folio_batch_release include/linux/pagevec.h:101 [inline]
 shmem_undo_range+0x58f/0x1150 mm/shmem.c:1120
 shmem_truncate_range mm/shmem.c:1232 [inline]
 shmem_evict_inode+0x3a1/0xbe0 mm/shmem.c:1360
 evict+0x3e3/0x920 fs/inode.c:810
 iput_final fs/inode.c:1914 [inline]
 iput.part.0+0x6a9/0xb00 fs/inode.c:1966
 iput+0x35/0x40 fs/inode.c:1929
 dentry_unlink_inode+0x29c/0x480 fs/dcache.c:466
 __dentry_kill+0x1d0/0x600 fs/dcache.c:669
 dput.part.0+0x4b1/0x9b0 fs/dcache.c:911
 dput+0x1f/0x30 fs/dcache.c:901
 __fput+0x51c/0xb70 fs/file_table.c:476
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x419/0x4b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:154!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 2760 Comm: syz.7.5899 Tainted: G     U              syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:filemap_unaccount_folio+0xf1/0x9f0 mm/filemap.c:154
Code: 65 04 c9 ff 89 ee 31 ff 4c 8d 6b 30 e8 98 ff c8 ff 85 ed 7e 17 e8 4f 04 c9 ff 48 c7 c6 20 3c 79 8b 48 89 df e8 d0 13 12 00 90 <0f> 0b e8 38 04 c9 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900034a7258 EFLAGS: 00010083
RAX: 000000000007f43e RBX: ffffea00014c3c80 RCX: ffffc90018db1000
RDX: 0000000000080000 RSI: ffffffff81f1a020 RDI: ffff88802eaa5f44
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000000740d8 R12: ffff88803189cac8
R13: ffffea00014c3cb0 R14: ffffc900034a74d0 R15: 0000000000000001
FS:  00007f51b31586c0(0000) GS:ffff888124e7e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b338daff8 CR3: 000000007851e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_remove_folio mm/filemap.c:226 [inline]
 filemap_remove_folio+0xf1/0x250 mm/filemap.c:256
 truncate_inode_folio+0x49/0x70 mm/truncate.c:176
 shmem_undo_range+0x376/0x1150 mm/shmem.c:1116
 shmem_truncate_range mm/shmem.c:1232 [inline]
 shmem_fallocate+0x9e8/0xf50 mm/shmem.c:3684
 vfs_fallocate+0x5b1/0x10e0 fs/open.c:342
 madvise_remove mm/madvise.c:1049 [inline]
 madvise_vma_behavior+0x2ac9/0x2d50 mm/madvise.c:1346
 madvise_walk_vmas+0x31f/0x9c0 mm/madvise.c:1669
 madvise_do_behavior+0x1e2/0x530 mm/madvise.c:1885
 do_madvise+0x176/0x240 mm/madvise.c:1978
 __do_sys_madvise mm/madvise.c:1987 [inline]
 __se_sys_madvise mm/madvise.c:1985 [inline]
 __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1985
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f51b238eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f51b3158038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f51b25e6270 RCX: 00007f51b238eec9
RDX: 0000000000000009 RSI: 000000000020499d RDI: 0000000000000000
RBP: 00007f51b2411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f51b25e6308 R14: 00007f51b25e6270 R15: 00007ffefc56a448
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0xf1/0x9f0 mm/filemap.c:154
Code: 65 04 c9 ff 89 ee 31 ff 4c 8d 6b 30 e8 98 ff c8 ff 85 ed 7e 17 e8 4f 04 c9 ff 48 c7 c6 20 3c 79 8b 48 89 df e8 d0 13 12 00 90 <0f> 0b e8 38 04 c9 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900034a7258 EFLAGS: 00010083
RAX: 000000000007f43e RBX: ffffea00014c3c80 RCX: ffffc90018db1000
RDX: 0000000000080000 RSI: ffffffff81f1a020 RDI: ffff88802eaa5f44
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000000740d8 R12: ffff88803189cac8
R13: ffffea00014c3cb0 R14: ffffc900034a74d0 R15: 0000000000000001
FS:  00007f51b31586c0(0000) GS:ffff888124e7e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b338daff8 CR3: 000000007851e000 CR4: 00000000003526f0