CPU: 1 PID: 3494 Comm: syz-executor842 Not tainted 6.0.0-rc5-syzkaller-48543-g968c2729e576 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:untrack_pfn+0x407/0x5b0 arch/x86/mm/pat/memtype.c:1107
Code: 90 0c 00 00 31 ff 89 c6 e8 46 95 53 00 85 db 74 0b f7 d3 44 21 f3 0f 84 2a 01 00 00 45 85 f6 0f 84 32 01 00 00 e8 79 91 53 00 <0f> 0b eb 5b 44 8b 75 c8 48 8d 7d c8 e8 58 94 d2 00 44 8b 20 44 8b
RSP: 0018:ffff888122adf758 EFLAGS: 00010293
RAX: ffffffff8156ef57 RBX: 0000000000000000 RCX: ffff88810e5bc180
=====================================================
BUG: KMSAN: uninit-value in __show_regs+0xb20/0xc90 arch/x86/kernel/process_64.c:83
 __show_regs+0xb20/0xc90 arch/x86/kernel/process_64.c:83
 show_regs+0x6e/0xd0 arch/x86/kernel/dumpstack.c:469
 __warn+0x242/0x580 kernel/panic.c:621
 report_bug+0x7ff/0xa10 lib/bug.c:198
 handle_bug+0x41/0x70 arch/x86/kernel/traps.c:316
 exc_invalid_op+0x1b/0x50 arch/x86/kernel/traps.c:336
 asm_exc_invalid_op+0x1b/0x20
 untrack_pfn+0x407/0x5b0
 unmap_single_vma+0x2d1/0x570 mm/memory.c:1671
 unmap_vmas+0x247/0x430 mm/memory.c:1732
 exit_mmap+0x1af/0x780 mm/mmap.c:3116
 __mmput+0x147/0x510 kernel/fork.c:1189
 mmput kernel/fork.c:1210 [inline]
 dup_mm+0x283/0x680 kernel/fork.c:1543
 copy_mm+0x141/0x2b0 kernel/fork.c:1579
 copy_process+0x2afb/0x69f0 kernel/fork.c:2259
 kernel_clone+0x42f/0x1120 kernel/fork.c:2676
 __do_sys_clone kernel/fork.c:2810 [inline]
 __se_sys_clone kernel/fork.c:2794 [inline]
 __x64_sys_clone+0x261/0x390 kernel/fork.c:2794
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Local variable ptl created at:
 follow_phys+0x67/0x430 mm/memory.c:5345
 untrack_pfn+0x3bd/0x5b0 arch/x86/mm/pat/memtype.c:1106

CPU: 1 PID: 3494 Comm: syz-executor842 Not tainted 6.0.0-rc5-syzkaller-48543-g968c2729e576 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
=====================================================