shmem_truncate_range mm/shmem.c:1249 [inline]
 shmem_evict_inode+0x26e/0xa70 mm/shmem.c:1379
 evict+0x5f4/0xae0 fs/inode.c:837
 __dentry_kill+0x209/0x660 fs/dcache.c:670
 finish_dput+0xc9/0x480 fs/dcache.c:879
 __fput+0x69d/0xa80 fs/file_table.c:476
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x694/0x22f0 kernel/exit.c:971
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
 get_signal+0x125d/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0x178/0x670 kernel/entry/common.c:196
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
------------[ cut here ]------------
kernel BUG at mm/filemap.c:155!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6970 Comm: syz.1.265 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:filemap_unaccount_folio+0x509/0x550 mm/filemap.c:155
Code: 04 c8 ff 48 89 df 48 c7 c6 40 bc f4 8a e8 cf 06 30 ff 90 0f 0b e8 37 04 c8 ff 48 89 df 48 c7 c6 80 bb f4 8a e8 b8 06 30 ff 90 <0f> 0b e8 20 04 c8 ff 48 89 df 48 c7 c6 40 bc f4 8a e8 a1 06 30 ff
RSP: 0018:ffffc900061ff0f8 EFLAGS: 00010246
RAX: dd0e01711a5fad00 RBX: ffffea0001cab580 RCX: 0000000000000046
RDX: 0000000000000004 RSI: ffffffff8cfdf0b7 RDI: ffff88802f90dac0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104923 R12: ffffea0001cab5b0
R13: ffff888039df2d90 R14: 1ffffd40003956b0 R15: ffffea0001cab588
FS:  0000000000000000(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f120ff8 CR3: 000000000d3a8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc3/0x500 mm/filemap.c:227
 filemap_remove_folio+0xe6/0x200 mm/filemap.c:257
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:176
 shmem_undo_range+0x3a9/0x1490 mm/shmem.c:1133
 shmem_truncate_range mm/shmem.c:1249 [inline]
 shmem_evict_inode+0x26e/0xa70 mm/shmem.c:1379
 evict+0x5f4/0xae0 fs/inode.c:837
 __dentry_kill+0x209/0x660 fs/dcache.c:670
 finish_dput+0xc9/0x480 fs/dcache.c:879
 __fput+0x69d/0xa80 fs/file_table.c:476
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x694/0x22f0 kernel/exit.c:971
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
 get_signal+0x125d/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4e0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f08a35cf749
Code: Unable to access opcode bytes at 0x7f08a35cf71f.
RSP: 002b:00007f08a180d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f08a3826098 RCX: 00007f08a35cf749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f08a3826098
RBP: 00007f08a3826090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f08a3826128 R14: 00007ffc620e3120 R15: 00007ffc620e3208
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x509/0x550 mm/filemap.c:155
Code: 04 c8 ff 48 89 df 48 c7 c6 40 bc f4 8a e8 cf 06 30 ff 90 0f 0b e8 37 04 c8 ff 48 89 df 48 c7 c6 80 bb f4 8a e8 b8 06 30 ff 90 <0f> 0b e8 20 04 c8 ff 48 89 df 48 c7 c6 40 bc f4 8a e8 a1 06 30 ff
RSP: 0018:ffffc900061ff0f8 EFLAGS: 00010246
RAX: dd0e01711a5fad00 RBX: ffffea0001cab580 RCX: 0000000000000046
RDX: 0000000000000004 RSI: ffffffff8cfdf0b7 RDI: ffff88802f90dac0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104923 R12: ffffea0001cab5b0
R13: ffff888039df2d90 R14: 1ffffd40003956b0 R15: ffffea0001cab588
FS:  0000000000000000(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f120ff8 CR3: 000000000d3a8000 CR4: 00000000003526f0