360 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f34a0e610be
Code: 00 00 00 64 f0 83 04 25 a0 ff ff ff 01 64 48 8b 04 25 00 00 00 00 48 8d b8 d8 fe ff ff e8 0a af 0d 00 85 c0 0f 84 a2 01 00 00 <64> f0 83 2c 25 a0 ff ff ff 01 e8 b3 90 0c 00 48 8b 4c 24 08 8b 00
RSP: 002b:00007f34a1ede050 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 00007f34a1215fa0 RCX: 00007f34a1008c1f
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000007
RBP: 00007f34a1008c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34a1216038 R14: 00007f34a1215fa0 R15: 00007ffed69a4278
 </TASK>