WARNING: CPU: 0 PID: 27948 at arch/x86/mm/pat.c:1064 untrack_pfn+0x247/0x290 arch/x86/mm/pat.c:1064
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 27948 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:untrack_pfn+0x247/0x290 arch/x86/mm/pat.c:1064
Code: 84 6c ff ff ff e8 09 55 37 00 4c 89 ee 4c 89 e7 e8 ae da ff ff e8 f9 54 37 00 48 85 db 0f 85 58 ff ff ff eb 82 e8 e9 54 37 00 <0f> 0b e9 76 ff ff ff 48 89 df e8 ca 31 6d 00 e9 98 fe ff ff e8 60
RSP: 0018:ffff88803e377910 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880a2c70420 RCX: ffffc9000693a000
RDX: 0000000000040000 RSI: ffffffff812b3087 RDI: 0000000000000005
RBP: 1ffff11007c6ef22 R08: ffff88803e377878 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffffffea
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a2c70470
 unmap_single_vma+0x1bc/0x300 mm/memory.c:1558
 unmap_vmas+0xa9/0x180 mm/memory.c:1609
 exit_mmap+0x2b9/0x530 mm/mmap.c:3093
 __mmput kernel/fork.c:1016 [inline]
 mmput+0x14e/0x4a0 kernel/fork.c:1037
 dup_mm kernel/fork.c:1301 [inline]
 copy_mm kernel/fork.c:1341 [inline]
 copy_process.part.0+0x662a/0x8260 kernel/fork.c:1913
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f9af6a07209
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9af537c118 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f9af6b19f60 RCX: 00007f9af6a07209
RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000000
RBP: 00007f9af537c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffecc68645f R14: 00007f9af537c300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..