[syzbot] [kernel?] WARNING in follow_pte

[syzbot <syzbot+35a4414f6e247f515443@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    734610514cb0 Merge tag 'erofs-for-6.10-rc7-fixes' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14d97066980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=de2d4dc103148cd6
dashboard link: https://syzkaller.appspot.com/bug?extid=35a4414f6e247f515443
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16c21fa9980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16008dc6980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-73461051.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d390d5c7156f/vmlinux-73461051.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b56ef48ffa7e/bzImage-73461051.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+35a4414f6e247f515443@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 3 PID: 5192 at include/linux/rwsem.h:195 rwsem_assert_held include/linux/rwsem.h:195 [inline]
WARNING: CPU: 3 PID: 5192 at include/linux/rwsem.h:195 mmap_assert_locked include/linux/mmap_lock.h:65 [inline]
WARNING: CPU: 3 PID: 5192 at include/linux/rwsem.h:195 follow_pte+0x414/0x4c0 mm/memory.c:5980
Modules linked in:
CPU: 3 PID: 5192 Comm: syz-executor340 Not tainted 6.10.0-rc6-syzkaller-00055-g734610514cb0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:rwsem_assert_held include/linux/rwsem.h:195 [inline]
RIP: 0010:mmap_assert_locked include/linux/mmap_lock.h:65 [inline]
RIP: 0010:follow_pte+0x414/0x4c0 mm/memory.c:5980
Code: bf 98 01 00 00 be ff ff ff ff e8 e7 76 15 09 31 ff 41 89 c4 89 c6 e8 1b 0c bc ff 45 85 e4 0f 85 80 fc ff ff e8 0d 11 bc ff 90 <0f> 0b 90 e9 72 fc ff ff e8 ff 10 bc ff 90 0f 0b 48 c7 c7 d8 73 e4
RSP: 0018:ffffc900032af4d0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00007f9c68e60000 RCX: ffffffff81d1d2f5
RDX: ffff88802306a440 RSI: ffffffff81d1d303 RDI: 0000000000000005
RBP: ffff8880209db5d0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000010a R12: 0000000000000000
R13: ffffc900032af530 R14: ffffc900032af550 R15: ffff88802abf1c80
FS:  00005555908da380(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000c80 CR3: 000000002cfae000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 follow_phys arch/x86/mm/pat/memtype.c:957 [inline]
 get_pat_info+0xf2/0x510 arch/x86/mm/pat/memtype.c:991
 untrack_pfn+0xf7/0x4d0 arch/x86/mm/pat/memtype.c:1104
 unmap_single_vma+0x1bd/0x2b0 mm/memory.c:1819
 zap_page_range_single+0x326/0x560 mm/memory.c:1920
 unmap_mapping_range_vma mm/memory.c:3684 [inline]
 unmap_mapping_range_tree mm/memory.c:3701 [inline]
 unmap_mapping_pages mm/memory.c:3767 [inline]
 unmap_mapping_range+0x1ee/0x280 mm/memory.c:3804
 truncate_pagecache+0x53/0x90 mm/truncate.c:731
 simple_setattr+0xf2/0x120 fs/libfs.c:886
 notify_change+0xec6/0x11f0 fs/attr.c:499
 do_truncate+0x15c/0x220 fs/open.c:65
 handle_truncate fs/namei.c:3308 [inline]
 do_open fs/namei.c:3658 [inline]
 path_openat+0x2860/0x2e50 fs/namei.c:3813
 do_filp_open+0x1dc/0x430 fs/namei.c:3840
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1413
 do_sys_open fs/open.c:1428 [inline]
 __do_sys_openat fs/open.c:1444 [inline]
 __se_sys_openat fs/open.c:1439 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1439
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31b1f21859
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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:00007ffd4ff07208 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f31b1f6a0de RCX: 00007f31b1f21859
RDX: 0000000000000300 RSI: 0000000020000c80 RDI: ffffffffffffff9c
RBP: 00007f31b1f6a0bc R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f31b1f6f07c
R13: 00007f31b1f6a07c R14: 0000000000000001 R15: 0000000000000001
 </TASK>


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