free_unref_page_list+0x119/0x830 mm/page_alloc.c:3433
 release_pages+0x185f/0x1bd0 mm/swap.c:963
 tlb_batch_pages_flush mm/mmu_gather.c:50 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:241 [inline]
 tlb_flush_mmu mm/mmu_gather.c:248 [inline]
 tlb_finish_mmu+0x1b4/0x370 mm/mmu_gather.c:371
 unmap_region+0x344/0x3b0 mm/mmap.c:2669
 __do_munmap+0xa29/0xe10 mm/mmap.c:2899
 __vm_munmap+0x13f/0x240 mm/mmap.c:2952
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2974 [inline]
 __x64_sys_munmap+0x67/0x70 mm/mmap.c:2974
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
------------[ cut here ]------------
kernel BUG at mm/filemap.c:166!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4753 Comm: syz.4.120 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166
Code: e8 c8 17 db ff 4c 89 f7 48 c7 c6 20 02 33 8a e8 c9 fc 0d 00 0f 0b e8 b2 17 db ff 4c 89 f7 48 c7 c6 60 02 33 8a e8 b3 fc 0d 00 <0f> 0b 48 85 ed 75 59 e8 97 17 db ff eb 5d e8 90 17 db ff 4c 89 f7
RSP: 0018:ffffc900014ff6e8 EFLAGS: 00010046
RAX: 74eabea44ea0a200 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff5200029fed0
RBP: ffffea0001c40a88 R08: ffff8880b902795b R09: fffff5200029fe8c
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffea0001c40a80
R13: dffffc0000000000 R14: ffffea0001c40a80 R15: 1ffffd4000388151
FS:  000055556cc5f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febfa738a08 CR3: 000000001fd86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __delete_from_page_cache+0xbc/0x6c0 mm/filemap.c:231
 delete_from_page_cache+0x121/0x190 mm/filemap.c:266
 truncate_inode_page+0x8d/0xb0 mm/truncate.c:219
 shmem_undo_range+0x4f4/0x19a0 mm/shmem.c:960
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x1e2/0x9a0 mm/shmem.c:1145
 evict+0x4b6/0x8b0 fs/inode.c:647
 __dentry_kill+0x412/0x630 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 __fput+0x5a5/0x8c0 fs/file_table.c:319
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4af7487e99
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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdc66ebd08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f4af7711da0 RCX: 00007f4af7487e99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f4af7711da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f4af7711cb0 R11: 0000000000000246 R12: 000000000001cb93
R13: 00007f4af770ffac R14: 000000000001c8b4 R15: 00007ffdc66ebe10
 </TASK>
Modules linked in:
---[ end trace 55ed5756c5675f29 ]---
RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166
Code: e8 c8 17 db ff 4c 89 f7 48 c7 c6 20 02 33 8a e8 c9 fc 0d 00 0f 0b e8 b2 17 db ff 4c 89 f7 48 c7 c6 60 02 33 8a e8 b3 fc 0d 00 <0f> 0b 48 85 ed 75 59 e8 97 17 db ff eb 5d e8 90 17 db ff 4c 89 f7
RSP: 0018:ffffc900014ff6e8 EFLAGS: 00010046
RAX: 74eabea44ea0a200 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff5200029fed0
RBP: ffffea0001c40a88 R08: ffff8880b902795b R09: fffff5200029fe8c
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffea0001c40a80
R13: dffffc0000000000 R14: ffffea0001c40a80 R15: 1ffffd4000388151
FS:  000055556cc5f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febfa738a08 CR3: 000000001fd86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400