RAX: ffffffffffffffda RBX: 0000000001bac914 RCX: 0000000000457099
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00000000009300a0 R08: 00000000200011c0 R09: 0000000000000000
R10: 0000000020001180 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000004cb8a8 R14: 00000000004c31af R15: 0000000000000036
WARNING: CPU: 1 PID: 4967 at arch/x86/mm/pat.c:1055 untrack_pfn+0x2b8/0x320 arch/x86/mm/pat.c:1055
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4967 Comm: syz-executor0 Not tainted 4.19.0-rc1+ #218
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:untrack_pfn+0x2b8/0x320 arch/x86/mm/pat.c:1055
Code: 00 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 75 39 48 81 c4 b0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 38 36 45 00 <0f> 0b eb b5 4c 89 e7 e8 8c 33 84 00 e9 86 fe ff ff 48 8b bd 28 ff
RSP: 0018:ffff8801cfa76d68 EFLAGS: 00010293
RAX: ffff8801d7306480 RBX: 1ffff10039f4edaf RCX: ffffffff81378904
RDX: 0000000000000000 RSI: ffffffff81378a48 RDI: 0000000000000005
RBP: ffff8801cfa76e40 R08: ffff8801d7306480 R09: 0000000000000000
R10: ffffed00395a5f55 R11: ffff8801cad2faab R12: ffff8801ce030358
R13: 00000000ffffffea R14: ffff8801cfa76e18 R15: 0000000000000000
 unmap_single_vma+0x1c5/0x310 mm/memory.c:1535
 unmap_vmas+0x125/0x200 mm/memory.c:1586
 exit_mmap+0x2c2/0x590 mm/mmap.c:3093
 __mmput kernel/fork.c:1002 [inline]
 mmput+0x265/0x620 kernel/fork.c:1023
 dup_mm kernel/fork.c:1290 [inline]
 copy_mm kernel/fork.c:1330 [inline]
 copy_process+0x3037/0x7ad0 kernel/fork.c:1870
 _do_fork+0x1ca/0x1170 kernel/fork.c:2167
 __do_sys_clone kernel/fork.c:2274 [inline]
 __se_sys_clone kernel/fork.c:2268 [inline]
 __x64_sys_clone+0xbf/0x150 kernel/fork.c:2268
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fffa4fc7928 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000001bac914 RCX: 0000000000457099
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00000000009300a0 R08: 00000000200011c0 R09: 0000000000000000
R10: 0000000020001180 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000004cb8a8 R14: 00000000004c31af R15: 0000000000000036
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..