[v6.1] WARNING in untrack_pfn

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 0102425ac76b Linux 6.1.24
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11a75d23c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=cb976cea3176ce66
dashboard link: https://syzkaller.appspot.com/bug?extid=cf5c4eec7cbc76789db9
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2bbac2ad18f4/disk-0102425a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9000ac7a5566/vmlinux-0102425a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/08367306fcea/bzImage-0102425a.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cf5c4e...@syzkaller.appspotmail.com

WARNING: CPU: 0 PID: 5816 at arch/x86/mm/pat/memtype.c:1108 untrack_pfn+0x30e/0x490
Modules linked in:
CPU: 0 PID: 5816 Comm: syz-executor.5 Not tainted 6.1.24-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:untrack_pfn+0x30e/0x490 arch/x86/mm/pat/memtype.c:1108
Code: 8d 8c 24 a0 00 00 00 49 89 d8 e8 6d 65 8d 00 49 89 dd 89 c3 31 ff 89 c6 e8 4f 30 4b 00 85 db 0f 84 b2 00 00 00 e8 e2 2c 4b 00 <0f> 0b 48 bb 00 00 00 00 00 fc ff df eb 4f 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90014ae7380 EFLAGS: 00010246
RAX: ffffffff813e541e RBX: 00000000ffffffea RCX: 0000000000040000
RDX: ffffc90004002000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90014ae7490 R08: ffffffff813e5411 R09: ffffffff8a738aa5
R10: 0000000000000003 R11: ffff8880255f1d40 R12: 1ffff1100e9ac795
R13: ffffc90014ae7400 R14: dffffc0000000000 R15: ffff888074d63ca8
FS: 00007f8760c81700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003e40 CR3: 000000001eae8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
unmap_single_vma+0x1e3/0x290 mm/memory.c:1659
unmap_vmas+0x3c4/0x560 mm/memory.c:1720
exit_mmap+0x252/0x9f0 mm/mmap.c:3089
__mmput+0x115/0x3c0 kernel/fork.c:1191
mmput kernel/fork.c:1213 [inline]
dup_mm+0x11f0/0x1610 kernel/fork.c:1548
copy_mm+0xca/0x160 kernel/fork.c:1581
copy_process+0x19a2/0x4020 kernel/fork.c:2259
kernel_clone+0x222/0x920 kernel/fork.c:2679
__do_sys_clone kernel/fork.c:2820 [inline]
__se_sys_clone kernel/fork.c:2804 [inline]
__x64_sys_clone+0x231/0x280 kernel/fork.c:2804
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
RIP: 0033:0x7f875fe8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8760c81118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f875ffabf80 RCX: 00007f875fe8c169
RDX: 0000000020001780 RSI: 0000000000000000 RDI: 0000000001100000
RBP: 00007f8760c811d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002
R13: 00007ffe6bd5038f R14: 00007f8760c81300 R15: 0000000000022000
</TASK>


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.