------------[ cut here ]------------
WARNING: CPU: 1 PID: 15981 at kernel/events/core.c:10356 __perf_event_overflow+0xb3b/0xe40 kernel/events/core.c:10356
Modules linked in:
CPU: 1 UID: 0 PID: 15981 Comm: syz.0.2622 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__perf_event_overflow+0xb3b/0xe40 kernel/events/core.c:10356
Code: 08 4c 89 f7 e8 36 e0 33 00 4d 89 3e e9 bc fa ff ff 48 c7 44 24 40 00 00 00 00 e8 20 ba cf ff e9 1c fe ff ff e8 16 ba cf ff 90 <0f> 0b 90 e9 2d ff ff ff e8 08 ba cf ff 48 c7 c7 60 f0 93 8b e8 dc
RSP: 0018:ffffc90003a07740 EFLAGS: 00010283
RAX: ffffffff81f00b8a RBX: 1ffff1100cea7f6d RCX: 0000000000080000
RDX: ffffc90017804000 RSI: 0000000000000be2 RDI: 0000000000000be3
RBP: ffffc90003a07850 R08: ffff88806753f90f R09: 1ffff1100cea7f21
R10: dffffc0000000000 R11: ffffed100cea7f22 R12: dffffc0000000000
R13: ffff88806753f6c0 R14: ffff88806753f908 R15: 0000000000000000
FS:  00007fbe0e5626c0(0000) GS:ffff888125d11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110e22fff6 CR3: 000000007b3fc000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
 <TASK>
 perf_swevent_overflow kernel/events/core.c:10454 [inline]
 perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1
 do_perf_sw_event kernel/events/core.c:10594 [inline]
 ___perf_sw_event+0x4a1/0x700 kernel/events/core.c:10621
 __perf_sw_event+0xfa/0x1a0 kernel/events/core.c:10633
 perf_sw_event include/linux/perf_event.h:1596 [inline]
 do_user_addr_fault+0x12e4/0x1390 arch/x86/mm/fault.c:1283
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__get_user_4+0x14/0x20 arch/x86/lib/getuser.S:88
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 ba 00 f0 ff ff ff 7f 00 00 48 39 d0 48 0f 47 c2 0f 01 cb <8b> 10 31 c0 0f 01 ca e9 90 03 04 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003a07d78 EFLAGS: 00050287
RAX: 000000110e22fff6 RBX: ffff88802748a440 RCX: 59e000a279bcfc00
RDX: 00007ffffffff000 RSI: ffffffff8dbaa5db RDI: ffffffff8be34480
RBP: ffffc90003a07ea8 R08: ffffc90003a079d7 R09: 0000000000000000
R10: ffffc90003a079c8 R11: fffff52000740f3b R12: 00000000c004743e
R13: ffff88807720e3d8 R14: ffff88807720e380 R15: 1ffff1100ee41c7b
 ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1063 [inline]
 ppp_ioctl+0x386/0x19a0 drivers/net/ppp/ppp_generic.c:738
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe0d78eec9
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:00007fbe0e562038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbe0d9e5fa0 RCX: 00007fbe0d78eec9
RDX: 000000110e22fff6 RSI: 00000000c004743e RDI: 0000000000000008
RBP: 00007fbe0d811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe0d9e6038 R14: 00007fbe0d9e5fa0 R15: 00007ffc4303f388
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	48 ba 00 f0 ff ff ff 	movabs $0x7ffffffff000,%rdx
  1d:	7f 00 00
  20:	48 39 d0             	cmp    %rdx,%rax
  23:	48 0f 47 c2          	cmova  %rdx,%rax
  27:	0f 01 cb             	stac
* 2a:	8b 10                	mov    (%rax),%edx <-- trapping instruction
  2c:	31 c0                	xor    %eax,%eax
  2e:	0f 01 ca             	clac
  31:	e9 90 03 04 00       	jmp    0x403c6
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop