------------[ cut here ]------------
WARNING: CPU: 1 PID: 7974 at kernel/events/core.c:10369 __perf_event_overflow+0xb3b/0xe40 kernel/events/core.c:10369
Modules linked in:
CPU: 1 UID: 0 PID: 7974 Comm: syz.1.503 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__perf_event_overflow+0xb3b/0xe40 kernel/events/core.c:10369
Code: 08 4c 89 f7 e8 36 00 35 00 4d 89 3e e9 bc fa ff ff 48 c7 44 24 40 00 00 00 00 e8 00 4a cf ff e9 1c fe ff ff e8 f6 49 cf ff 90 <0f> 0b 90 e9 2d ff ff ff e8 e8 49 cf ff 48 c7 c7 60 0c 74 8b e8 ac
RSP: 0018:ffffc9000528f480 EFLAGS: 00010287
RAX: ffffffff81f0cc9a RBX: 1ffff1100e745f6d RCX: 0000000000080000
RDX: ffffc9000df37000 RSI: 0000000000001f1c RDI: 0000000000001f1d
RBP: ffffc9000528f590 R08: ffff888073a2f90f R09: 1ffff1100e745f21
R10: dffffc0000000000 R11: ffffed100e745f22 R12: dffffc0000000000
R13: ffff888073a2f6c0 R14: ffff888073a2f908 R15: 0000000000000000
FS:  00007f89161796c0(0000) GS:ffff88812623d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 0000000029702000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 perf_swevent_overflow kernel/events/core.c:10467 [inline]
 perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1
 do_perf_sw_event kernel/events/core.c:10607 [inline]
 ___perf_sw_event+0x4a1/0x700 kernel/events/core.c:10634
 __perf_sw_event+0xfa/0x1a0 kernel/events/core.c:10646
 perf_sw_event include/linux/perf_event.h:1596 [inline]
 do_user_addr_fault+0x12d9/0x1380 arch/x86/mm/fault.c:1283
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0010:fault_in_readable+0x8e/0x130 mm/gup.c:2161
Code: a9 00 00 00 0f 01 cb 0f ae e8 4d 85 f6 40 0f 95 c5 4c 89 ff 4c 89 f6 e8 40 94 b6 ff 4d 39 f7 0f 97 c0 40 84 c5 74 43 4d 89 f5 <41> 8a 45 00 88 44 24 07 49 81 e5 00 f0 ff ff 4d 8d a5 00 10 00 00
RSP: 0018:ffffc9000528faa8 EFLAGS: 00050202
RAX: ffffffff82098401 RBX: 0000000000001000 RCX: ffff88804c450000
RDX: 0000000000000002 RSI: 0000200000002000 RDI: 0000200000003000
RBP: dffffc0000000001 R08: ffff88804c450000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00007ffffffff000
R13: 0000200000002000 R14: 0000200000002000 R15: 0000200000003000
 fault_in_iov_iter_readable+0x1b4/0x2f0 lib/iov_iter.c:94
 generic_perform_write+0x7b5/0x900 mm/filemap.c:4291
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3464
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f891538f6c9
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:00007f8916179038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f89155e6090 RCX: 00007f891538f6c9
RDX: 00000000002a979d RSI: 0000200000000000 RDI: 0000000000000011
RBP: 00007f8915411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f89155e6128 R14: 00007f89155e6090 R15: 00007fff209ab608
 </TASK>
----------------
Code disassembly (best guess):
   0:	a9 00 00 00 0f       	test   $0xf000000,%eax
   5:	01 cb                	add    %ecx,%ebx
   7:	0f ae e8             	lfence
   a:	4d 85 f6             	test   %r14,%r14
   d:	40 0f 95 c5          	setne  %bpl
  11:	4c 89 ff             	mov    %r15,%rdi
  14:	4c 89 f6             	mov    %r14,%rsi
  17:	e8 40 94 b6 ff       	call   0xffb6945c
  1c:	4d 39 f7             	cmp    %r14,%r15
  1f:	0f 97 c0             	seta   %al
  22:	40 84 c5             	test   %al,%bpl
  25:	74 43                	je     0x6a
  27:	4d 89 f5             	mov    %r14,%r13
* 2a:	41 8a 45 00          	mov    0x0(%r13),%al <-- trapping instruction
  2e:	88 44 24 07          	mov    %al,0x7(%rsp)
  32:	49 81 e5 00 f0 ff ff 	and    $0xfffffffffffff000,%r13
  39:	4d 8d a5 00 10 00 00 	lea    0x1000(%r13),%r12